Going from 300D to 40D, good idea? How is it for astronomy photography?I've been in the market for a new camera body since my 300D's processor fried itself. How does the 40D stack up for the price? Also, I really want to get into astrophotography as well (though I know nothing about astronomy -- so that's also new to me). Is the 40D any good for that? Or should I maybe be scouring eBay for a use 20Da?from:Josh C. | 12 answers