Did some test photos of sky with EOS350D digital camera.
All using 75-300 f/4-5.6 telephoto on objects near equator.
Max time for no trailing...
8" 75mm f/5 iso 400
4" 300mm f/5.6 iso 800
Obvious trailing...
8" 300mm f/5.6 iso 1600
I usually write a blog post about once a week. The latest post can be viewed here: Too Many Road Cones: I think it is clear, there are too many road cones! (posted 2025-07-18 at 16:55:03). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2025-06-28 An Empathy Deficit: They end up reducing the total empathy in the world..