Starry night above Bear Lake

[Chipe]

I was recently on vacation. I was not the only photographer up there. My brother, who majored in Japanese language had a friend from Japan come up there who is also a photographer. Though his english was not all that great we still shared the common language of photography. I decided to share some of the things I knew with him. We went out on the beach one night around midnight and did some night exposures. Here is one I took. This is a 15" exposure at f5.6 with an ISO of 2500

http://i526.photobucket.com/albums/cc342/chipe13/IMG_4987.jpg

I will be posting another on I did for questioning because it turned out way noisy and I want to know if any of you would know why. It was an hour long exposure at ISO 100 f22. When I looked at the photo after, it was extremely noisy and I had no clue why because it was ISO 100. I didnt do another long exposure like that. But it was clearly very noisy. I will post that up here on this thread soon so you can see what I am talking about. But with such low ISO I have no clue why it would give such great noise. Any ideas before I post the photo?

[JohnB]

Nice work, Chase!

Your sensor gets pretty warm when being used for that long. What you probably have is noise from a hot sensor. Just curious.... Why were you shooting with such a narrow aperture? f/11 should have been sufficient to get sharpness throughout the whole shot. Many lenses degrade in quality at their extreme apertures (f/1.8 or f/22)

[jrome]

Nice shot, I can tell there's a lot of noise in it though. How did you get such a long exposure without star trails? UWA lens? I've recently got into astrophotography and found that it's a lot of fun. I shoot at 24mm f/5.6 for 25 second increments and stack 30 shots together. If you ever want to get into it, check out Deep Sky Stacker (DSS). Interesting stuff. When I get a chance I'll post a couple pics I've done.