Curvature of the field, Clarity | Canon 10x42L IS WP specs

through the binocular and second, that there’s no secondary “band” of color(s) at the edges of the object. This is important because at higher magnifications, chromatic aberrations tend to occur more frequently. Canon binoculars correct for this problem by using UD lenses from Canon’s EF Lens series (highest magnification models) or Super Spectra Multi Coating.

Curvature of the field

High quality binoculars show excellent sharpness not only at the center of images, but at the edges as well. This is easy to check: stand at a 90˚ angle to a wall with detail and focus. Then check the sharpness from center to edge. For the best possible flat-field performance, most Canon binoculars use Field Flattener and Aspherical lenses.

Clarity

To check for clarity, point the binocular at a clearly defined edge, like the lettering on a sign or a constellation in the night sky. Images should appear crisp and razor-sharp.

Parallel Lines

Excellent binoculars will render parallel lines in a subject as perfectly straight as

they appear to the naked eye. It’s easy to test with a building or other flat subject with pronounced horizontal or vertical lines by observing whether lines near the periphery remain sharp or tend to curve. Canon’s outstanding optics, including Aspherical lens elements, correct for linear distortion.

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.

focus ring any further. Turn only the

right-side eyepiece diopter ring as

necessary.

4. The binocular should now be adjusted for your eyesight. When you move the 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

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

Chromatic aberration cancelled out.

Clear image all

the way to the edge.

Clear image.

Perfect parallel image.

3. Close your left eye and look through the right eyepiece. Do not turn the center

Remembering the readings of the diopters will make it easier to readjust the binoculars after someone else has used them.

If you look through the binocular while wearing eyeglasses, your eyes will be further

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.

Chromatic aberration causes the highlighted part to look pink.

The image near the

edge of the circle is blurred.

Because of lens
aberration, the entire	The tower is slanted and
image appears blurry.	has a spool-shaped effect.

Focusing

Magni-

Obj. Lens

Focus

Exit

Relative

Eye-

Real

Apparent

Field-of-View

Size (Encased)

Weight*

Water

Exterior

Power

Battery

Prism

Diameter

Range

Pupil

Bright-

Relief

Field-of- Angle-of-

at 1,000 yds.

Systems

fication

[W x D x H] (in.)

(oz.)

Resistant

Finish

Source

Life***

(mm)

(feet)

(mm)

ness

(mm)

View(°)

(ft.)

18x50 IS AW

Porro II

Center-Focusing

18x

19.7 ~

2.8

7.8

15 (Long-

3.7

66.6

194

6 x 7-9/16 x 3-3/16

41.7

Water Resistant

Rubber

Two

2.5 hrs.

Prism

Infinity

Eye Relief)

(Wide)

(Usable in heavy rain)

Coat

AA Alkaline Batteries

15x50 IS AW

Porro II

Center-Focusing

15x

19.7 ~

3.3

10.9

15 (Long-

4.5

67.5

236

6 x 7-9/16 x 3-3/16

41.7

Water Resistant

Rubber

Two

2.5 hrs.

Prism

Infinity

Eye Relief)

(Wide)

(Usable in heavy rain)

Coat

AA Alkaline Batteries

10x42L IS WP

Porro II

Center-Focusing

10x

8.2 ~

4.2

17.64

16 (Long-

6.5

65.0

340.6

5.4 x 6.9 x 3.4

36.8

Waterproof

Rubber

Two

4 hrs.

Prism

Infinity

Eye Relief)

(Wide)

for 30 min.**

Coat

AA Alkaline Batteries

12x36 IS II

Porro II

Center-Focusing

12x

19.7 ~

3.0

9.0

14.5

60.0

262

5 x 6-15/16 x 2-13/16

23.3

–

Rubber Coat

Two

4 hrs.

Prism

Infinity

(Wide)

(Soft Plastic)

AA Alkaline Batteries

Anti-Fog Eyepiece AE-B1

Designed specifically for the 18x50 IS AW and
the 15x50 IS AW binocular, these eyepieces	Without
prevent condensation and fogging. Useful in	Anti-Fog Piece
prevent condensation and fogging. Useful in
warm, humid and cold weather.	With Anti-Fog Piece

Nomenclature

Image Stabilizer button

On/Off Lamp

Objective lens

Diopter adjustment rings

Focusing ring

Eye cup

Eyepiece barrel

Strap eyelets

10x30 IS

Porro II

Center-Focusing

10x

13.8 ~

3.0

9.0

14.5

60.0

314

5 x 5-15/16 x 2-13/16

22.2

–

Rubber Coat

Two

4 hrs.

Prism

Infinity

(Wide)

(Soft Plastic)

AA Alkaline Batteries

8x25 IS

Porro II

Center-Focusing

11.5 ~

3.1

9.6

13.5

6.6

52.8

346

4-11/16 x 5-3/8 x 2-3/8

16.9

–

Matte

One

6 hrs.

Prism

Infinity

CR123 Lithium Battery

7x42 A WP

Roof-

Center-Focusing

13.1 ~

6.0

36.0

17 (Long-

49.0

367

5 x 6 x 2

26.5

Waterproof

Rubber Coat

–

prism

Infinity

Eye Relief)

for 5 min.**

(Soft Plastic)

8x32 WP

Roof-

Center-Focusing

16.4 ~

4.0

16.0

18 (Long-

7.5

60.0

393

5-3/8 x 5-11/16 x 2-1/8

21.2

Waterproof

Rubber

–

prism

Infinity

Eye Relief)

(Wide)

for 5 min.**

Coat

7x17 FC

Roof-

Center-Focusing

4.6 ~

2.42

5.9

16 (Long-

6.5

45.5

340.6

3-5/8 x 2-3/8 x 1

6.3

–

Aluminum

–

prism

Infinity

Eye Relief)

Alloy

*Without batteries. **Waterproof to 3.3 ft. underwater. ***Battery life figures are approximate and based on continuous viewing at 77°F/25°C.

General Use

Bird Watcing

Spectator Sports

Astromy

travel

Theater

Hunting

Camping/Hiking

Marine Activity

Suveillance