M-series diopter trade?

[Joe Wilensky]

I have a Pentax M-series -2 diopter attachment for the viewfinder of 
M- and A- series cameras (it may fit the P series, too). I could use 
another -1 diopter, since that seems to match what I need. Anyone 
have one they'd like to trade for my -2?

I also still have a -3 K and ES series diopter if anyone is 
interested (just postage cost).

Joe
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Joe Wilensky
Staff Writer
Communication and Marketing Services
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Cornell University
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