AstroForum

[- ASTRONOMIJA -] => ASTROFOTOGRAFIJA => Autor teme: Danijel - 09.12.2008. u 18:30:06 sati

Naslov: O astrofotografiji
Autor: Danijel - 09.12.2008. u 18:30:06 sati
Ova tema je usidrena i u njoj ćete pronaći korisne linkove na mjesta koja se bave astrofotografijom i njezinom obradom. Dakle, navalite, stavljajte linkove. Gledajte da ipak ne dodajete gole linkove, natipkajte ukratko mali opis na kakvu stranicu link vodi, to je radi lakšeg traženja prave stranice s informacijama. :251:
Naslov: Odg: O astrofotografiji
Autor: HrAstro - 09.12.2008. u 22:31:58 sati
Sluzbeni tutorijali za rad sa PixInsigt-om;
http://pixinsight.com/tutorials/index.html
Obavezno prouciti rad sa histogramima, jer je i opce primijenjivo kako ih pravilno rastegnuti
Naslov: Odg: O astrofotografiji
Autor: HrAstro - 09.12.2008. u 22:33:12 sati
Kako stackirati fotke u IRISU (meni najbrzi i najjednostavniji tutorial o doticnome);
http://astrosurf.com/buil/iris/roadmap/help
Naslov: Odg: O astrofotografiji
Autor: HrAstro - 09.12.2008. u 22:36:13 sati
Tutorijali o obradi astrofotografija (izdvajam svakako "Combining Different Exposures to Hold Detail Method 1");
http://www.astropix.com/HTML/J_DIGIT/TOC_DIG.HTM
Naslov: Odg: O astrofotografiji
Autor: Danijel - 09.12.2008. u 22:47:08 sati
Vidov prijevod teksta na Hrvatski jezik o obradi fotografija u Irisu (http://vidastro.blogspot.com/search/label/obrada%20fotografija).
Naslov: Odg: O astrofotografiji
Autor: davor - 10.12.2008. u 07:53:04 sati
 Ovdje (http://www.astronomie.be/registax) se može skinuti Registax, program za stackiranje i obradu astrofotografija, a tu je i
User Manual (http://www.astronomie.be/registax/RegiStax4UserManual_Revision1.pdf).
Naslov: Odg: O astrofotografiji
Autor: bojan - 11.12.2008. u 10:43:06 sati
Bahtinova maska za lakse fokusiranje...

http://tech.groups.yahoo.com/group/Stellarvue/message/91248
http://www.youtube.com/watch?v=OFZKBop0ILU

Naslov: Odg: O astrofotografiji
Autor: vid - 15.12.2008. u 17:54:39 sati
Upute koje sam napravio za obradu stackirane fotke u Photoshopu:

http://vidastro.blogspot.com/2008/12/iris-and-photoshop-processing.html
Naslov: Odg: O astrofotografiji
Autor: Danijel - 15.12.2008. u 18:55:39 sati
E Vid, smijemo li i tvoje obje upute sa tvojih web stranica iskoristiti za izradu PDF priručnika? To bi svakako posebno napomenuli u njemu :106:
Naslov: Odg: O astrofotografiji
Autor: vid - 15.12.2008. u 19:11:13 sati
E Vid, smijemo li i tvoje obje upute sa tvojih web stranica iskoristiti za izradu PDF priručnika? To bi svakako posebno napomenuli u njemu :106:

Ma može, samo daj. Super ideja !  8)
Naslov: Odg: O astrofotografiji
Autor: vid - 15.12.2008. u 19:12:29 sati
E Vid, smijemo li i tvoje obje upute sa tvojih web stranica iskoristiti za izradu PDF priručnika? To bi svakako posebno napomenuli u njemu :106:
U stvari imas 3 upute, Deepsky snimanje, IRIS i Photoshop...
Naslov: Odg: O astrofotografiji
Autor: Danijel - 15.12.2008. u 19:17:21 sati
Hvala lijepo Vid, ovo će nam puno pomoći, a i skratiti vrijeme oko pripreme tekstova :hopla:
Naslov: Odg: O astrofotografiji
Autor: bozzom - 15.12.2008. u 22:29:00 sati
Ovo je došlo ko naručeno,taman kad sam u nabavci SLRa.  :hopla:
Naslov: Odg: O astrofotografiji
Autor: Danijel - 15.12.2008. u 22:58:51 sati
U stvari imas 3 upute, Deepsky snimanje, IRIS i Photoshop...

