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Message: <blockquote data-quote="CliveP" data-source="post: 3416589" data-attributes="member: 85835">Hi RonYes I would love some lab type specialist setup if that really would make a difference but in the end of the day with these roofs it's just 4 grub screws N,S,E and W more or less and and if you tighten one it moves it towards that direction or loosen it for away.With porros it's easier as you only have one screw for N & S and one for E & W.I adjusted my little reverse porro the other day a bit haphazardly but I've been using it since (although not outdoors yet) and it's great.This roof is tricky. I'm getting a good view but I think I'm still getting eyestrain and the left side still seems a bit softer so I think it's putting more strain on my right eye to focus and therefore tiring it out maybe. I still think the collimation is improved though and hope to get a try outdoors with them later today but I'm now starting to suspect it may be a problem with the objective or focussing lens on the right side and then it needs to go to Pentax.I've just done a bit of an A-B with my RSPB and I get no eyestrain with that especially on the right side and it's sharp there also so I think there is something wrong with the Pentax in that regard. It's looking like an expensive trip to Pentax after all.I've just realised I can screw the objectives off and swop them to see if it transfers the problem from the right to left side. So that's my next move. Worth a try.</blockquote>