Canon 10x30 IS II Handmatig - Pagina 14

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3) Does it seem as though the colors are running

together? How about discoloration?

When you look at a white object, a rainbow-type ring

appears. Called chromatic aberration, the image quality usually

decreases, and occurs with binoculars with larger apertures and

higher magnification (photo b). Also, because of the coating and

different lenses used for the binoculars, the colors may change.

Point the binoculars at a white image and check to see how

white the image is (photo c).

In order to prevent discoloration, Canon has adopted the

UD lens (15X50 IS ALL WEATHER, 18X50 IS ALL WEATHER)

from the EF lens series, which is known for its superior optical

technogy. In addition, with the "super spectra" coating, we

guarantee bright and clear images (photo d).

4) Is the entire image clear?

There are more binoculars with a wide field of view to meet

the demands of consumers. However, there are cases where the

binoculars were "forced" to have a wider field of view, which

causes the image quality around the edge of the lens to decrease.

When this happens, most of the time it is caused by curvature

of the field. Point the binoculars at a wall, focus on something

simple, and check if you can see clearly all round (photo e).

If the curvature of the field is large, the edges will be blurred.

It is not recommended to purchase such binoculars.

To greatly decrease the curvature of the field, Canon uses

a field-flattener lens and an aspherical lens. With Canon

binoculars, you will have beautiful image quality all round.

When looking through the binoculars, there are times when the

perpendicular lines of windows of a building or bricks seem

warped around the edge of the lens (photo f). This is called

distortion. When the distortion is great, not only will the entire

object seem distorted, but when you move the binoculars, it will

seem as if the object were flowing, making it very hard to see.

Canon uses high-precision aspherical lenses to correct the

distortion.