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through the binocular and second, that
Curvature of the field
there's no secondary "band" of color(s)
High quality binoculars show excellent
at the edges of the object. This is
sharpness not only at the center of
important because at higher
images, but at the edges as well. This is
magnifications, chromatic aberrations
easy to check: stand at a 90˚ angle to a
tend to occur more frequently. Canon
wall with detail and focus. Then check
binoculars correct for this problem by
the sharpness from center to edge. For
using UD lenses from Canon's EF Lens
the best possible flat-field performance,
series (highest magnification models)
most Canon binoculars use Field
or Super Spectra Multi Coating.
Flattener and Aspherical lenses.
Chromatic aberration
Clear image all
cancelled out.
the way to the edge.
Chromatic aberration
The image near the
causes the highlighted
part to look pink.
edge of the circle is blurred.
Anti-Fog Eyepiece AE-B1
Designed specifically for the 18x50 IS AW and
Without
the 15x50 IS AW binocular, these eyepieces
Anti-Fog Piece
prevent condensation and fogging. Useful in
warm, humid and cold weather.
With Anti-Fog Piece
14
Clarity
they appear to the naked eye. It's easy to
test with a building or other flat subject
To check for clarity, point the binocular at
with pronounced horizontal or vertical
a clearly defined edge, like the lettering
lines by observing whether lines near the
on a sign or a constellation in the night
periphery remain sharp or tend to curve.
sky. Images should appear crisp and
Canon's outstanding optics, including
razor-sharp.
Aspherical lens elements, correct for
Parallel Lines
linear distortion.
Excellent binoculars will render parallel
lines in a subject as perfectly straight as
Clear image.
Perfect parallel image.
Because of lens
aberration, the entire
The tower is slanted and
image appears blurry.
has a spool-shaped effect.
Nomenclature
Diopter adjustment rings
Focusing ring
Image Stabilizer button
On/Off Lamp
Eyepiece barrel
Strap eyelets
Objective lens
HOW TO USE BINOCULARS
This is the proper way to adjust a
binocular for outdoor use.
1.
Look through the binocular, and adjust
the spread of the eyepieces
until you see one circular image.
2.
Close your right eye and look through
the left eyepiece. Use the focusing ring
to focus sharply on the subject.
3.
Close your left eye and look through the
right eyepiece. Do not turn the center
Focusing
Magni-
Prism
Systems
fication
Porro II
18x50 IS AW
Center-Focusing
18x
Prism
Porro II
15x50 IS AW
Center-Focusing
15x
Prism
Porro II
10x42L IS WP
Center-Focusing
10x
Prism
Porro II
12x36 IS II
Center-Focusing
12x
Prism
Porro II
10x30 IS
Center-Focusing
10x
Prism
Porro II
8x25 IS
Center-Focusing
8x
Prism
Roof-
Eye cup
7x42 A WP
Center-Focusing
7x
prism
Roof-
8x32 WP
8x
Center-Focusing
prism
Roof-
7x17 FC
Center-Focusing
7x
prism
General Use
Bird Watcing
Spectator Sports
focus ring any further. Turn only the
4.
The binocular should now be adjusted
right-side eyepiece diopter ring as
for your eyesight. When you move the
necessary.
focusing ring for different distances,
the image will remain sharply focused.
Please note that eye spacing and diopter
adjustment is different for each person.
Another person would have to adjust the eye
spacing and diopter again.
For eyeglass wearers
Remembering the readings of the diopters will make it
If you look through the binocular while
easier to readjust the binoculars after someone else
has used them.
wearing eyeglasses, your eyes will be further
Exit
Obj. Lens
Focus
Relative
Eye-
Real
Apparent
Field-of-View
Size (Encased)
Diameter
Range
Pupil
Bright-
Relief
Field-of-
Angle-of-
at 1,000 yds.
[W x D x H] (in.)
(mm)
(mm)
(feet)
ness
(mm)
View(°)
View(°)
(ft.)
19.7 ~
15
(Long-
66.6
7.8
50
2.8
3.7
194
6 x 7-9/16 x 3-3/16
Infinity
Eye Relief)
(Wide)
19.7 ~
15
67.5
(Long-
50
3.3
10.9
4.5
236
6 x 7-9/16 x 3-3/16
Infinity
Eye Relief)
(Wide)
8.2 ~
16
(Long-
65.0
42
4.2
17.64
6.5
340.6
5.4 x 6.9 x 3.4
Infinity
Eye Relief)
(Wide)
19.7 ~
60.0
36
3.0
9.0
14.5
5
262
5 x 6-15/16 x 2-13/16
Infinity
(Wide)
13.8 ~
60.0
30
3.0
9.0
14.5
6
314
5 x 5-15/16 x 2-13/16
Infinity
(Wide)
11.5 ~
25
3.1
9.6
13.5
6.6
52.8
346
4-11/16 x 5-3/8 x 2-3/8
Infinity
13.1 ~
17
(Long-
42
6.0
36.0
7
49.0
367
5 x 6 x 2
Infinity
Eye Relief)
16.4 ~
18
(Long-
60.0
32
16.0
393
4.0
7.5
5-3/8 x 5-11/16 x 2-1/8
Infinity
Eye Relief)
(Wide)
4.6 ~
16
(Long-
17
2.42
5.9
6.5
45.5
340.6
3-5/8 x 2-3/8 x 1
Infinity
Eye Relief)
*Without batteries. **Waterproof to 3.3 ft. underwater. ***Battery life figures are approximate and based on continuous viewing at 77°F/25°C.
Astromy
travel
Theater
Hunting
Camping/Hiking
Marine Activity
away from the eyepieces, causing the image
to gradually shade off at the edges. To
prevent this, use the foldaway rubber
eyepiece rings if available.
For added comfort, eyeglass wearers can adjust the
eyecups on IS series binoculars by folding back the
rubber eyepiece rings or by twisting the eyepiece up or
down in the case of the 10x42L IS WP.
Weight*
Water
Exterior
Power
Battery
Life***
(oz.)
Resistant
Finish
Source
Water Resistant
Rubber
Two
41.7
2.5 hrs.
AA Alkaline Batteries
(Usable in heavy rain)
Coat
Water Resistant
Rubber
Two
41.7
2.5 hrs.
Coat
AA Alkaline Batteries
(Usable in heavy rain)
Waterproof
Rubber
Two
36.8
4 hrs.
for 30 min.**
Coat
AA Alkaline Batteries
Rubber Coat
Two
23.3
–
4 hrs.
(Soft Plastic)
AA Alkaline Batteries
Rubber Coat
Two
22.2
–
4 hrs.
(Soft Plastic)
AA Alkaline Batteries
One
16.9
–
6 hrs.
Matte
CR123 Lithium Battery
Waterproof
Rubber Coat
26.5
–
–
(Soft Plastic)
for 5 min.**
Waterproof
Rubber
21.2
–
–
for 5 min.**
Coat
Aluminum
6.3
–
–
–
Alloy
Suveillance
15
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