btaylor - speak for yourself.
Few lenses are designed for rear filters - potentially even more image-degrading. Gels per se are prone to grime build-up, fingerprints, creases, scratching, and certainly aren't cheap anymore. Old ones might be partially faded. I never use gels except in the lab/studio.
I have 3 EL-Nikkor enlarging lenses that are supposed to be 39mm. My caliper measured them all differently.
You cannot reliably measure thread diameters by applying calipers to the outside of the thread.
I had never heard of the technique that @tih mentions above. I think that level of accuracy would be important if one were trying to mount lens cells into a shutter.
I'm not sure how much labor is involved on the coding side, but this site could use a "like" button for situations where a user replies with valid info for another user. "Like" would acknowledge that that the info has been read and appreciated without creating a whole new reply. I guess this does open the argument for a "dislike" button as well.
How far have we derailed the OP's thread now? Ha ha.
We have decided in the past that it is better not to have "like" buttons, but rather encourage people to manually post their reactions.
it sometimes does generate written replies that add to the thread.
Unfortunately, I think it also generates work for the mods sometimes, when folks are, um, less than tactful in posting their reactions...
I'd send the lens back to KEH. Who's the lens manufacturer?
Hey y’all.
I’ve got some concern over a couple of my lenses. My 210mm seems to have issues with the shutter. Occasionally when firing on slower shutter speeds I can notice my shutter not firing at all or firing very quickly. Is there a way to fix this or do I need to send it back to KEH, or the manufacturer? We don’t have anybody that I know of in town who works on large format lenses.
I am borrowing a lens from someone and it has an “M” and an “X” setting on it. It doesn’t do anything I can notice and he doesn’t know what it does either. It’s a Komura 300mm if that matters.
Regarding the M and X settings on the Komura, as mentioned, that control is for setting flash synchronization with either a bulb flash (M) or electronic flash (X).
You won’t be able to tell the difference by just looking through the lens and firing the shutter without a flash attached.
The M setting delays the shutter action by a few milliseconds to allow time for a flash bulb to get to its full brightness. X allows the shutter to fire immediately.
If you aren’t using a flash, it doesn’t really matter which one is selected, though I’d leave it on X.
It's the other way around. The M setting doesn't delay the shutter action, but triggers the flash milliseconds before the shutter opens.
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