Originally Posted by DominikDUK
A previous poster mentioned the 4/4 Dialyte type lenses they are actually often superior to tessars they have a wider image circle and are very well corrected. The drawback was less contrast due to more air to glass surfaces but a modern coated dialyte design gives more complicated designs a run for their money. The faster doppel Anastigmats that are found on plate cameras are usually dialytes.
Indeed. I'm using a 6,3/135 Goerz Dogmar
, which is a dialyte, and it's razor sharp
, while the 4,5/135 Tessar is only decent. I have mounted a 4,5/135 Dogmar on another plate camera, that I will try, and have a fast Eurynar 3,5/150 (another dialyte) on another. I suspect that the 6,3 is the best one, but the shallow depth of field with the 3,5 Eurynar fully open could be nice.
Dialytes are interesting lenses and less commonly used than the Tessar types today by classic camera shooters. With the lens hood on and sun in the back, and using black-and-white film, a good dialyte can be excellent.
The slow 6,3 Tessar is said to be the sharpest version, but I haven't tried one yet, and not sure if I will. I have used enough Tessars.