Recently, Hemi4268 posted:

Is there a formula for relating shutter speed, maybe focal length,
and reduction in resolution in lp/mm for typical camera shake?

You can work this out by figuring the image motion in radians per
second one might get. Just use a laser pointer against a piece of
color RC paper posted on a wall in a dark room.

Process the paper and measure the movement. Do test for 1, 2 and 4
seconds.

Now all you need to do is use a number generator against the movement.

Final results will be in chance per 10 images.

So say at 100th of a second with a 100 mm lens you have 3 chances out
of ten for no motion. At 1000th of a second it's 10 out of ten. At
a 10th it might be 1 out of 10 meaning you must take 10 images to get
one with little or no motion.

I like it, even if it does seem overly optimistic!

Neil