A better hood for EF 17-40 on an APS-C camera

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The EF 17-40 f/4 L USM lens is sold with a hood; but with the EOS 20D, it was very large and not very efficient. With it's 1.6 crop factor, the 17 mm focal length becomes the angular equivalent of a 27 mm lens. Therefore, I had asked myself wether a Canon hood existed with a 77 mm diameter for a focal length smaller than 27 mm.

Two of them may match:

EF 24-70 f/2,8 L USM
EF 17-40 f/4 L USM
EF 24 f/1,4 L USM

The EF 24-70 bayonet seems to be off backwards a bit compared to the EF 17-40. The associated hood must be quite large and would be stretched out by the same amount on the EF 17-40, resulting in probable vignetting… On the other hand, the EF 17-40 and EF 24 bayonets seem very similar; and with "great confidence" despite its high price, I had ordered the associated hood: EW-83DII.

If you roll your mouse on the following images, the original hood EW-83E will be replaced by the EW-83DII:

The result: smaller size, better flare protection, and no trace of vignetting. Of course, today I am back with the original hood with the EOS 5D Mark II.

Update: apparently, the EW-83J hood from the more recent EF-S 17-55 lens is also adequate.

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