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but were afraid to ask: 
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Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
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Wide-open it's a ∱2.5. It still impresses me how sharp it is, particularly for being a 45+ year old design.
That was on the D7200, it has AiS capable metering. On the later D7500 that was done away with... wish they hadn't done that.
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Reminds me of my EF135 f/2. Not quite as old as your 90mm, but still close to 30 years old. That is my go-to lens when shooting indoors, such as recent grand niece's HS graduation, or indoor rodeos. Canon has a new RF 135 f/1.8 which, if you pixel peep, is a little sharper in the corners, and 1/3 stop brighter, but considering what I paid for this 135 and the fact that I'm more than happy with results, I can't see myself spending north of $2100 to "upgrade." Is the RF version "better," sure in some subtile ways, but my trusty old EF version is great, so I'm in no big hurry to upgrade. Yes, I have to use an adaptor to mount it, but big deal. Lot's of other gear I'd spend that much one before an upgrade I really don't need. A truly good tripod for example.
