RE: Ilex /shutter/Kodak lens I.D.

Peter,

I am sure Richard Knoppow can enlighten you, but on the age let me already
quote Richard:

"Ektar was used by Kodak as a general trade-name for its best grade
lenses. There were a number of designs sold under the Ektar name.
There were Tessar, Heliar, Biotar, Dialyte, and double Gauss types at
least. The same is true of Kodak Anastigmat. Most KA's made before
1930 were four-element air spaced lenses of the "Dialyte" type. After
1930 many were also Tessars. KA's with numbers give a clue 30-series
lenses are Tessars, 70- series lenses are Dialytes. I think there were
also some triplets.
  There were some early Ektar lenses which were not coated. All the
f/4.5 lenses made before about 1946 were uncoated and there were
probably others.
  In another post you mention an f/7.7, 203mm in a Compur shutter.
Kodak mounted both this lens and some others in Compurs. They were
among the last of the Ektars to be made. I don't have a year but would
guess late fifties or early sixties. Earlier lenses were mounted in
Kodak shutters.
  You can date Kodak lenses built after 1938 by the two letters
preceding the serial number. They stand for the last two digits of the
year. The key word is CAMEROSITY, standing for 1,2,3, etc."

So your lens would be from 1948..

Best,

Cor

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Dear List:

I wonder if one of the more learned and erudite members of this
knowledgeable list could identify an Ilex No. 4 ACME shutter, with a Kodak
Ektar 7.5 inch focal length, with a maximum aperture of f:4.5, and a minimum
aperture of f:32 ? Facetiousness aside, the serial numbers are listed below:

Lens serial number : EI 512
Shutter serial number: S22-55

There is another number on the Ilex, in much tinier lettering, which I
assume is a patent number,.
However: 2,249,548; there are also some faded numbers which might be a
patent number, but I can't read them.

I use the lens in my 10x8 Folmer Graflex Century Universal, serial number
16174; would any one no its approximate age?

There are two other lenses I generally use, both stunning: A Rodenstock
Sironar f:6.8 360mm, and a Schneider Symmar, f5.6 360mm. These have given me
my best results so far with 10x8 Ziatypes.

Thanks,

Peter McDonald
Canberra, Australia.
Received on Tue Nov 25 04:23:31 2003