{"pages":[{"page_name":"A-Tri-Bahtinov-Mask-for-Aiding-Collimation-and-Focusing-of-Schmidt-Cassegrain-Telescopes","title":"A Tri Bahtinov Mask for Aiding Collimation and Focusing of Schmidt Cassegrain Telescopes","summary":null,"action":"edited","sha":"6c11c411f8fb5a2e5890ccb2279f609d2498999f","html_url":"/cytan299/tribahtinov/wiki/A-Tri-Bahtinov-Mask-for-Aiding-Collimation-and-Focusing-of-Schmidt-Cassegrain-Telescopes"}]}