Didn't see your entry, but guess the Goodness has gotten around--I was looking for eclipse info!
Interesting that in new/digital format, a 50 mm lens is equiv. to an 85 mm in traditional 35 mm camera dimensions:
I recall that bit of lore too, and that such glass cost $$$.. Had to make-do with the classic Nikon 105 mm ƒ2.5

My aging Canon S2 IS shall have to suffice until someone with TMS (too-much-stuff) decides to upgrade his aging-2013 SLR for the next hot-setup with all-#s-Higher. I can wait.

(Wondering.. as the #transistors rises exponentially ... about MTBF and, does anyone Fix these things any more?
I expect that somewhere N. of $1500 they do.)