Stvarno, evo tu je i link na Deepsky  (http://vidastro.blogspot.com/2008/06/deepsky-snimanje.html) :hopla:
Naslov: Odg: O astrofotografiji
Autor: dag - 15.12.2008. u 23:12:08 sati
E Vid, smijemo li i tvoje obje upute sa tvojih web stranica iskoristiti za izradu PDF priručnika? To bi svakako posebno napomenuli u njemu :106:
Ne, ne mozes nis napomenuti jer je i on to nekome maznuo ...  :mrgreen:
Naslov: Odg: O astrofotografiji
Autor: Danijel - 15.12.2008. u 23:18:15 sati
Ne, ne mozes nis napomenuti jer je i on to nekome maznuo ...  :mrgreen:

Pa pisat će - Maznuo: Vid Nikolić :zubo:
Naslov: Odg: O astrofotografiji
Autor: davor - 16.12.2008. u 09:02:04 sati
Na ovoj stranici je detaljno objašnjeno kako se u Photoshopu obrađuju fotografije s visokom dinamikom svjetline, a da se pritom ne izgube svijetli, odnosno tamni detalji. Mogu se  koristiti priložene fotografije i praktično  isprobati tehniku. Ja sam probao, ide. 

http://www.astropix.com/HTML/J_DIGIT/LAYMASK.HTM
Naslov: Odg: O astrofotografiji
Autor: dag - 16.12.2008. u 12:39:00 sati
To vec znamo, nego problem je sto je na engleskom. Mozes prevesti?
Naslov: Odg: O astrofotografiji
Autor: davor - 16.12.2008. u 13:05:12 sati
To vec znamo, nego problem je sto je na engleskom. Mozes prevesti?

Trebalo bi cijelu knjigu prevesti, od početka. Ja prevedem ovu stranicu, a ti ostatak knjige, može?
Naslov: Odg: O astrofotografiji
Autor: dag - 16.12.2008. u 13:48:22 sati
Prestar sam da bih mogao tebe pratiti ... pisi sporije.
Naslov: Odg: O astrofotografiji
Autor: HrAstro - 15.03.2009. u 10:17:31 sati
http://www.ewellobservatory.com/bestpractices/player.html
par riječi o važnosti pojedinih koraka u pripremi oko samog snimanja (usjeveravanje, kolimacija, PAE....)
Naslov: Odg: O astrofotografiji
Autor: HrAstro - 13.02.2010. u 11:19:25 sati
http://www.astrophotoinsight.com/taxonomy/term/39

Link na prezentaciju Rob Gendler-a o kreiranju hibridnih astrofotografija tj. kombiniranju razlicitih tenhika, teleskopa, filtera i kamera u svrhu kreiranja "super-astrofotke"

Nisam siguran jel se treba registrirati da bi se link vidio i koristio!
Naslov: Odg: O astrofotografiji
Autor: D@rius - 17.02.2010. u 17:30:16 sati
Izvinjavam se ako je malo off topic i ako je već bilo no ovaj video o fotografiji mi se baš svidio: http://art.docuwat.ch/videos/genius-of-photography/the-genius-of-photography-01-fixing-the-shadows/?channel_id=0&skip=0 (http://art.docuwat.ch/videos/genius-of-photography/the-genius-of-photography-01-fixing-the-shadows/?channel_id=0&skip=0)  :wink:
Naslov: Odg: O astrofotografiji
Autor: Arkturus - 30.08.2010. u 22:13:08 sati
Jedno laičko pitanje.
Jel astrofotografija najzahtijevnija grana fotografije?
Naslov: Odg: O astrofotografiji
Autor: McPingvin - 30.08.2010. u 22:18:14 sati
Ovisi s kojeg aspekta. Tehnološki? Vrlo lako moguće. Trebaš nekada imati posebno modificirane fotoaparate, vrlo jaku optiku...

No, opet, tu nema nikakvog hvatanja osobnosti kojeg imaš kada slikaš model. Jedino osvijetljenje koje trebaš imati je što bolji mrak, ne moraš tražiti nove pozicije za nikad viđene panoramske fotke itd.

Mislim, ja sam isto laik ^^
Naslov: Odg: O astrofotografiji
Autor: Stefano - 30.08.2010. u 22:40:00 sati
Jedno laičko pitanje.
Jel astrofotografija najzahtijevnija grana fotografije?

