Sorry if this has been discussed before but after selling my 240mm Rodenstock Rodagon some time back (stupid thing I did) I am now in search for an enlarging lens that will sufficiently cover 810. I have been looking at Rodagon replacements and apparently the prices have increased rather substantially since I sold mine. In my search one lens seems to pop up and that is the Gerogon which, as I understand, is/was a lens used in process cameras. In particular how would a 270mm f9 Gerogon perform as an 810 enlarging lens compared to other offerings from Rodenstock such as the 240 Rodagon I sold or even the 300mm Rodagon?
The other problem is that I want to use the lens on my Beseler 45 VXL with the 810 cold light head and so the mounting flange will probably be an issue with Beseler's 4" lens boards. The 240 I sold had the flange filed flat and flush with the lens board on two sides to properly fit into the lens stage.
I have an 8ft ceiling and I want to be able to do 16x20 or larger and I will probably have to design and build an enlarging table with a drop down baseboard to give me better print size options. The 240 Rodagon still seems to be my best bet but would be interested in your thoughts/experiences in this area. Is the Gerogon series lenses worthy as an enlarging lens, in particular, the 270mm? What is the size of the mounting flange and would this be too big to be accommodated by the standard 4" Beseler lens board?