- DSC05019.jpg (33.17 KiB) Viewed 1810 times
This was taken at 1/4 second at f5.6 using ISO 1600 (camera on a tripod). Lens used was a 100 - 400 mm zoom set at 400 mm.
Contrast this to a shot take not too long ago taken during the Supermoon.
- IMG_4546.jpg (38.39 KiB) Viewed 1810 times
This was taken at 1/1000 sec, f 5.6 ISO 400, camera hand held, 400 mm
Note that the difference is 10 stops, or 2^10 = 1,000 times difference in brightness between the full moon and the eclipsed moon (roughly)
For astrophotography a rule of thumb is divide 500 by the focal length used to get the longest shutter speed to use without getting major blurring due to the Earth's rotation. I used a 400 mm lens, so 500/400 gives roughly a 1 second maximum shutter. For milky way shots, if you use a 20 mm lens then 500/20 = 25, so 25 seconds would be your longest shutter duration.
Dave
