Optolyth Royal 9×63

Specifications:

Objective diameter:  63 mm
Magnification:  9 x
Exit pupil: 7 mm
Eye relief (effective, measured from folded down eyecup): 14.5 mm
IPD:  63 – 74 mm
RFOV:  5.7  degrees = 100 m
AFOV (measured, rounded):  52 degrees
Minimum focus distance (measured): 5.1 m
Focus type:  CF (direction of rotation from close to infinity: < anticlockwise)
Degrees of rotation of focus wheel from 5.1 m to infinity (measured): 525 degrees
Range of diopter adjustment (estimate): +/- 5 dpt*
Excess travel of focus wheel beyond infinity position (estimate): 8 dpt*
Prism system:  Abbe-König
Waterproof: splashproof
Weight (measured, with eyepiece cover and strap): 1‘233 g
Made in: Germany
*range of diopter adjustment not affected by position of focus wheel

Remarks:

Have you ever wondered why there are almost no roof prism binoculars with 60mm or more diameter of the objective lenses? This one has 63mm, and it’s not a problem for some, but if you happen the be a person with a relatively narrow interpupillary distance between your right and left eye, you will immediately recognize the issue. Minimum IPD of this bino is about 63mm (most other binoculars have 56-58mm minimum). You just can’t bring the two tubes closer together. That’s why binoculars with wide objective diameters tend to be Porro or some other prism design with a lateral offset.
The optics of the Royal 9×63 are okay, but not overly impressive; many actually prefer the 8×56 model with its more balanced performance.

see also remarks in separate post “Optolyth Royal 8×56”, https://binocular.ch/optolyth-royal-8×56/

Ratings: