Q1: What is the field of view on the Zhumell 10x42 binoculars?

A: Zhumell Signature 10x42 binoculars have an FOV of 342 feet at 1,000 yards.

Q2: What is the twilight factor?

A: Twilight factor of the Zhumell 10x42 Signature binoculars is 20.49. Be careful about giving too much weight to the twilight factor, however. Twilight factor is simply the square root of the binocular's aperture times its magnification. It can tell you something about low-light performance, but it certainly doesn't tell all. Even more important is the number and quality of optical coatings. These determine how much of the light that strikes the objective lens actually makes it through to the eye.

Q3: I wear tri-focal glasses. Are these binoculars usable with glasses?

A: Zhumell 10x42 Signature binoculars have eye relief of 14.5mm. That is perhaps a bit too little for folks who wear glasses. Whether an individual would be able to use them with eyeglasses would depend on the person's own lens-to-pupil distance.