having a gun sight on the camera makes following a target super easy!
Sounds very interesting. Can you show us what you made there?
The reflex sight is an Amazon special, not the cheapest one but it's not made for a real gun. To mount it I drilled a 1/4" hole in "gun rail" which is used for mounting hardware on to guns, and ground down a 1/4-20 screw to sit as flush as possible with the top of the rail. If the head sticks up too far the sight won't mount properly. There are kits that let you mount gun rail to a hot shoe (camera flash mount) and kits that let you mount a hot shoe to a 1/4-20 hole but the taller your mounting setup the more parallax error you will get and the less stable it will all be.
Every time I shoot the sight has to be adjusted, it moves a little while being transported but mostly it's to account for the range of distances I am shooting that day. By picking a spot midway through the field and centering on that it is pretty accurate as long as I remember to aim high for close subjects and low for distant ones. If you are going to film fast moving subjects it is worth the $30.
