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View Full Version : Dallmeyer 1A question.......Jim Galli ?



JosephBurke
18-Jan-2010, 15:30
...My Dallmeyer 1 A (Serial # 20532) has a focal length of about 6 1/2 at infinity.(it is focused at infinity in the image)....but the attached info suggests otherwise...the cells are all there and correct I'm sure.......the other info regarding flange size is close enough....Jim Galli / Eddie / Goamules chime in......

Jason Greenberg Motamedi
18-Jan-2010, 20:01
Are you measuring from the waterhouse slot?

Steven Tribe
19-Jan-2010, 03:37
Or is one of the rear lenses the wrong way round?

JosephBurke
19-Jan-2010, 07:10
measurement is from the rear cell....

goamules
19-Jan-2010, 07:25
Their numbering system changes slightly over the years. Look for an earlier ad and you may discover they were shorter focal length. I've seen it happen with the "D" models anyway.

Garrett

Jason Greenberg Motamedi
19-Jan-2010, 07:34
measurement is from the rear cell....

The Waterhouse slot approximates the nodal point where measurements should be taken. Try again and see if it isn't closer to 10".