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Hi, So I had a ring of mist on the inside of the rear glass of a vintage meyer-optik lens from the 1960's or so. I used isopropanol to remove it, it worked but also removed the coating. Never heard ...

Hi, So I bought that used lens, Carl Zeiss Jena 135mm/f3.5. In normal horizontal position or facing down the focus ring stops solid at around 15m just as it should at infinity. When I tilt the lens ...

I never understood these graphs. There were no elements concave on both sides. This is great lens btw, there are many iterations of it, the first one that I also have was not good by today ...

So I didn't clean the middle group of lenses. I am pretty happy with the clarity of the lens overall. After putting all together I have excessive softness on edges. I must have put a glass wrong way. ...

I have tried release liquid for stuck screws to no avail. It worked in other places in this lens which had been stuck too. I don't think the lens had been messed with before.

Hi So I am stripping Nikkor 43-86mm. the threaded rings are really stuck. I used a release fluid like for stuck screws on one and it worked. But nothing works on this. Any idea? I got stuck on this ...

Hi, So I have two same 2x teleconverters by Tamron. One is clear optically and one is hazed. I dismantled the hazed one. It turned out that the haze is on one glass only out of 5 or so, situated in ...

I focused on the same thing making this comparison, I'm not that stupid :) They differ in depth of field and focal length should be the same but it's not. below at f8 Nikon 12mm f8 Tokina 12mm f8

Yeah, but Tokina has better sharpness on edges. The birds' feeder should be in focus as I focused probably on the bench. I shoot mainly architecture not wildlife with wide angle.

So I have Tokina 11-16mm f2.8 DX on my cropped sensor Nikon D5500. It beats on sharpness the Nikkor 12-24mm f4 that I had earlier (I made side by side comparison). That Tokina is probably best ...

Hi, Are there good third party dumb F to Z adapters, as good with vintage manual Nikkor lenses as FTZ would be? Thanks, Andy

It looks like this teleconverter was not meant to be opened.

OK, this was all informative. So using a vintage 300mm prime manual lens would not be so easy with IBIS? I thought IBIS would be a great advantage with long manual lenses. Pity! I cannot justify ...

Rubber tool won't do it. This converter is ideal for my purposes. I need it for long manual lenses.

I cannot open it from the back. After removing all screws something inside keeps it together.

Hi, I am going to buy Z5 and I am planning to use my favourite Nikkor 24-85mm AF-S f-mount lens with it. I am going to buy an extra 24-85mm for it. Now for the best stabilization results should I ...

Hi, Thanks. The problem is that originally there are no notches or holes for any tool to open the optics. I would like to know how it is opened before forcing something here. I made notches with a ...

Hi, So I have that Nikon TC-14B AI-S teleconverter with the protruding front element. A bit dirty inside. I have no idea how to open it. I opened similar converters, they had notches around the ...