Carl Zeiss Jena Silvamar 6×30

Specifications:

Objective diameter (acc. to spec.): 30 mm
Magnification (acc. to spec.): 6 x
Exit pupil (acc. to spec.) : 5 mm
Eye relief (measured): 4 mm
IPD (measured): 45 – 74  mm
RFOV (acc. to spec.):  8.5 degrees = 150 m
Minimum focus distance (acc. to spec.): 3 m
Focus type: IF
Prism system:  Porro I
Waterproof: yes
Weight ( acc. to spec.): 560 g
Made in: Germany

Remarks:

This collection doesn’t generally include vintage models, except if they are representative for a period or an optical breakthrough or otherwise important for the development of the binocular market. The Silvamar is such a model; it was the first Zeiss binocular featuring 30 mm objective lenses. Introduced in 1907, its excellent balance of brightness and image stability made it one of the longest-produced models in the company’s history (with production continuing until around 1969). The Silvamar featured individual focus, but had a sister model with central focus mechanism called Silvarem. The lenses in all early models were uncoated (coating started in 1939). Its optical design consisted of an achromatic objective lens (2 lenses in 1 group) and a 3-element eyepiece, which delivered top-tier edge-to-edge sharpness and depth perception for its time. The sample presented here was produced in 1919 or 1920.