Pa... teško pitanje. Večina nas se mući sa nesavršenostima optike, u najboljoj mjeri zbog financija. Dobro ja nisam astrofotograf, al mi se piše. Sa savršenom optikom, i softverima i raznim drangulijama, vidim da ljudi fotkaju na daljinski. Pa ispada, koliko uloženog toliko i dobivenog.
Za neki WOW snimak, nekog vrlo atraktivnog mjesta, životinje, ćega god, ljudi imaju (uglavnom) najskuplju opremu i onda im se potrefi samo jedan dan u godini da dobiju dobro svijetlo na recimo neku planinu ispod koje teče voda ili je jezero, a na to mjesto su dolazili nekoliko puta, prevaljujući stotine ili tisuće kilometara.
Astrofotografi imaju lakši izbor objekata, samo im se treba posrećiti sa vremenom i LP-em.
Shvati ovo kao djelomičan laički odgovor, jer pravi treba imati puno više parametara.
Ja bi rekao da nije najzahtjevnija!
Naslov: Odg: O astrofotografiji
Autor: Arkturus - 30.08.2010. u 23:08:13 sati
Sori, ja sam postavio prepovršno pitanje.
Mislio sam tipa, treba praćenje, treba napajanje, treba obrada svake sitnice (točkice, zvjezdice) u fotki, treba izuzetno bistro nebo, treba oprema...
Ne znam dal u nekoj drugoj grani fotografije treba na toliko stvari obraćati pažnju.
Naravno mislio sam na ozbiljno napravljene fotke, ne samo da se raspozna da je to neka maglica ili planet ili galaksija i sl.
Naslov: Odg: O astrofotografiji
Autor: Stefano - 30.08.2010. u 23:34:46 sati
Sori, ja sam postavio prepovršno pitanje.
Mislio sam tipa, treba praćenje, treba napajanje, treba obrada svake sitnice (točkice, zvjezdice) u fotki, treba izuzetno bistro nebo, treba oprema...
Ne znam dal u nekoj drugoj grani fotografije treba na toliko stvari obraćati pažnju.
Naravno mislio sam na ozbiljno napravljene fotke, ne samo da se raspozna da je to neka maglica ili planet ili galaksija i sl.

Da, mislimo na ozbiljne fotke. Nisam pametan kaj reći ali ne mogu tvrditi da je astrofoto najkompleksnije i najzahtjevnije.
Naslov: Odg: O astrofotografiji
Autor: orion69 - 31.08.2010. u 01:02:37 sati
Jedno laičko pitanje.
Jel astrofotografija najzahtijevnija grana fotografije?

IMHO astrofotografija je možda tehnički vrlo zahtjevna što se tiče opreme, načina korištenja opreme i obrade fotografije. Međutim, meni se čini da je umjetničku fotografiju daleko teže snimiti zato što za to treba imati talenta odnosno "oko", nikakav fotoaparat niti objektiv neće puno pomoći ako nemaš talenta. Zato sam se i odlučio malo probati astrofoto. Na ovo pitanje najbolje mogu odgovoriti oni koji se uspješno bave i jednim i drugim  (Bobo...)  
Naslov: Odg: O astrofotografiji
Autor: dag - 31.08.2010. u 09:50:56 sati
Sogurno je jedna od najzahtjevnijih. Posebno sto se tice hardvera.
No kao u svim djelatnostima, ako se zele prakticirati na vrhunskom nivou, postaju veoma zahtjevne.
Naslov: Odg: O astrofotografiji
Autor: Arkturus - 31.08.2010. u 13:41:14 sati
Hvala na odgovorima i mišljenjima.
Naslov: Odg: O astrofotografiji
Autor: Miha - 12.09.2010. u 11:41:46 sati
Razne upute za obradu planetarnih slika

Planetary Processing My Way (http://paulhaese.net/planetaryprocessing.html)
Planetary imaging with Iris  (http://www.skyimaging.com/planetlrgb.php)
Michael A. Phillips' Planetary Processing Routine version 7.0 (http://maphilli14.multiply.com/journal/item/37/Michael_A._Phillips_Planetary_Processing_Routine_version_7.0)
Planetary Imaging and Image Processing (http://www.iceinspace.com.au/index.php?id=63,306,0,0,1,0)
Naslov: Odg: O astrofotografiji
Autor: Stefano - 06.12.2010. u 23:41:44 sati
Usporedba uskopojasnih OIII filtera...
http://old.astrodon.com/oldsite/6v3/6v3.html
Naslov: Odg: O astrofotografiji
Autor: Stefano - 08.12.2010. u 08:58:31 sati
Primjena raznih uskopojasnih filtera i dobiveni rezultati...
http://www.sharma-astro.net/nebulae.html
Naslov: Odg: O astrofotografiji
Autor: Stefano - 08.12.2010. u 09:05:35 sati
Nekoliko tutoriala za PS obradu astrofotografija

Basic image enhancements using Photoshop
http://sharmaastronet.ipage.com/PS1.pdf

High dynamic range image creation using layer masking in Photoshop
http://sharmaastronet.ipage.com/PS2.pdf

Reducing star bloat using Photoshop
http://sharmaastronet.ipage.com/PS3.pdf

Bringing up color saturation in LAB colorspace
http://sharmaastronet.ipage.com/PS4.pdf

Izvor linkova:
http://www.sharma-astro.net/index.html
Naslov: Odg: O astrofotografiji
Autor: Stefano - 29.12.2010. u 21:04:57 sati
7 pravila z astrofotografiji...

