Specifications:

Objective diameter:  50 mm
Magnification:  3 x
Exit pupil:  —
IPD: 57 – 73 mm
RFOV:  “17  degrees”
Focus type:  IF (direction of rotation from close to infinity: > clockwise)
Range of diopter adjustment (according to spec): +/- 6 dpt*
Prism system:  none (Galilean)
Waterproof: no
Weight (measured, with strap): 297 g
Made in: China

 

Remarks:

For all those who felt “underwhelmed” by the various widefield constellation binoculars with magnifications of 1.8x, 2x, 2.1x or 2.3x, the larger Kasai (for the smaller one, see separate post about the Kasai 2.3×40, https://binocular.ch/kasai-trading-rusinov-2-3×40/) is supposed to provide more of a “binocular feeling” with it 3x magnification. The increase in magnification comes with a trade-off, of course: a smaller field of view. Users will have to decide for themselves whether they prefer the “immersion impression” that you get with a very wide field (see separate post about the Orion 2×54, https://binocular.ch/orion-2×54-ultra-wide-angle/), which comes at the expense of “reach”/gain of star magnitudes, or whether the are happy to trade FOV against the 2,5 gain of magnitudes of the Kasai. In BINOCULARS TODAY’s opinion, the 3x magnification is not sufficient to provide a significantly better “reach” in to the night sky compared to the 2x starfield binoculars (4x or 5x would be required, see remarks under separate post “Visionking 5×25”, https://binocular.ch/visionking-5×25/).

see also separate posts
“Astro Hutech Hinode 1.8×40”, https://binocular.ch/astro-hutech-hinode-1-8×40/
“Omegon 2.1×42, https://binocular.ch/omegon-2-1×42/
“Vixen SG 2.1×42”, https://binocular.ch/vixen-sg-2-1×42/

Ratings:

Review:

An initial impression can be found here:

https://www.cloudynights.com/topic/784824-anyone-tried-kasai-3×50/?p=11542574
and
https://www.cloudynights.com/topic/784824-anyone-tried-kasai-3×50/#entry11614191

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