What the eff?

[JoeLopez]

Let's add the Fuji X100F.

x100 - first iteration
x100s - Second
x100T- Third
x100F - Fourth

coincidence? 🙂

 

[shimokita]

"F" stands for der Fotograf
"M" stands for Messsucher

and in another life...

U (Uns) for 1 element
B (Bini) for 2 elements
T (Tres) for 3 elements
Q (Quatour) for 4 elements
P (Pente) for 5 elements
H (Hex) for 6 elements
S (Septem) for 7 elements
0 (Octo) for 8 elements
N (Novem) for 9 elements
D (Decem) for 10 elements

 

[ColSebastianMoran]

With the Praktina FX, F meant focal plane (flash sync for focal plane bulb) and X meant electronic flash.

Perhaps "F" is for focal plane shutter.

 

[Crazy Fedya]

Spotmatic F, as well.