A346Dude
Topic Author
Posts: 1161
Joined: Tue Nov 30, 2004 11:23 am

Question: Canon D30 Night Exposures

Tue Dec 14, 2004 10:40 am

I am thinking about purchasing a used Canon D30. The one question I have relates to this camera's performance during night exposures.

I want to be able to use this camera for astrophotography, as well as for night exposures of aircraft, so I will need to be able to take exposures of about 30 seconds at maybe ISO 400. What can I expect from this camera in terms of noise at these settings? For example, how does it compare in this respect to today's DSLRs like the 300D, and also to something like what I use now, a low-megapixel P&S?

If anyone has any sample pictures they would like to share, I would appreciate that as well.

Thanks for your help.
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digby
Posts: 171
Joined: Mon Jun 05, 2000 1:06 am

RE: Question: Canon D30 Night Exposures

Fri Dec 17, 2004 5:29 pm

HI,
I used to own the D30 and took many a long exposure with it, although I don't remember ever taking astrophotography with it. I have since tried astrophotography with my new 20D and have been happy, but not impressed with the performance. I think it's an owner/operator problem rather than equipment.

Long exposures with D30:


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Click here for bigger photo!

Photo © David Morrell - Avid Creations
View Large View Medium
Click here for bigger photo!

Photo © David Morrell - Avid Creations



Long exposure with 20D... mind you I didn't know what I was doing at the time. Do you have any tips and hints for getting the stars right. The exposure was about 15 minutes.



Cheers

David.M.
Friends don't let friends shoot Nikon!
 
A346Dude
Topic Author
Posts: 1161
Joined: Tue Nov 30, 2004 11:23 am

RE: Question: Canon D30 Night Exposures

Fri Dec 17, 2004 10:09 pm

David,

Thanks for those photos and for the info.

As for your star trail photo, I think I can help you out. While film cameras can take a star trail photo of many hours when the conditions are right, digital cameras (at least today) have too much noise when the exposure reaches more than about a minute.

I have read in an astronomy magazine, however, about a technique for using a DSLR to take star trail photos. Basically, you take a series of 1 minute exposures, with as little gap between each shot as possible (hopefully about a second or less). Then you merge them together using Photoshop (I'm not sure of the exact technique since I don't have PS). Apparently, this technique can yield even better results than film due to the fact that stray light does not build up as with film.

If you want more info about this technique, I can try and find that article.

Dustin
You know the gear is up and locked when it takes full throttle to taxi to the terminal.
 
manzoori
Posts: 1459
Joined: Sun Sep 22, 2002 7:08 am

RE: Question: Canon D30 Night Exposures

Fri Dec 17, 2004 10:10 pm

Isn't there something about taking a second exposure of the same duration as the first but with the lens cap on so that one is subtracted from the other to reduce the noise?

(runs off to search Google)

Here ya go, Dan Heller's Tutorial on shooting star trails

Hope that helps!

Rez
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