Hi Zwicko,

It's a lovely modern Tessar design which was made in small batches. The extra stop makes for its particular interest optically.

I use the 300mm f4.5 single coated Docter Wetzlar designed lens for wholeplate format (covers well with a few mm of movement at infinity)- the 210mm being more appropriate for 5x4" format. There isn't much to separate one Tessar from another optically, but the f4.5 kind of does it. Enjoy working with it!