I glued it to the barrel extension ring M42 to mount it on the DSLR camera, adding another large and small ring. It was interesting to get a picture on a digital camera. The lens has an iris diaphragm, 13 aperture blades. The serial number is 291,040 it was released between 19. I pick up Dagor lens f/ 6,8 focus length 150mm. Even now, this design is implemented in the format of camera lenses from Schneider and Rodenstock. Many lens manufacturers copied this design with minor modifications to get around the patent. Goerz Berlin Dopp-Anastigmat Serie III DAGOR 150 mm f/ 6.8 with glued extension ring M42, for mount on a DSLR cameraĭagor design has been implemented in many lenses. The first batches of Dagor were so in demand that the company's production capacity is not enough.Ĭ. These lenses are available with different focal lengths (from 75 to 1200mm) and aperture (f4-f11). For lenses that time, Dagor well-corrected coma, distortion, achromatic and spherical aberration. The first lens-anastigmatic is Protar, designed by Carl Zeiss, but it did not succeed as Dagor. Dagor actually one of the first anastigmatic, commercially available. Photos of that time wanted to have a versatile lens for portraits and landscape photography. Later, lens calculations were purchased by Goerz firm, and Emil Von Hoegh was asked to job a leading specialist. The design was invented in 1893 by the German mathematician Emil Von Hoegh.
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