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My latest astro pic- resident photogs are gonna like this


Tractor

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This one is a very large nebula in the summer sky. So big my telescope can't see it all in one frame so....

 

I took the pic using only the canon 40D and an EF 75-300mm lens at 300mm. Its 40 1.5 minute exposers combined into a single 1 hour shot and processed like crazy to get any detail to show up. I'm actually impressed that it even worked.

 

http://i47.photobucket.com/albums/f185/EWhytsell/6992resizedweb.jpg

 

Evan

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I want to do this! I'm so fascinated by the shear size of the viewable-universe. Crazy.

 

Go for it. That pic didn't take a lot of expensive gear. Just a good camera with a shutter release cable (to lock the shutter open) and a mount that can track the stars (you could make one or buy one good enough for that type of shot pretty easily.) Other than that its a clear, dark sky, and a lot of time taking the shot and processing in photoshop. I have about 7 hours total in it and I'm still not finished with a full res printable version.

 

What I really wish I could get is something like a 70-400mm or so lens with a lower F number like around F2. This F5.6 @ 300mm isn't fun.

 

Evan

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Here's the nasa pic of what I was shooting http://apod.nasa.gov/apod/ap051206.html

 

I shot using the lens at 300mm so I only got that brighter area near the bottom in the image. When the moon moves out of the way I might try for the whole nebula using my larger aperture lens at 135mm. In reality though I'd probably need to get a hydrogen alpha filter to get much more detail.

 

I'm sure nasa ain't gonna go into the details, but I'd bet their image was done in hydrogen alpha, oxygen II, III, and likely x-ray then combined. which is cool and I'd do it if I had the filters, but I'd still be short one nice space telescope:-)

 

Evan

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