User Guide

Canon EF 75-300mm f/4-5.6 III USM Lens Review

The Canon EF 75-300mm f/4-5.6 III USM Lens is a relatively small, very light and very

cheap lens for this focal length range.

The Canon EF 75-300mm f/4-5.6 III USM Lens is really cheap. Usually you get what you pay

for - unfortunately this is the case with the Canon EF 75-300mm f/4-5.6 III USM Lens.

Build quality of the Canon EF 75-300mm f/4-5.6 III USM Lens is mediocre (and this may be

a generous rating). Lightness is the benefit, but you won't find smooth zoom and focus rings.

I wouldn't want to subject the Canon EF 75-300mm f/4-5.6 III USM Lens to any abuse as I

doubt it would survive.

Image quality from the Canon EF 75-300mm f/4-5.6 III USM Lens is also mediocre.

The Canon EF 75-300mm f/4-5.6 III USM Lens is soft wide open at all focal lengths.

Sharpness decreases as it zooms from 70mm to 300mm. However, the corners are softest at

70 and getting better by 300.

Corner and center softness decrease as the Canon EF 75-300mm f/4-5.6 III USM Lens is

stopped down.

Stopping down a relatively slow lens means a lot of light (or a flash) is necessary for handheld

photos. Handholding a slow lens at 300mm requires a lot of light to begin with.

7-blade aperture is a decent feature for a lens in this price range.

The Canon EF 75-300mm f/4-5.6 III USM Lens is most comparable to the

Canon EF 75-300mm

f/4-5.6 IS USM Lens

. Image quality is very similar between the two. Of course, IS can offset

part of the handholding dilemma.

The Canon EF 75-300mm f/4-5.6 III USM Lens suffers from CA (Chromatic Aberration).

Pincushioning is visible at 300mm. Vignetting is well controlled. Focus speed is OK, but not

fast.

From left to right in the comparison picture above are the Canon EF 24-70 f/2.8 L USM Lens,

Review

Vignetting

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Review Vignetting Canon EF 75-300mm f/4-5.6 III USM Lens Review The Canon EF 75-300mm f/4-5.6 III USM Lens is a relatively small, very light and very cheap lens for this focal length range. The Canon EF 75-300mm f/4-5.6 III USM Lens is really cheap. Usually you get what you pay for - unfortunately this is the case with the Canon EF 75-300mm f/4-5.6 III USM Lens. Build quality of the Canon EF 75-300mm f/4-5.6 III USM Lens is mediocre (and this may be a generous rating).
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Canon EF 75-300 f/4-5.6 III USM Lens, Canon EF 75-300 f/4-5.6 IS USM Lens and Canon EF 70-200 f/2.8 L IS USM Lens. The Canon EF 75-300mm f/4-5.6 III USM Lens is quite small and very light. It extends significantly when zooming to 300mm, but is very easy to carry around. The 75-300mm focal length is very useful. A wide variety of uses can be found for this range including portraits/people, pets, nature ... As for the price, the Canon EF 75-300mm f/4-5.6 III USM Lens is cheap.