[cam2000]

I recently bought a new apo telyt-m 135 F3.4..... just to use when you want more compression or reach out something in the distance. I use the central patch of the M8 for framing, I have made a mental viewing of what the 135 mm can see, so it works out great for me. The lens is light and the colors are superb..... I manage to use it very well without the 1.25 magnifier. What I read is the F4 is very similar where as the F2.8 is much bulkier to work with.