7/15/2010

Bread and butter ~~"Canon EF 24-85mm f/3.5-4.5 USM Zoom Lens"

Canon EF 24-85mm f/3.5-4.5 USM Zoom Lens

 

 Bread and butter2008-07-26
This is a good-value lens that was designed back in the days of 35mm film cameras, although Canon still sells it as of 2008, and it works fine on Canon's digital models. It is a standard EF lens that will fit all of Canon's digital cameras. It is not one of those EF-S lenses that is restricted to the e.g. 400D / 40D range. I give it four stars because it does what it sets out to do, but it is very dull, and there are faster and more interesting lenses out there.

It is one of the least glamorous lenses that Canon sells, in the sense that it has a moderate zoom range that is neither particularly wide nor particularly zoomy; it is not the cheapest, or the most expensive EF lens; it is not the most or the least fully-featured; it is neither flimsy nor rock-solid. It uses USM focus, which is silent and accurate. It doesn't have image stabilisation. It doesn't have a constant aperture. The zoom range is roughly 40-135mm on a x1.6 cropped sensor body, such as a Canon 400D / 40D. The zooming mechanism on my example doesn't creep. The closest focus distance seems relatively far, something like a foot and a bit. The manual focus ring feels a bit cheap, but then again the autofocus is fast and quiet, so it balances out. It has a 67mm filter thread, which is an odd size.

I have taken a few hundred shots with it, a mixture of landscapes and studio shots. In a darkened studio the autofocus is useless - it just goes back and forth, as if lost - but the manual focus ring works fine. It has full-time manual focus, whereby you don't necessarily have to flick the (stiff) AF-MF switch, you can just grab the ring and twist it. At f3.5 it has a nice tight field of view, and it is decently sharp; it seems to jump up in sharpness between f5.6 and f8, and doesn't get much sharper beyond that. On my 35mm Canon 600, with an uncropped field of view, there is noticeable distortion at both the wide and the tele ends. This is less noticeable on a cropped 350D, although it is still noticeable. Otherwise the image quality has no obvious glaring deficiencies. The background blur is pleasant. I found that I had to underexpose by a stop to get the exposure just right, but that might be me, or the camera.

It's attractive as a useful, well-priced walkabout lens for digital cameras, for people who don't mind the relatively tight field of view (40mm is just slightly wideangle). The only problem I can see is that the zoom bellows seem to suck up dust. My (used) example has quite a few specks, although apparently this has an almost unnoticeable effect on image quality. It's a shame that Canon doesn't include a lens hood.
Reviewed By A3CCYAQRHUTPIQ

This review was cited from Amazon.co.uk.


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