DIY Add on diopter

Started 6 months ago | Discussions thread
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dickiedoo
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DIY Add on diopter
6 months ago

I had a friend give me an old lens,,,a Kiron...... f3.8 - 5.6......28-210mm. The outer shell/tube/barrel whatever you call it was pretty badly beaten up and I didn't have any use for it.My curiosity got to boiling and I disassembled it,,,,didn't find anything I might use inside but the main lens assembly,a metal tube about an 1 1/4" long and 3/4" diameter with glass in both ends.It looks like a front lens off of a microscope. This thing by itself is a very powerful magnifier,I could fashion a mount from an old lens cap and filter ring and make a add on diopter,don't have a clue if it could find a focus point or be clear etc etc etc but I think I'll give it a try. I'm sure it will have a vignette problem but might be okay for little guys smaller than fleas if it will focus.

I did an assembly of the above a little while ago and it will focus,vignette was not a problem but the image is cloudy and if that can't be fixed then it's history and a new toy for the grandkids. I'm not sure how it compares to a R 250 with out getting a fix on the cloudiness so sharp focus could be seen and tweaked. It's crystal clear by itself but when coupled with the glass in the SX50 it becomes cloudy.

dickiedoo

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