C. P. Goerz Berlin Dopp-Anastigmat Serie III DAGOR 150 mm f/ 6.8 Review
The design was invented in 1893 by the German mathematician Emil Von Hoegh. Later, lens calculations were purchased by Goerz firm, and Emil Von Hoegh was asked to job a leading specialist. Such design is not accidental. Photos of that time wanted to have a versatile lens for portraits and landscape photography. Dagor actually one of the first anastigmatic, commercially available.
The first lens-anastigmatic is Protar, designed by Carl Zeiss, but it did not succeed as Dagor. For lenses that time, Dagor well-corrected coma, distortion, achromatic and spherical aberration. These lenses are available with different focal lengths (from 75 to 1200mm) and aperture (f4-f11). The first batches of Dagor were so in demand that the company's production capacity is not enough.
C. P. Goerz Berlin Dopp-Anastigmat Serie III DAGOR 150 mm f/ 6.8 with glued extension ring M42, for mount on a DSLR camera
Dagor design has been implemented in many lenses. Many lens manufacturers copied this design with minor modifications to get around the patent. Even now, this design is implemented in the format of camera lenses from Schneider and Rodenstock.
I pick up Dagor lens f/ 6,8 focus length 150mm. The serial number is 291,040; it was released between 1908 and 1914. The lens has an iris diaphragm, 13 aperture blades. Closes smoothly. It was interesting to get a picture on a digital camera.
I glued it to the barrel extension ring M42 to mount it on the DSLR camera, adding another large and small ring. And all this construction bolted to the helicoid through the step-down ring M42-M39 and M42-Nikon adaptor. Also, read How to Mount Large Format Lenses on DSLR Camera.
C. P. Goerz Berlin Dopp-Anastigmat Serie III DAGOR 150 mm f/ 6.8 Example Photos
I took all photos on Nikon D3100 at a wide-open aperture (f/ 6,8). RAW export. Contrast correction places quite a bit, and sometimes significantly.
Bokeh an interesting, pleasant at close focusing.
Color reproduction is not bad but is afraid to stray light—especially backlight. The contrast is good for the uncoated lens.
This lens for a film frame 18x24cm. For this area, it has good sharpness. But of course, the ASP/C DSLR sharpness is limited.
Well, a couple of shots of people.
C. P. Goerz Berlin Dopp-Anastigmat Serie III DAGOR 150 mm f/ 6.8 is very interesting with its character. It will be of interest to fans of vintage images. Because of the small aperture is recommended to shot them on a sunny day.