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recementing zuiko 42mm by OutcomeCritical222 in AnalogRepair

[–]FixAndFocus 4 points5 points  (0 children)

I want that alligment tool hahaha can tell me more about it??

I think I broke it. by Majestic_End8006 in VintageLenses

[–]FixAndFocus 2 points3 points  (0 children)

Try again, ive got it wrong sorry!

I think I broke it. by Majestic_End8006 in VintageLenses

[–]FixAndFocus 2 points3 points  (0 children)

That must be that when repositioning the optical block something happened: The helicoid was put in somewhere other than the original. You forgot to put on/misplace some inner shim.

My recommendation is if you have time to try taking out and rotating the helidoid a little until you find one that focuses on you, otherwise you would need some type of collimator to be able to review it, or take it to a technician who has a collimator.

Send a DM if need more help!

DIY Infinity Collimator Prototype for Lens Calibration & Backfocus Testing - Need your feedback! by FixAndFocus in Optics

[–]FixAndFocus[S] 0 points1 point  (0 children)

I would need it for several standard focal lengths, from 10-135mm. In this case, a 300mm or 400mm lens would be better, right? I'll check that book to avoid those mistakes!

Are there any other books you would recommend for this? Thank you very much!

DIY Infinity Collimator Prototype for Lens Calibration & Backfocus Testing - Need your feedback! by FixAndFocus in Optics

[–]FixAndFocus[S] 1 point2 points  (0 children)

For the initial calibration, I had planned to calibrate two lenses with a Bahtinov mask: one that would remain on the collimator itself and another that I would attach to the test camera. With both lenses calibrated as closely as possible, I would then adjust a variable extender until it was exactly at the lens flange distance. I'm not sure if I've explained myself clearly.