Leica Trinovid 10×42 BA

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Objective diameter (acc. to spec.):  42 mm
Magnification (acc. to spec.):  10 x
Exit pupil (acc. to spec.): 4 mm
Usable Eye Relief (measured from rim of eyecup): 12 mm
Diameter of eyelens (measured): 18.5 mm
IPD (measured): 56 – 74 mm
RFOV (acc. to spec.):  6.3 degrees =  110 m
AFOV (measured, rounded): 61.5 degrees
Minimum focus distance ( acc. to spec. and measured): 4.6 m
Focus type: CF (direction of rotation from close to infinity: clockwise)
Degrees of rotation of focus wheel from 4.6 m to infinity (measured): 250 degrees
Range of diopter adjustment (estimate): +/-  6 dpt*
Excess travel of focus wheel beyond infinity position (estimate):  5 dpt*
Prism system:  Schmidt-Pechan
Waterproof: yes
Weight (acc. to spec, without accessories): 890 g
Weight (measured, with eyepiece cover and strap): 962 g
Made in: Germany
*range of diopter adjustment not affected by position of focus wheel



Roughly 30 years after having been brought to the market, the Leica Trinovid “BA” models still impress today with their sturdy construction and excellent optics. Some even consider the BA and BN Trinovids the best classic Leica binoculars, being for Leica what the legendary “Victory FL” binoculars were for Zeiss. See also further rermarks under the separate posts “Leica Trinovid 8×42 BA”, https://binocular.ch/leica-trinovid-8×42-ba/ and “Leica Trinovid 12×50 BA”, https://binocular.ch/leica-trinovid-12×50-ba/.


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