http://www.myastrospace.com/Seven_Rules_Astrophotography.htm
Naslov: Odg: O astrofotografiji
Autor: brunoc - 09.02.2011. u 22:31:03 sati
može neki tutorial kako napravit startrails ? trebao bi mi za petak, cijela noć je moja samo da bude čisto nebo
Naslov: Odg: O astrofotografiji
Autor: McPingvin - 10.02.2011. u 03:53:10 sati
Uperiš fotić, okineš bulb mode i čekaš :D
Naslov: Odg: O astrofotografiji
Autor: brunoc - 10.02.2011. u 08:28:11 sati
kako da namjestim bulb mode...radi se o SONY DSC-S650 fotiću
Naslov: Odg: O astrofotografiji
Autor: McPingvin - 10.02.2011. u 17:05:36 sati
S tom zvijeri, na žalost, nikako :)
Naslov: Odg: O astrofotografiji
Autor: brunoc - 10.02.2011. u 20:27:19 sati
:( ajoj...baš nikako nikako? :( bar ću mjesec i jupiter moći uhvatit ako ništa
Naslov: Odg: O astrofotografiji
Autor: McPingvin - 10.02.2011. u 21:50:56 sati
S idiotima je jako malen izbor objekata za snimanje. Kompakti su nešto bolji, no tek s SLR-ovima imaš otvoreno polje mogućnosti :)

Nemoj biti obeshrabren, naravno da se i tvojim fotićem može uhvatiti nešto, svakim se može. Uz puno truda ni ne treba ti teleskop, samo je pitanje koliko si voljan uložiti (vremena i novaca) u ovaj hobi :)
Naslov: Odg: O astrofotografiji
Autor: Todor - 10.02.2011. u 23:57:09 sati
Za startrailse su najbolji analogni fotići. Kod njih šum ne bude zezao.
Naslov: Odg: O astrofotografiji
Autor: brunoc - 11.02.2011. u 08:28:54 sati
Misliš na one sa filmom za razvijanje :) haha
Naslov: Odg: O astrofotografiji
Autor: Bobo - 05.01.2012. u 18:17:10 sati
Za startrailse su najbolji analogni fotići. Kod njih šum ne bude zezao.

Evo na tu temu sam napisao tekst o tome kako snimati star trailse: http://www.astrobobo.net/?p=514 . Možda bih trebao dodati koje detalje vezane za snimanje digitalcima, sa vremenom ću to malo ispolirati. Javite ako ima kakvih prijegloda za poboljšanje.
Naslov: Odg: O astrofotografiji
Autor: Dranve - 06.01.2012. u 11:33:24 sati
Evo na tu temu sam napisao tekst o tome kako snimati star trailse: http://www.astrobobo.net/?p=514 . Možda bih trebao dodati koje detalje vezane za snimanje digitalcima, sa vremenom ću to malo ispolirati. Javite ako ima kakvih prijegloda za poboljšanje.

Koristan članak. Svaka čast.

Možda ne bi bilo loše da spomeneš "pravilo 600" kod određivanja maksimalne duljine ekspozicije, a da zvijezde i dalje ostanu točkaste izvori na fotki, bez tragova (tj. trailsa). Ugrubo, maksimalna duljina ekspozicije za određenu žarišnu duljinu može se odrediti pomoću formule: 600/žarišna duljina u mm=maksimalna duljina ekspozicije. S time da se ovo odnosi na žarišnu duljinu za 35mm senzor. Kod manjih senzora treba uzeti i crop faktor u obzir.

Ovo nije zlatno pravilo jer maksimalna duljina ekspozicije ovisi i o deklinaciji zvijezda. Kod fotkanja neba bliže nebeskom polu, tj. sjevernjači, može se ići i s malo dužim ekspozicijama.
Naslov: Odg: O astrofotografiji
Autor: dag - 06.01.2012. u 11:35:42 sati
... S time da se ovo odnosi na žarišnu duljinu u 35mm svijetu. Kod manjih senzora treba uzeti i crop faktor u obzir.
Ne, sve ovisi samo o zarisnoj objektiva.
Naslov: Odg: O astrofotografiji
Autor: Dranve - 06.01.2012. u 13:57:09 sati
Ne, sve ovisi samo o zarisnoj objektiva.
U pravu si. Veličina senzora ne utječe na žarišnu duljinu već na vidno polje...
Naslov: Odg: O astrofotografiji
Autor: Bobo - 06.01.2012. u 15:07:56 sati
Koristan članak. Svaka čast.

Možda ne bi bilo loše da spomeneš "pravilo 600" kod određivanja maksimalne duljine ekspozicije, a da zvijezde i dalje ostanu točkaste izvori na fotki, bez tragova (tj. trailsa).

