(This video is from a simulation produced by Niels Noordhoek.)
A new telescope focusing mask. Perfect focus is achieved when the diffraction spikes and dots on the left match the spikes on the right. Watch the small green dots as an example.
This website explains how the Carey Mask works. http://www.btinternet.com/~gfcarey/careymask.htm
Nice alternative to the Bahtinov. You should have someone manufacture and sell them.
highwayman7 9 months ago