Carl Zeiss Jena Deltrentis 8×30

Specifications:

Objective diameter:  30 mm
Magnification:  8 x
Exit pupil: 3.75 mm
Usable eye relief (measured from rim of eyecup): 5.5 mm
IPD: 49  – 73 mm
RFOV:  8.6  degrees = 150 m
AFOV (measured, rounded): 65.5 degrees
Minimum focus distance (measured): 3.6 m
Focus type: IF (direction of rotation from close to infinity: > clockwise)
Range of diopter adjustment (estimate): +/- 7 dpt
Excess travel of focus wheel beyond infinity position (estimate): 7 dpt
Prism system:  Porro I
Waterproof: yes
Weight (measured, with eyepiece cover and strap): 524 g
Made in: DDR (East Germany)

Remarks:

This military version of the Carl Zeiss Jena Deltrentis, with individual focus and reticle, belonged apparently to the East German Ministry of the Interior, as the mark “MdI” indicates. It was produced in 1973, but apparently never used and put in storage forever and is therefore, despite its 50 years, in mint condition. It’s image characteristics are very similar to those of it’s central focus “cousin”, the Jenoptem 8×30 (see separate post, https://binocular.ch/carl-zeiss-jena-jenoptem-8×30/).