Docter Aspectem 80/500 UWA 40x

Specifications:

Objective diameter:  80 mm
Magnification:  40 x
Exit pupil: 2 mm
Eye relief (acc. to spec): 18 mm
Usable eye relief (measured from rim of eyecup): 11 mm
IPD:  56 – 74 mm
RFOV (spec.):  2.2  degrees = 38.5 m
AFOV (spec.):  84 degrees
Minimum focus distance (estimate): 15 m
Focus type:  IF
Excess focus travel beyond infinity position (estimate): 5 dpt
Prism system:  Porro I
Waterproof: splashproof
Weight (measured, with eyepiece cover and objective caps): 5‘057 g
Made in: Germany

Remarks:

The Docter Aspectem, sold until 2018 by Docter’s new owner Noblex in three configurations – 30.5×80 with standard eyepiece, 40×80 with ultrawide eyepiece, 20-50×80 with zoom eyepiece – represented the top of the market of large straight-through binoculars. Brillant optics with excellent correction of chromatic aberration provide high contrast and good sharpness. When using the Aspectem, you have to consider that the straight-through design is not always optimal when observing the night sky – 45 degree or 90 degree angled binoculars have an advantage in this respect – and that a magnification of more than, say, 20x for terrestrial observations, where the straight-through configuration is useful, is often not possible due to air turbulence. Still, the Aspectem is a fabulous instrument both for day and nighttime, and it is a pity that it is no longer produced.

see also separate post “Docter Aspectem 80/500 Vario 20-50×80”, https://binocular.ch/docter-aspectem-80-500-vario-20-50×80/

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