PDA

View Full Version : Orion Nebula thru Soup w/ 20D

Deckyon
15th of January 2005 (Sat), 09:57
The lack of noise in long exposures on the 20D is phonomenal. While I bought the camera as a backup for my 1D, it has now become my primary astrophotography camera. It has already proven itself in a shot-by-shot comparison against the Nikon D70, but this is just awesome. Check this out.

Last night is the first time I have been able to go to our observatory where we could actually see stars. Even so, it was very hazy and clouds rolled in in the middle of shooting. Below is the best shot of the night, even though the telescope focus was a bit off.

http://gallery.louisville-astro.org/album/bradsDSO/Orion.jpg

Canon EOS 20D w/ T Ring Adapter
Meade LX200 12" Telescope
ISO 200
Shutter: Bulb for 7.5 minutes
No Noise Reduction
No Post Processing (no computer editing, besides resize and crop)
Not bad considering conditions.
defordphoto
15th of January 2005 (Sat), 10:00
Looks like the scope wasn't tracking right on the mark also, but that is quite impressive!!!
pcasciola
15th of January 2005 (Sat), 10:41
Looks like the scope wasn't tracking right on the mark also, but that is quite impressive!!! That's not good tracking?!?!?! That's about the best I've seen from a sub-$10,000 scope with a single exposure of 7-1/2 minutes.

Deckyon, I did some tests a while ago preparing to do some astrophotography as well with my 20D on a 9" SCT, and at ISO 100 and 200 the lack of noise is very impressive. I was able to go 10 minutes without much noise, and only a few small hot pixel areas which could easily be edited out. I've been trying to shoot Comet Machholz which should still be pretty bright at around a 4 magnitude, but we literally have not had decent seeing for over 2 weeks here in N.J.
boone
15th of January 2005 (Sat), 11:10
Nice shot of the nebula! I will save my pennies for a 20D.

I shot Comet Machholz with my DRebel last week through my 100mm f/2.8 lens. Not too bad, but I didn't have a scope to track it, so I shot at ISO 3200 and it is pretty noisy. Anyone have any Photoshop tips for getting rid of the astrophoto noise when you don't have multiple exposures to stack?

http://boonedocks.net/pa/pa.php?p:717:m:39
pcasciola
15th of January 2005 (Sat), 11:38
boone, nice shot of Machholz there. Looks like you took that picture on the same night I did manage to finally see it, because it was right next to the Pleiades when I saw it as well, but it was 1AM when it cleared up and too late to start setting up my telescope. I should have took a shot with the 300mm though, but I am currently tripod-less.