a 36 push on filters

I have the yellow one, and it fits my 50/3.5, 35/3.5, 90/4 Elmars, the I-22 and the 50/2 Summar.
 
The 50/3.5 & 35/3.5 Elmars are both A36, as is the I-22 copy, since there is no filter thread at all. The Summar and 90/4 Elmar both have 34mm sized threads.
 
I have the A-36 filters in yellow, orange, green & red. I also have taken a bad skylight A-36 filter, removed the glass and secured a 40.5 - 49mm step-up adapter to it. It permits me to use 49mm filters and hoods on my Elmars, Hektors & Summaron. I'm thinking of making another adapter for either 43mm or 46mm accessories. Some 49mm hoods blocks the rangefinder on my SM Leicas while the smaller ones shouldn't.

Walker
 
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