21mm Super Angulon

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Regarding the use of a 21SA on an M240, I'm assuming it would have the same color edge\italian flag\metering quirks as is present on the M9. Right?

No metering quirks on the M240 -- the metering system is a different design and is unaffected by the protruding lens. It meters just fine.

Italian flag, yes, though I'm not sure it's as pronounced as on the M9 as the M240 has a different sensor design that is, in part, an attempt to address these issues (shallower wells). Haven't compared the two though -- all I can say reliably is that on the M240, photos taken with the SA 21/3.4 do display colored edges. Cornerfix and Adobe Flat Field both seem to resolve that problem.
 
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