Interesting to see how that grease turns out over time. Main concern is it that when it eventually spreads out it'll thin and stop filling the gaps between the 2 parts. Second concern is that with that little grease there's nothing to keep dust and water from getting in. Looking to do my own sometime. Got it in great condition but the distance scale is moving freely.
Casey, thanks so much for showing this. Do you think this lens can be modified to be a globular lens? I have a spare copy and see if I can mod it. I would just need to put the front lens element backward. Do you think it would fit in like that?
Hi Casey, do you have a tip how to remove a branding ring that is screwed on too hard or seized. My 28mm has the ring slightly recessed and it's very hard to get it undone. Any clues?
Try putting isopropyl alcohol or hydrogen-peroxide on the threads to act like a penetrating oil and dissolve any deposits. Get a really good fitting and sticky rubber ring see if that works. If worst comes to worst, drill two small pockets on opposite sides of the ring and to a spanner wrench. That may not work as well either, I haven’t tried it myself. Good luck!
That’s a little tough to answer. I didn’t measure it when I had it apart but I’d give a rough estimate of 25mm. You could also try to calculate it based on the formula for focal length and aperture.
Each are 1” and 3/4” ID I believe. The dimensions aren’t super critical. I just bought a handful of different sizes at my local hardware store and used what fit best. Wiping them with alcohol helps them be stickier too.
Thanks Casey, I am watching this & going to do mine shortly. I have subscribed to your channel. This is very helpful as my copy has lots of oil on the blades. As a matter of interest can you please tell me the name of the person you mentioned from Denmark as it was a bit unclear. I have a lot of old lenses and he may cover some others that I need to repair. Thanks in advance Andrew
