Ernst Dinkla
Well-known
With 4 elements I would expect a Tessar design for a Kodak Anastigmat. That is 4 elements 3 groups, the cemented group at the back. Is that what you see? Two cemented groups is quite unusual for that kind of cameras.
http://en.wikipedia.org/wiki/Tessar
I have removed a Kodak Anastigmat Special 101mm 4.5 (Tessar type) from a Monitor 620 and put it on a Agfa Record (120) model. Still have to make trial images but I think it is much nicer that way than 620 conversions in whatever way. The lens performed well on the Monitor that I converted to 120 spools but even then the space to insert rolls was very tight. There were more issues with that camera.
Ernst Dinkla
colyn
ישו משיח
The front group has 2 separate elements as well as the rear. None are cemented..
Ernst Dinkla
Well-known
So in optical terms; 4 elements, 4 groups. Which usually points to a Dialyte type for Anastigmats. Or an Aviar type which looks similar but is more a triplet with the center element split in two. The separation between them should be less than in a Dialyte
http://forum.mflenses.com/viewtopic.php?t=6068&view=previous
To go from a Triplet to a 4 element, 4 groups design:
Front element replaced by a pair of lenses: Kern Kino-Objektiv.
Rear element replaced by a pair of lenses: Taylor-Hobson Speedic and Coric.
Middle element replaced by a pair of lenses: Taylor-Hobson Aviar. This makes the lens symmetrical and closer to the Double-Gauss type. In the Aviar the two negatives are placed very close to each side of the diaphragm, then the Dogmar type makes them pulled further apart.
Taylor Hobson origins are likely but the patents may have been expired by the time this camera was made.
Ernst Dinkla