Tekst koji sam pisao se odnosi na to kako snimiti tragove zvijezda, a ne kako ih izbjeći  :wink:
Naslov: Odg: O astrofotografiji
Autor: Dranve - 06.01.2012. u 18:34:33 sati
Mea culpa.

Spomenuo sam to jer ja najčešće kad snimam startrailse idem s opcijom maksimalne "točkaste ekspozicije" za pojedinačne fotke. To mi na kraju ostavlja dvije opcije - jednu da imam pojedinačne fotke s točkastim zvijezdama (ako mi se takva fotka više sviđa ili ako uleti neki meteor) i drugu opciju da sve te "točkaste" spojim u startrailse...

Na kraju, sve je to stvar ukusa, a o ukusima se ne raspravlja... :)

Evo primjera:
- točkaste zvijezde:
(http://farm7.static.flickr.com/6071/6101298364_fd0285fdbb_m_d.jpg) (http://www.flickr.com/photos/dranve/6101298364/)

- spojeno u startrails:
(http://farm7.static.flickr.com/6062/6101392006_ce046629ac_m_d.jpg) (http://www.flickr.com/photos/dranve/6101392006/)

Naslov: Odg: O astrofotografiji
Autor: Todor - 06.01.2012. u 22:03:01 sati
i drugu opciju da sve te "točkaste" spojim u startrailse...

Vraški zanimljivo. A pošto još nisam čuo za to meni je i vraški originalno.  [71*
Naslov: Odg: O astrofotografiji
Autor: dag - 06.01.2012. u 22:52:27 sati
Nije to neka novost, taj program postoji vec dugo.
Naslov: Odg: O astrofotografiji
Autor: Todor - 07.01.2012. u 09:59:04 sati
Nije to neka novost, taj program postoji vec dugo.

Ja sam čuo da ljudi rade kratke crtice i onda spajaju to s programom u više-manje neprekidne startrailse. Meni je novost da netko to radi s točkastim zvijezdama  :wink:
Naslov: Odg: O astrofotografiji
Autor: Dranve - 07.01.2012. u 10:07:06 sati
Ja sam čuo da ljudi rade kratke crtice i onda spajaju to s programom u više-manje neprekidne startrailse. Meni je novost da netko to radi s točkastim zvijezdama  :wink:

Nemreš vjerovati kakvih sve čudaka ima...  :lol:
Naslov: Odg: O astrofotografiji
Autor: Tvrtko - 07.01.2012. u 10:10:49 sati
Ma, radial blur u photoshopu. Treba ti jedna slika i gotov si za sekundu. Ak to nije dosta, odeš u pathove, potegneš par koncentričnih kružnica, stroke path, izrežeš di treba, gotovo  :mrgreen:
Naslov: Odg: O astrofotografiji
Autor: dag - 07.01.2012. u 10:17:01 sati
Ja sam čuo da ljudi rade kratke crtice i onda spajaju to s programom u više-manje neprekidne startrailse. Meni je novost da netko to radi s točkastim zvijezdama  :wink:
E da, to je tocno.
Naslov: Odg: O astrofotografiji
Autor: Bobo - 08.01.2012. u 13:33:04 sati
Super fotka dranve! Pa dobro, mislim da je za star trailse ipak dovoljno raditi ekspozicije do 30s, što je obično maksimum koji se može programirati u fotoaparatu. S time se niti ne dobiju neke velike crtice - u svakom slučaju nisu tolika smetnja na malim fotografijama kakve obično gledamo na ekranu.

Dranve, fotku star trailsa sam ulinkao u tekst na svom webu, nadam se da je to ok?
Naslov: Odg: O astrofotografiji
Autor: Dranve - 13.01.2012. u 20:53:10 sati
Super fotka dranve!
Hvala ti...

Dranve, fotku star trailsa sam ulinkao u tekst na svom webu, nadam se da je to ok?
Naravno da je OK. Dapače... (yes little duck)  :D
Naslov: Odg: O astrofotografiji
Autor: Bobo - 14.01.2012. u 08:42:03 sati
Naravno da je OK. Dapače... (yes little duck)  :D

