Docter Nobilem 10×50

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Objective diameter:  50 mm
Magnification:  10x
Exit pupil: 5 mm
Usable eye relief (measured from rim of eyecup): 11.5 mm
IPD: 53  – 74 mm
RFOV:  6.7  degrees = 118 m
AVOV (measured, rounded): 65 degrees
Minimum focus distance (measured): 5.3 m
Focus type: CF (direction of rotation from close to infinity: > clockwise)
Degrees of rotation of focus wheel from 5.3 m to infinity (measured): 240 degrees
Range of diopter adjustment (acc. to spec.): +/- 4 dpt*
Excess travel of focus wheel beyond infinity position (estimate): 6 dpt*
Prism system:  Porro I
Waterproof: splashproof
Weight (measured, with eyepiece cover, strap  and objective caps): 1‘313 g
Made in: Germany

*range of diopter adjustment not affected by position of focus wheel



The Nobilem 10×50 impresses with a very decent field of view, good central sharpness and contrast, and a bright image. Designed and originally produced by Carl Zeiss Jena, it was part of the product portfolio that Mr.  Docter took over in the early 1990s from Zeiss (and later sold to Analytik Jena, where they continued to be sold under the Doctor brand until 2016). Production of all Nobilem models has unfortunately been discontinued, but some are still available second-hand.

see also separate posts for “Docter Nobilem 7×50”×50-b-ga/ , and “Docter Nobilem 15×60”×60/


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