[A* 135/1.8 + 2X-S] vs. [A* 200/2.8 ED + 1.4X-S] vs. [A* 300/4]
Contributed by Fred. All images (C) 1999 Fred.
Effective apperture 4
Effective aperture 8
A* 135/1.8
+ 2X-S
(Eff. 270/3.6)
A* 200/2.8
+ 1.4X-S
(Eff. 280/4)
A* 300/4