C.P. Goerz
Berlin
Find great deals on eBay for! Shop with confidence. The serial number is 140390. Does anyone know of a site or other source which provides a cross reference between Goerz/Dagor serial numbers and year of manufacture? Goerz Lens Serial Numbers 2/5/2018 by admin Antique CP GOERZ Optical KENRO K2 LENS for Large format photography F10 This lens is a Goerz Kenro K2 Dagor, focal length is 250mm, the widest aperture is marked F10 but could be opened a little more. But note in the picture below that the serial number is the same engraved on the barrel and on the cells. So f6,8 or 1:6,8 is the lager aperture for this lens. The following figures, even in this Goerz scale, are very close to the regular series of f stops. The next 3 pictures.
Germany
Model VIIb, 75 mm
Lens Type:For 3 - 8x magnification. Rack and pinion adjustment.
Goerz Lens Serial Numbers Doreen
Serial Number: 186905 .This was made in two versions for either hand or bellows cameras. The tube and elements could be purchased separately. Advertisements in the 1905 BJA list the VIIb as taking a primary lens with a different flange diameter to the example shown here. The 3' negative lens is also not listed as for use with the VIIb tube. A 3' negative suited a prime lens of 6', 7' or 8 ¼' focal length covering a 4' x 5' plate at low magnification and 12' x 16' at high magnification.
Carl Zeiss
Jena
Germany
45 mm
Lens Type: Telephoto attachment. Fixed separation.Helical focusing scaled to 6'. For quarter-plate.
Serial Number:
The Zeiss Tele Objective consists of negative attachments, positive lenses and tubes which can be combined in various ways. The positive lens can be either a conventional prime lens such as a Tessar or Protar, or a specialist group called the Tele-Positve. Some tubes had iris diaphragms and shutters fitted. This example is a Tele-Negative attachment in a tube with removable focusing mount. The likely positive lens would have been a Tele-Positive of 135 mm focal length.
Voigtländer & Sohn
Braunschweig
Germany
97 mm
Lens Type: Telephoto attachment. Fixed separation.For 15 cm primary lens. 2.5x Magnification. For 10 x 15 cm.
Serial Number: 103244 .Goerz Lens Serial Numbers Lookup
For 3 - 8x magnification. Rack and pinion adjustment.
Goerz Lens Serial Numbers Doreen
Serial Number: 186905 .This was made in two versions for either hand or bellows cameras. The tube and elements could be purchased separately. Advertisements in the 1905 BJA list the VIIb as taking a primary lens with a different flange diameter to the example shown here. The 3' negative lens is also not listed as for use with the VIIb tube. A 3' negative suited a prime lens of 6', 7' or 8 ¼' focal length covering a 4' x 5' plate at low magnification and 12' x 16' at high magnification.
Carl Zeiss
Jena
Germany
45 mm
Lens Type: Telephoto attachment. Fixed separation.Helical focusing scaled to 6'. For quarter-plate.
Serial Number: 55260 .The Zeiss Tele Objective consists of negative attachments, positive lenses and tubes which can be combined in various ways. The positive lens can be either a conventional prime lens such as a Tessar or Protar, or a specialist group called the Tele-Positve. Some tubes had iris diaphragms and shutters fitted. This example is a Tele-Negative attachment in a tube with removable focusing mount. The likely positive lens would have been a Tele-Positive of 135 mm focal length.
Voigtländer & Sohn
Braunschweig
Germany
97 mm
Lens Type: Telephoto attachment. Fixed separation.For 15 cm primary lens. 2.5x Magnification. For 10 x 15 cm.
Serial Number: 103244 .Goerz Lens Serial Numbers Lookup
With: Box.Goerz Lens Serial Numbers 222
This is a conventional telephoto attachment consisting of a negative lens for mounting behind a normal objective. The attachment is for use with hand cameras such as the Voigtländer Alpin. It fits inside the bellows and screws to the rear of the lens panel. It was made in two sizes for quarter-plate (12 or 13.5 cm objectives) and 5 ½' x 3 ½' (15 cm objectives). Reinstall hp 3d driveguard.
