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<blockquote data-quote="Panza" data-source="post: 582363" data-attributes="member: 28379">I was afraid the D7000 wouldn't hold up in low light as well. The artifacts in the image quality become quite present above ISO1200.&nbsp;I use StarWalk when I'm searching for the Milky Way. I've taken photos of the MWG at 16mm and 24mm with zooms but I've yet to try using telephoto lenses for smaller Galaxies. The galaxies I need to take photos of are Andromeda, Cassiopeia, Gemini, and Ursa Major. To be honest it's a project for my spouse in her college astronomy course. When she said &quot;honey I need your camera&quot;. It was no longer a project and instantly became my mission. I was afraid star trails would start appearing at 30s exposures. When I apply the 600 rule to 500mm, I get 500/600 = 1.2s exposures to avoid star trails? I'm also worried about the rotation of the earth causing issues in the stacked photos or will Photoshop/Deep Sky Stacker correct this?I've been reading on equatorial mounts and<a href="http://www.philharrington.net/scotch.htm" target="_blank">scotch barn door contraptions</a> which I'm not skilled enough to create.</blockquote>

[QUOTE="Panza, post: 582363, member: 28379"] I was afraid the D7000 wouldn't hold up in low light as well. The artifacts in the image quality become quite present above ISO1200. I use StarWalk when I'm searching for the Milky Way. I've taken photos of the MWG at 16mm and 24mm with zooms but I've yet to try using telephoto lenses for smaller Galaxies. The galaxies I need to take photos of are Andromeda, Cassiopeia, Gemini, and Ursa Major. To be honest it's a project for my spouse in her college astronomy course. When she said "honey I need your camera". It was no longer a project and instantly became my mission. I was afraid star trails would start appearing at 30s exposures. When I apply the 600 rule to 500mm, I get 500/600 = 1.2s exposures to avoid star trails? I'm also worried about the rotation of the earth causing issues in the stacked photos or will Photoshop/Deep Sky Stacker correct this? I've been reading on equatorial mounts and[URL="http://www.philharrington.net/scotch.htm"]scotch barn door contraptions[/URL] which I'm not skilled enough to create. [/QUOTE]

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