I have new APM 100 mm 90 deg ED binoculars and wondering how to check collimation and what are realistic expectations. I had them out the other night and with Morpheus 6.5 mm eyepieces in place, if I pulled my eyes back around 4-6", I was seeing misaligned star images that were offset mostly in the vertical axis. I randomly rotated the left Morpheus eyepiece about 60 deg in the eyepiece holder and rechecked and the alignment was much better. Maybe the eyepiece barrel is not concentric? I will try again on different targets and during the daytime as well. I didn't notice any problems while observing normally but have read that misaligned binoculars can cause eyestrain and want to check these out while still under warranty. Are there better ways to check the collimation than what I tried that can be done at home?
I have read that it might be better to collimate myself if I can get the APM collimation tool vs sending them back for collimation as they can be tuned to one's eyes and not sure if this true or not. The other thing would be if they were sent for collimation, how likely are they to stay in alignment on the return shipping trip? Thanks,
p.s. Love the binoculars! I was comparing them to my SV105 with binoviewer and really glad I took the plunge and bought the APM 100's. It is what one would expect, but using the binoculars was a joy. The fov was wider (about double) with the supplied 18mm eyepieces and stars were brighter than in the SV105/Denkmeier binoviewer/21mm Denkmeier eypeices/OCS/Powerswitch. I greatly enjoyed the widefield image correct views and 18 mm and Morpheus 6.5 mm eyepieces are both very friendly to look through as far as eye position and relief. The binoculars went deeper into star fields as one would think based on the telescope splitting the light into 2 images. The moon looked great in both but a slightly more 3d effect in the binoculars. The only edge I noticed in the SV105 was perhaps slightly less secondary color when viewing Polaris but not sure is this was due to the dimmer overall image or better color correction of the excellent LZOS lense in the SV105. More than any other instrument I have looked through, the APM 100 ED 90 degree binoculars just seemed to get out of the way and give the experience of being immersed in space taking in the sights.