EF Lens Overview

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1 point

Which of the following are used in Canon lenses?

Aspherical Elements

Fluorite Elements

Ultra Low Dispersion Elements

Subwavelength Coating (SWC)

All of the Above

1 point

Fluorite: (Check all that apply)

Is a synthetic crystal that is the best optic for correcting chromatic aberration.

That stuff in toothpaste that fights cavities.

Requires incredible precision to be ground into shape.

Has the correction power of 2 UD elements.

1 point

Ring USM and Micro USM are the two types of motors used in Canon ultrasonic lenses.

True

False

1 point

Canon Image Stabilization does not allow the photographer to handhold lenses at slower shutter speeds.

True

False

1 point

Diffractive Optics lenses have a series of fine rings which allows them to:

Focus more accurately

Effectively cancel out chromatic aberration when combined with normal lenses

Look pretty

1 point

Canon DO lenses are exceptional for all of the following EXCEPT:

Superior correction of chromatic aberration

28% reduction in length of the lens

Excellent in back-lit situations

1 point

What feature of a tilt-shift lens would you use to correct for perspective?

The focusing ring

Tilt

Reverse Tilt

Shift

1 point

The Tilt feature on a Canon TS-E lens enables the photographer to do what?

Take a great picture no matter how bad a photographer he is

Tilt the lens so it looks like you broke your camera.

Change the plane of focus

1 point

Working distance is the basic fundamental difference between the various Canon Macro lenses.

True

False

10.

1 point

What is a major concern when using the MP-E 65mm Macro Lens?

Light Loss

Getting too close to a stinging insect

Dropping the lens after being stung

Losing the focusing rail you purchased to focus the lens.

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