The three short tele lenses of F2 vintage, from top; the Nikon 135/2. On the left, the compact Nikon 85/2 and right, the Leica Summicron 90/2.
Diagram of decreasing apertures, that is, increasing f-numbers, in one-stop increments; each aperture has half the light gathering area of the previous one.
From the diagram I hope you realise an F2 (f/2) lens is a very bright, "large aperture" lens ;)
I had wanted to test these three primes on my E-P2 for portraits ages ago, but I cannot find a photogenic model who will pose for this cheap skate photographer F.O.C.! Ha ha ha...
