Originally posted by glinda This in fascinating to me , how did you alter the 110 lens, i have the 50/2.8 but there’s no aperture rings on these otherwise great little lenses — wide open all the time if I remember correctly. On the fuji.
Hi. I altered the 18 by opening it up - 3 screws if memory serves me correctly - and then I added a home-made aperture disc between the front element group and the rear.
It was a piece of black electrical tape (almost matte) and the hole for the diaphragm was made with a hole hobby shop/crafts shop hole punch that I bought especially for this use. It had about the hole size that I was wanting (maybe f/8++) and it was less than 4€, so why not. Easier than trying to cut a hole by hand with an Exacto blade.
I positioned at center as best that I could eye it and then reassembled. Ta da! And just FYI, I tried an experiment where I added an addition aperture disc stuck to the outside of the rear element. No good. Lot more hard vignette than I wanted.
My next project will be to try the same internal aperture disc with my second copy of the Pentax-110 50/2.8 lens ... I will post later on results once done & tested. Cheers, J