Posted By itz marcus
Ok here goes. I hope I did it right. I took an L.E.D. flashlight and covered it with an ep cover. I took a thumb tack and made the hole. I moved my scope about 150ft away.
At 225x it was very hard to make out the diffraction ring but it was there. It did seem to go all around, but as it was so faint my eyes were playing tricks and I kept thinking that the diff ring did not go quite around. I bumped it to 450x (2x barlow Knight owl) and boy was it evident that the diffraction ring DID go around the "Airy"
disc (although at that power there was some tubulance evident).
Anyway, does it sound like I did anything wrong in the artificial star set up? I only tested at focus (although the few seconds that I did an out of focus test the in and out images looked good but I didn't concentrate on them)