Attention IPVMU Grads! FOV Calculation Verification Requested

Slogging my way thru the IPVM back-catalog I came across this post about viewing a face at 3000 meters.

I might have clicked out had John's following statement not caught my eye (emphasis added):

Wow, 3000m is really really...

***.

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*******, ****** * **** *** ******** ** *** *************** *** ******** ****, * ***** **** ** *** **** proposed ********* ** ****** *** ***** **** *** ******** **, IPVMU ******* ** ***...

****'* *** **************:(**** ** ****)

Cohu HD 8800

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******!

*.*. *** ***** ****** **** * **** ** **** ******* included ** **** ** *** ***** ** *** ******** ******:

tamron lens calculator

***** */*=.*** *** */* = .* *** */* = .*** and */*.* = .*** ******'* *** ****** ** *** *** focal ****** ** *** */*.* *** ******* *** */* *** 2/3 ****, *** ** ** ******* *** *** */*" ***....

**** ** * *******?

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