
Find the binoculars that fit your needs.
Waterproof and all weather
Several models in the Canon binocular line are waterproof or
Lead-free optics
Canon uses environmentally friendly
The importance of objective lens diameter
Binoculars are described by the power
of their magnification (18x, 15x, 12x,
etc.) combined with the diameter of their objective lenses (50mm, 42mm, 36mm, etc.) The greater the magnification power, the larger your viewing subject will appear in the objective lens as you look through the binoculars.
For instance, if you use the 10x42L IS WP to track a subject 100 yards away, it appears to be the same size as a subject located just 10 yards away seen without binoculars. All things being equal, the larger the diameter of the objective lens, the more light it can admit for brighter,
more detailed images. So binoculars like the 10x42L IS WP, 18x50 IS AW and 15x50 IS AW produce particularly bright, clear images.
The key to Field-of-View
The
a 6.5˚
Looking through a 10x42L IS WP binoculars at a subject 1,000 yards away
c. | b. Apparent | a. Real |
1,000 yards: 340.6 feet |
|
Differences in brightness
Canon’s Super Spectra Multi Coating
The brightness of an image is associated with the amount of incidental light that is reflected by the lens. Uncoated lenses can reflect away as much as 8% of incoming light per lens element — resulting in a dim image. For this reason Canon employs Super Spectra Multi Coating to enhance brightness.
results. For daytime viewing, binoculars
with exit pupil sizes between 2.5 and
3mm are often sufficient.
When bright....
Viewer’s pupil diameter is 3.0mm.
When dark....
Pupil dilates as wide as 7.0mm.
Objective element diameter
This refers to the front lens element measured in mm. All things being equal,
viewing is that higher magnification binoculars, even those with smaller exit pupil size or “relative brightness” ratings, can often reveal better detail in low light because of their higher magnification. Twilight Coefficient or Twilight Factor accounts for the magnifying power of a pair of binoculars, and can be a useful
Judging quality
When evaluating binoculars brands and models, here are few things to look for:
Alignment
100 yards away with the naked eye.
10 yards away with
the naked eye.
With a 10x magnification binocular, the hot air balloon 100 yards away will seem as if it were 10 yards away.
Wide field-
Narrow field-
Since many things contribute to the brightness of an image, be sure to consider the following factors as you compare binoculars:
Exit pupil diameter
The size of the image that emerges at the binocular’s eyepiece impacts image brightness. In dimly lit settings, a large exit pupil, for example 4.2mm found on the 10x42L IS WP, delivers brighter
the larger the lens in front of the binocular, the more light it can take in and the brighter the viewing image will be. The 18x50 IS AW and 15x50 IS AW have the largest objective lenses in Canon’s binocular lineup.
Twilight coefficient
One difficulty with using traditional
numerical ratings to determine a
binocular’s suitability for
If the parallel tubes of the binocular are out of alignment due to a manufacturing defect or accident, you’ll see two similar but separate images. There is no way to repair this problem and it renders the binocular virtually useless.
Color
Focus the binocular on a white object. Check two things: first, that the white object appears a faithful white tone
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