Super, hvala, to je baš ono što mi je trebalo za tekst :)
Naslov: Odg: O astrofotografiji
Autor: Acheron - 19.08.2012. u 22:50:33 sati
Postoji li neki program koji će dobro stackirati fotke snimljene bez praćenja, s stativa? Ili ima neka novija verzija DSS koja to može?
Bilo bi super da je program freeware ili barem potpuno funkcionalan u demo verziji.
Naslov: Odg: O astrofotografiji
Autor: dag - 20.08.2012. u 00:45:42 sati
I zvijezde-crtice pretvoriti u zvijezde-tockice?
Naslov: Odg: O astrofotografiji
Autor: Acheron - 20.08.2012. u 00:51:09 sati
ekspozicija je 10 sekundi pa su te crtice minimalne
Naslov: Odg: O astrofotografiji
Autor: dag - 20.08.2012. u 01:02:31 sati
A DSS nece?
Naslov: Odg: O astrofotografiji
Autor: HrAstro - 20.08.2012. u 01:06:14 sati
Hmmmmm.... ja sam danas s Katarinom stackirao fotke sa njezina fotića u DSSu i sve 5!
Naslov: Odg: O astrofotografiji
Autor: Acheron - 20.08.2012. u 01:31:21 sati
Koje postavke?
Naslov: Odg: O astrofotografiji
Autor: Acheron - 24.01.2016. u 22:29:10 sati
Što se dogodi kada ljudi pretjeraju

Reakcija na http://apod.nasa.gov/apod/ap160122.html

Social Media Attention vs. The Wonder of Science
(the story of the faked APOD)

The world of amateur astronomy is an awesome place where people are generally friendly and helpful. The images produced by today’s amateur equipment far exceed the quality and resolution of professional NASA or Observatory images of the 60s, 70s and 80s. It is absolutely amazing what you can capture using readily available and inexpensive cameras, software and telescopic equipment from your backyard or schoolyard if you devote just a little time to learning the ropes.

Social media has also exploded with fantastic quality images and movies from amateurs all over the world who no longer have to wait for the latest issue of their favorite astronomy magazine to see what everyone else is doing. It’s instantaneous satisfaction in a “Kardashian culture” of consumerism. Along with the readily available exceptional images on social media has come an extreme desire among some of our community to “get noticed” or to have your image published in magazines or on important websites.

APOD (Astronomy Picture of the Day) is a NASA ran website featuring the best of the best images from professionals and amateurs alike chosen from thousands of submissions weekly to highlight the absolute wonder and fascination with the heavens. Getting your image featured as an APOD is the “holy grail” for amateur astronomers and really tells everyone in the community that you are “legit” and you have arrived on the scene.

Human nature has, of course, reared it’s ugly head in this hobby like any other and recently an image and video featured as the APOD on Jan 22nd, 2016 has sparked a great deal of controversy among the people who know these things as it seems to be clearly manipulated and faked, or at the very least, processed far beyond what is acceptable in the community as a real image.

The drive and decisions by the author are in question and one has to wonder, have we gotten this self absorbed and forgotten what this hobby is really about so much that we will now simply concoct some fantastic image in order to get more exposure as a featured APOD.? Are the quality controls so lax or has the hobby gotten so refined that even the people over at APOD could be duped by such an obviously “photoshopped” image?

A little background; The International Space Station is an orbiting science platform that makes a complete rotation around the Earth approximately every 90 minutes. It is a large and very picturesque satellite that gives ample opportunity for viewing and imaging from Earthbound telescopes, cameras and eyeballs. The satellite routinely crosses in front of the Sun, Moon, Planets and other celestial objects creating an opportunity to film a beautiful movie showing the ISS and the object in the same image. These events are called “transits” and are predicted with exact accuracy by a fantastically functional website at Calsky.com and in many astronomy software packages like Stellarium, etc.

Anyone on Earth can simply type in their location and get a complete list of every time the ISS, or any other satellite, will cross their field of view or transit an object in their sky.

Catching these “ISS transits” has been a very competitive endeavor, which has addicted many an amateur astronomer. The frustration involved can be overwhelming but the payback from successfully capturing these events is enormous and has created an extreme desire to be the one who gets the best transit image.

I myself gained a lot of popularity and cemented my position as an astronomy lecturer mainly due to the organizer of NEAF at the time, Alan Traino, noticing one of my ISS solar transits on Facebook in 2009. After publishing that image freely on the internet, my popularity increased by 1000% overnight and the next thing I knew, people were requesting me to come to their events to talk about my Solar Astronomy Outreach program -The Charlie Bates Solar Astronomy Project- and actually asking ME to come lecture on solar imaging. The power of capturing the ISS transit is clear in the community.

One of the most popular imagers out there, Thierry LeGault (France) was propelled to astronomy nerd stardom by his (almost) unbelievable DSLR captures of the ISS/Space Shuttle transiting the Sun and Moon. I must admit, I get very excited when Calsky.com tells me that a Solar or Lunar transit is coming up in my area.

Now, back to the story. An image and video submitted to APOD by a young astronomer in Germany recently caught the attention of the social media machine. His post on his own Facebook page had over 150,000 views and shares within a few hours and it was chosen by the APOD team as the Astronomy Picture of the Day for Jan 22nd, 2016 after he submitted it to them for review.

