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Message: <blockquote data-quote="CliveP" data-source="post: 3417149" data-attributes="member: 85835">Just remembered something else in this case which could be quite significant. It came to me while making  a brew and having another quick glance through the Pentax.Eye sockets and eyecups.These compact Pentax don't have the softest and most comfortable and easy to align eyecups which means that I perhaps hold them somewhat askew pressed against my eyesockets -I think the eyelid bones- and I'm pretty sure they (my eyesockets) aren't 3 axis collimated. So this effect is much more prominent with small bins such as these.So could it in fact be better for me to have aligned the bins according not only my own eyes but the sockets also and that if I did have them theorically correctly lab corrected that they could in fact be less good for me than my own personal real life bins to my eyes outdoors settings?I think this could be true. You may add this as an appendix Bill. I did just read your chapter on collimation and yes there are many folks who would make incorrect claims perhaps. Phew I'm glad I did not do that. I would have been embarrassed but most people I imagine don't care really anyway and will use any old rubbish bin. Freedom to choose but yes it would be incorrect to say that just twisting screws alone creates perfect collimation unless one were extremely fortunate to have just hit exactly on the correct setting.I hate lending bins to other people if they adjust them. Bridge ok but I know they aren't really getting the proper effect unless they fine tune the diopter also and even the eyecup positions.I did let two folks try the Pentax last evening and they had a quick look without adjusting anything and seemed satisfied but they were just passers by I got chatting to. I can't imagine they got much of a view but I am happy with this kind of quick lending if it's enough for them.</blockquote>

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