Goerz Celor 1A

[monkeymon]

Anyone has information on Goerz Celor Series 1A? The particular lens i have is a 360mm f/3.5.

I have not found any information on a f/3.5 Celor. Every catalog i could find spoke of Celors as 4.5-5.5 lenses.

It's 4 element dialyte, that i know. And the serial number is 2xx xxx, so should be made in somewhere between 1908-1915.

Seem also, that most catalogs are speaking of Series 1B Celors.

I found 2 posts about celors in forums. Other was the basic VM datadumb, that said 3.5 celors might have been made for cinema purposes. Other noted "Porträt-Celor" that could have aperture of f3.5.

http://www.apug.org/forums/viewpost.php?p=210100

[monkeymon]

Also, in the 1913 catalog Celor is shown as symmetrical design.

http://www.cameraeccentric.com/img/i...goerz_2_23.jpg

But this lens looks more like this:



The distance between the cells of the front pair is much larger than in the rear pair.

[Dan Fromm]

Celor is not a prescription, it is a trade name that covers a number of prescriptions. See http://www.dioptrique.info/base/n/n_celor.HTM for prescriptions from Celor patents between 1896 and 1908. The 1908 patent for an f/3.5 lens shows the arrangement you've posted. None is exactly symmetrical, to my eye the f/3.5er is the least symmetrical.

Symmetry is in the mind of the beholder. Not all lenses said to be symmetrical are perfectly symmetric.

[monkeymon]

Celor is not a prescription, it is a trade name that covers a number of prescriptions. See http://www.dioptrique.info/base/n/n_celor.HTM for prescriptions from Celor patents between 1896 and 1908. The 1908 patent for an f/3.5 lens shows the arrangement you've posted. None is exactly symmetrical, to my eye the f/3.5er is the least symmetrical.

Symmetry is in the mind of the beholder. Not all lenses said to be symmetrical are perfectly symmetric.

Thanks for the info. It seems to be patented in 1908. Weird that it's not in 1910 or 1915 catalog. That would leave only 2 years of possible manufacture.