Quote Originally Posted by David H. Bebbington
I have 50, 90 and 180 lenses.
interesting, I have each of these also - however the 50 and 180 are RZ lenses, the 90 is an RB -

I find myself using the 50 the most and 180 next, have used a 127mm also, but its since got jock itch, I would rather the 90 had - ah well - I say go with the 180, as I have had good results with it, and its good to get a fair amount of variance in focal lengths if you only have the 2 or 3 lenses -

hope I didnt confuse things!