APOD listed in the description “On January 15, the well-timed capture from a site near Dulmen, Germany required telescope… (sic) …with one frame showing the station directly in front of the ringed gas giant.”

Almost immediately, seasoned planetary and ISS imagers in the community started pointing out that there was surely something “not right” with this image. I was attracted to a discussion on Facebook amongst two of the most knowledgeable astronomers in my local community and decided to investigate the image and the stated conditions under which it was taken.

This was indeed not a “well timed capture” but a composite of several different videos at different times manipulated to show a transit at an impossible level of detail.

It didn’t take long for me to notice first off that this video was supposedly taken 2 minutes after sunrise in his community. This sparked my interest as Saturn was on the Eastern side of the sky when this occurred and I knew from years of experience that there is no way any piece of equipment could get such a dark, noiseless background and such vibrant colors and resolution of Saturn in broad daylight. So, I investigated further.

From the authors own information it listed that The ISS was 24.1 arcseconds in apparent size during the transit. He also said that Saturn was 27 arcseconds in diameter at the time. This is, of course, impossible, as Saturn never gets larger than 21.37 arcseconds in apparent diameter. In fact, at the time of this transit, Saturn was just 15.6 arcseconds in size.

So, what does this mean in English? The ISS was in reality almost twice as big in the sky as Saturn at the time of this transit yet the image and video showed it being smaller than Saturn. This was a sure sign of something indeed being “not right” with this APOD. Maybe he mistyped the angular sizes, whatever, this is only one of the several problems with this image stated online by some of the world's best planetary imagers.

The author also stated that he used a 42 frame per second exposure time during a .02 second transit. Anyone who has ever imaged Saturn even in the middle of the night in the darkest of skies knows that there is no way you could possibly capture that amount of color detail in a live view video with a 23 millisecond exposure time. Using this exposure time in a daylight sky would yield nothing but noise and possibly a little bit of the ISS’s grainy silhouette but definitely not a super black background and a perfectly resolved color image of both the ISS and Saturn through a 10 inch Newtonian telescope like the one the author says he used or any other telescope for that matter. It simply isn’t possible.

While researching the event even more, it became apparent from many discrepancies that this image was not a good old fashioned ISS transit capture from a humble astronomer but a cobbled together composite video and image manipulated and created by software to greatly enhance the details and place the ISS artificially right in the middle of Saturn simply to compete for another APOD award. When you go to the author’s website you find that he also sells his prints of astronomical images so the APOD would generate another couple hundred thousand hits and possibly a new batch of sales for his images. Making a buck is not a crime but creating images that aren’t real to make a buck is surely not something that I am in favor of.

Speaking of the author’s website, he is definitely an accomplished imager and the vast majority of the images he has listed for sale and for show on his site are quite beautiful and authentic. It made me wonder what could possibly motivate someone with such talent to artificially create this image….and then I remembered human nature and the quest for fame. This coupled with the desire to make money was surely at the root of this fraud.

This entire episode brings into the limelight the not so productive process by which these APODs are chosen. In order to be considered for placement as an APOD, an imager must send an email to the authors containing the image. This sounds simple enough but when you combine that with the overwhelming desire amongst a fraction of our community to get published or to be instantaneously transformed into a celebrity through astro-imaging, you get the system we have now for APODs.

There are a great deal of astronomers, myself included, who simply are not interested in being featured on these sites or in these magazines. The payback in freely sharing our astronomical images is in the fact that other people enjoy them and it spreads the wonder of science. Our society is sorely in need of inspiration in space exploration and the sciences and the best way to spark that is to simply share these beautiful images freely, without copyright in an attempt to get some young mind interested in space. Or even better, set up your equipment in public places or at schools and let the non-astronomer get exposed to our wonderful hobby through hands on participation. That’s what it is all about for me, your mileage may vary.

Unfortunately, the competitive aspect of our hobby has created a subculture of “get published at any cost” and the APOD submission system feeds right in to this desire. There is a great propensity among the people who have prioritized getting noticed to submit these images through their email procedure thereby flooding the entrants pool to overwhelmingly people who have arguably lost the real importance and meaning of the hobby.

Perhaps if these authors actually searched the internet for their daily image, like we do at solarastronomy.org, instead of relying on the email system to hand it to them, the propensity for people to fake or overly enhance images would be less. I don’t know. I do know that this entire episode has left a black eye on the hobby and highlighted to what extent people will go in order to get attention even when their actual untouched images are beautiful.


Manipulating an image through post processing in order to enhance the existing details is one thing. Constructing an image or video from separate and unrelated videos is something that we, as members of the community, have to put a limit on unless we want to see nothing but fantastical Final Cut Pro files instead of the much more impressive actual beauty of space.

