Evening all!
I need to call upon the collective wisdom that is TP
The other day, after having received a lens I purchased from an online retailer that had some fungus in it, I felt compelled to check my collection of lenses for fungus. This is something I had never done before, and in any case I am thankful to report that none were affected. Happy days.
However.
At some point during taking the lenses apart, to get the best view through each cell, an adjustment shim fell out and onto the floor. Of course, I didn’t notice this at the time, and put everything back together and put all the lenses back in the bag. Some days later I find said ring on the floor and hazard a guess that it was from a lens. Now, a few simple observations later:
I only have lenses with either copal 0 or 1 shutters, and said ring does not fit the 0 shutters or cells. Good start. I then have two copal 1 shutters, and it fits quite perfectly onto the threads of the front cell of a copal 1 shutter. This is too much of a coincidence to not be a lens shim, I have therefore convinced myself. So how do I know what lens it came from? The only indication I have is that one lens had some black dirt around where the shim would sit that wiped off on my finger, whereas the shim was clean, so likely not from that lens. Also, when installed into the dirty shutter, let’s call it, tightening the cell onto the shutter just didn’t feel right, or at least how I vaguely remember it feeling. As unreliable as that may be, I’m fairly happy the shim is now back on the correct lens.
In any case, I have a few questions:
Is there any way to find out with any certainty which lens it came from, and, given that the shim is probably 150-200 microns thick (at a guess), how much of a difference does it really make?
As always, any help would be very much appreciated!
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