Quote Originally Posted by Bandicoot View Post
Just wondering, any particular reason to want that partticular lens rather than one of the (it seems to me) more common 420mm versions? (I have a 420mm Schneider Repro-Claron that I like very much.)

There is no particular reason to use want one particular lens for a format than another. I have both the 420 mm Repro-Claron and the 450 Nikkor-M. I have tried both on my 5x12 and they work fine. The 450 is my choice for most of my shooting with that format though. I did use my 420 during a workshop last summer when I was too close to get the shot I wanted with the 450. So it is nice to have a range of lenses.