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Canon EF 100-300mm f/4.5-5.6 USM Lens Review

There are lenses which are expensive and are very good in quality and there are lenses which are inexpensive and do not give a good output, The Canon EF 100-300mm f/4.5-5.6 USM lens comes in between them.

The EF 100-300mm f/4.5-5.6 USM lens is highly practical and is a portable telescopic one. The focus adjustment is positioned at the rear side with USM and is quiet fast to zoom using the zoom ring. This saves a lot of time, instead of adjusting the zoom lens for a much more longer time, it particularly proves helpful in dynamic photography, say a video about a bird sitting or flying, which actually happens in a matter of few seconds, but the thing gets very difficult for an amateur photo/videographer if he has to wait for the zoom to occur speculating the time before the bird flies. That is where this lens comes to help. The actual filter size is 58mm. The optical element consists of 13 elements in 10 groups with no special element. The aperture is 8-blade. The diameter is 2.9" and the length of the lens is just 4.8" but provides five zoom groups.

One of the good features in the lens is the rear focusing, it does not change its length or rotates while doing focusing, this will reduce the weird feeling of the lens rotating and falling down from the camera.

The lens provides quiet and fast auto focus; this is one of the best features worth to be spoken of. The color and contrast in the pictures are natural. The lens weighs just 1.2lb and is a good lightweight lens which can be carried around fitted in the camera easily. The lightweight of the lens is also helpful in taking quick pictures as it won't give a feeling of heaviness while lifting the camera.

The maximum object magnification is 1:4 at 300mm. The autofocus is fast enough to do quick zooming while taking pictures, even though the zoom is too smooth and sometimes annoying while taking a natural photo that needs immediate zooming, but there are always few things that are above compromising levels. The quality of picture is really good between 100mm to 200mm and becomes poorer from 200mm to 300mm.

The lens as such needs a lot of light in order to get a good quality picture, one of the few drawbacks is that when the camera is angled down the zoom extends itself, resulting in the lens zoomed in, this makes it difficult to immediately zoom out and take picture when it was kept in an angled down position. The lens does not allow overriding the Auto Focus.

In conclusion the lens is an inexpensive, light weight and value for money for all the Canon camera owners.

� Affordable
� Light weight
� Rear focusing
� Auto focus
� Bad quality of picture from 200mm to 300 mm.
� Zoom automatically extends itself in down angled position
� Needs lot of light
� Not allows over riding in auto focus.

Tue, 07 Jul 2009 23:41:22 +0000

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