Rodenstock ApoGerogon

[Fritz M. Brown]

I posted this over at photo.net and got no response so I thought I would ask her e. I recently pulled an Apo-Gerogon 210mm f/9 off of a process camera and was w ondering about its performance as an enlarging lens. I've come across the infor mation that it has a 78 degree angle of view which gives an image circle of 340m m at infinity focus, which excedes the diagonal of an 8x10 (325mm) so it should cover it, but I was wondering about the performance of this lens at the peripher y of its image circle. How does it perform in terms of light fall off, flatness of field, etc. Is it useful for enlarging 8x10 or should it be restricted to s maller formats. Has anyone out there used this lens for enlarging? Impressions? Thanks in advance.

[Bob Salomon]

Terrible.

It was designed to perform at 1:1 at f22.

If you are printing at f22 at near 1:1 it will work and make a print but that print will not be close to the quality of a 180 or 210 Rodagon lens that is designed for enlarging.

[Ron Dietel]

Bob--I presume a 270 Apo Geragon is equally problematic?

What are some good lenses for an 8x10 enlarger where you have about 7.5-8 ft of ceiling height?

[Bob Salomon]

A 240mm Rodagon. All Apo Georgons are process lenses.