MRPS The Night Sky Presentation 20210510 - Stan Mansas

Camera Settings to minimise Star Trails:
500/400 Rule
CAMERA SETTINGS
The rule of 500 can be used to calculate the exposure time for
your images.
Simply take 500, divided by the focal length of your lens, to get
the number of seconds to expose the shot.
Example: If you’re using a 20mm focal length, take 500, divided
by 20 = 25 seconds per exposure
Full frame: 500/20mm = 25s
Cropped: 500/(crop factor 1.6 X focal) eg. = 15.6s
This method will give you long enough exposure to get good
quality images at night without minimal star trails
Background Image: Stellarium