About Binocular Chart

What the site does

Every binocular in the chart has a record built from its maker's own product page, specification sheet, catalog or manual. The record holds the size, field of view, eye relief, close focus, eye spacing range, weight, prism type and the maker's list price where the maker prints one.

From those records the site builds the binocular comparison chart, a page for every size and brand, lists for common uses and price bands, and six calculators that turn the printed numbers into field width, exit pupil and eyeglass fit.

What the site does not do

Nobody at Binocular Chart has handled, used or measured these binoculars. The pages do not describe image sharpness, color, build feel or anything else that needs a binocular in the hand, because the makers' documents cannot answer those questions.

Three figures are calculated and always marked as such: exit pupil, twilight factor and relative brightness. They follow from the size alone and are the same for every binocular of that size.

How the site earns money

Some pages carry buttons that lead to Amazon. Binocular Chart earns a commission when a purchase follows one of those buttons, at no extra cost to the buyer. A model's place in the chart or on a list never depends on whether it has a button; the affiliate disclosure explains the arrangement.

Prices appear only as bands of the maker's own list price, such as $200 to $500. The site prints no store prices.

Corrections

Makers change specifications and retire models. If a figure here differs from the maker's current document, write to the address on the contact page with the model and the document, and the record will be corrected.