50mm Nikkor f:1.8 goes for well under 100 beer tokens, even allowing for buying an adapter. It's much smaller than my equivalent Takumar.
I have this lens and have been meaning to get an adapter. Thanks for the recommendation.
What adapter did you get?
Short of a rangefinder lens, to my knowledge the smallest 50mm is the OM Zuiko 50mm f1.8. I have the f1.4 and even that is pretty compact.
The 50mm f1.8 can typically be found for less than $40 so it's well within your price range. I believe it's got 49mm filter threads.
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