Stephen W. Ramsden
Amateur Astronomer


Ovo su meteorološki uvijeti s lokacije i vremena snimanja
(http://i.imgur.com/f6pdWqt.jpg)

Naslov: Odg: O astrofotografiji
Autor: dag - 24.01.2016. u 22:44:19 sati
Dobro je napisao  [71*
Naslov: Odg: O astrofotografiji
Autor: Zocky - 25.01.2016. u 00:17:29 sati
Podugačak članak, ali je svaka na mjestu.
Naslov: Odg: O astrofotografiji
Autor: Beorn - 25.01.2016. u 00:20:10 sati
Naročito četvrti pasus od kraja.  [71*
Naslov: Odg: O astrofotografiji
Autor: mrworf - 25.01.2016. u 00:48:45 sati
Imam tog lika ne fejsu već neko vrijeme, lagano je egoističan, i kada sam u punoj kvaliteti vidio taj video, bio je jednostavno predobar da se u meni javila neka sumnja... ali nisam reagirao..
Naslov: Odg: O astrofotografiji
Autor: orion69 - 25.01.2016. u 00:55:49 sati
Očigledno je da nema nikakvog kriterija za izbor APOD-a.
Naslov: Odg: O astrofotografiji
Autor: mrworf - 25.01.2016. u 01:07:01 sati
Hahaha lik je izbrisao video i komentare na to! Klošar!  :204:
Naslov: Odg: O astrofotografiji
Autor: Acheron - 26.01.2016. u 13:30:25 sati
Autor namještaljke se javno ispričao

Great to hear that APOD has finally taken down the fake pic of the Saturn-ISS transit of Jan. 22nd. The photographer Julian Wessel has apologised again, here's his latest apology:

Hello,
I just wanted to say that I'm very sorry about what happened the last days. My picture was a fake and a huge mistake. There is nothing that can apologize that. And I can understand the hate that is going on against me. It is my fault that I'm going through hard times now. I've deleted all pictures from my Website etc at which it wasn't clear where it's from and how they processed. I didn't want to disrespect or betray you at this point I had just my interests in mind. This is a shame I know.
But now I have to move on.
Pleace try to accept this apology.
Julian.


A ovako stvarno izgleda tranzit ISS-a preko Saturna

[youtube]http://www.youtube.com/watch?v=tB76_hubraI[/youtube]
Naslov: Odg: O astrofotografiji
Autor: Acheron - 04.04.2017. u 18:08:23 sati
Molio bih vas koji post ohrabrenja za HrAstra kako bi što prije obradio fotku. Čovjek ima par sati ekspozicija M81 i M82 sa krasnim detaljima, čak se naziru i... e neću spojlat :zubo:
Naslov: Odg: O astrofotografiji
Autor: Danijel - 04.04.2017. u 18:23:17 sati
Daj HrAstro, ti to možeš, nije to tako strašno. Znaš da to tebi ide! :hopla: :204: [10* :106:
Naslov: Odg: O astrofotografiji
Autor: zackozgb - 04.04.2017. u 18:56:16 sati
Ajmo HrAstro  :204:
[youtube]http://www.youtube.com/watch?v=27Fd4qNMtgI&feature=youtu.be[/youtube]
Naslov: Odg: O astrofotografiji
Autor: HrAstro - 04.04.2017. u 21:42:08 sati
Popizdio sam i sve pobrisao [emoji14]

Sent from my Redmi Note 3 using Tapatalk

Naslov: Odg: O astrofotografiji
Autor: Zocky - 05.04.2017. u 18:30:23 sati
HrAst se boji pokazati fotke snimljene novom kamerom :zubo:
Naslov: Odg: O astrofotografiji
Autor: mrworf - 05.04.2017. u 20:25:57 sati
No daj ajde, kako ti nije bed naz držati u takvoj neizvjesnosti?  :204:
Naslov: Odg: O astrofotografiji
Autor: Beorn - 05.04.2017. u 21:29:40 sati
E
Naslov: Odg: O astrofotografiji
Autor: Bobo - 10.05.2017. u 07:16:04 sati
Evo jedan odličan tekst o DSLR asrofotografiji i ISO vrijednostima. Ima dobrih test fotografija uz objašnjenje kako sami možete testirati aparat. Usput je i zorno prikazano zašto Canoni nisu baš najbolji izbor za astrofotografiju (ISO invariance)  :76:

http://www.lonelyspeck.com/how-to-find-the-best-iso-for-astrophotography-dynamic-range-and-noise/
Naslov: Odg: O astrofotografiji
Autor: davor - 11.05.2017. u 07:52:53 sati
... Usput je i zorno prikazano zašto Canoni nisu baš najbolji izbor za astrofotografiju (ISO invariance)  :76:
.....

 :287: