ZEISS Binocular School
Focusing Range
All binoculars have the ability to be focused for infinity. So a primary point of distinction between binocular models is the minimum focus range. Birders tend to favor models with a short focus range of about 15 feet, but 20 to 25 feet is usually acceptable.
The concept of shortest focusing distance is a theoretical one based on the visual acuity of a young person. Older people have slightly more distant near focus. Throughout the population, there is a wide variance of near focus distances from person to person. Also, eyeglass wearers who remove their glasses will notice changes in their normal short focus distance.
Magnification
Objective Lens Diameter
Field-of-View
Twilight Performance
Height
Width
Weight
Exit Pupil
Interpupillary Distance
Focusing Range
Advanced Optics System
Prisms
Stray Light
Coatings
Waterproof