This afternoon I was stripping an old Pentagon lens when two of the aperture blades sprang out of the lens. After several attempts at putting them back without fail the whole lot nearly ended in the bin. That evening came across your wonderful video and watched every second of it. Beautifully explained through every stage and now I am ready to have a more informed go at it. Thankyou. Ken

because i had a sticky tessar i had no choice but to attempt this cleaning...i know i would not have been able to do it without your video so Thank You for doing it...the lens leaf part was the most difficult to do; they jump off with the slightest nudge...i never want to do this again LOL...

Superb! The way you talk it through is super helpful - so many of these videos are just speeded up and almost impossible to follow - I have a Pancolar with a stuck aperture that I'm plucking up the courage to tackle - your video will be extremely helpful as these lenses are very similar.

Great info. 👍

Thanks for this video. It's great to see someone actually working on repairing lenses. I think people are normally terrified of opening up a lens. A while back I picked up a box of CCTV lenses for cheap. I bought the box for a couple manual aperture lenses that were in the box, but I also got a small pile of lenses with electronic aperture control that are basically useless on anything but a CCTV camera. With nothing to lose, I took them apart to remove the iris mechanisms. Being able to go into a lens without fear of damaging a good lens really helped with my confidence, and understanding the anatomy of a lens has been helpful too. I'd recommend that anyone that wants to get into repairing lenses start by finding some cheap CCTV lenses and taking them apart.

You should compare the images with room lighting on items, and not landscape. The light differs in times which is meaningless.

cAn you repair my old lenses? czj and takumar. what is your email ?