фото на canon 17-40 l usm

and split/graduated neutral density filter users will care about this.

Since the filter attaches to the fixed lens barrel - the filter also does not rotate.

If you have a filter installed, you will have no external movement.

The movement is 100% behind the filter threads.

This lens does not extend with a very small exception - the objective end lens elements move in/out slightly inside the lens barrel during focusing.

The focus and zoom rings are nicely sized, turn smoothly and are nicely damped.

Utilizing Ring USM, the Canon EF 17-40mm f/4 L USM Lens focuses very fast, quietly and accurately.

Obviously, 17mm is vastly wider than 40mm.

I know, the 30mm focal length is a somewhat unusual choice for this comparison, but ... I didn't plan to use this set of images this way - I was just shooting the scene.

Let's take a look at a focal length comparison.

As indicated by the "ultra wide angle" designation, the 17-40mm focal length is ultra wide on a full-frame DSLR.

It is the lightest L lens currently made (1.1 lbs / 475g) and is the smallest L zoom lens currently produced (3.3" x 3.8" / 83.5mm x 96.8mm - DxL).

The 17-40 f/4 L fills out the bottom focal length range of .

Because it is a very high quality but moderately-priced ultra wide angle zoom lens, the Canon EF 17-40mm f/4 L USM Lens is one of Canon's best selling lenses.

Manufacturer ID: 8806A002Review Last Updated: 2009/05/08

        

Canon EF 17-40mm f/4 L USM Lens Review

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Canon EF 17-40mm f/4 L USM Lens Review