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Old Jan 21, 2007, 10:07 AM   #1
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I am looking for a lens hood for my Sigma 24-70mm lens that is on my 20D.

I found both Flower type and the regular full type. What should I buy?

Are there any Pro's or Con's?
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Old Jan 21, 2007, 10:31 AM   #2
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The whole idea of a lens hood it to prevent light rays from just outside the frame of view from getting into the lens and causing flare and reflections that reduce image quality

The flower hood should provide better protection because it's shape provides longer lobes where necessary while being cut out for the corners

The regular hood will have to be short to prevent clipping the corners and will thus provide less protection to the centres of the edges.

In all cases test the hood on your lens at all focal lengths, especially the wide angles, paying particular attention that the corners and edges aren't being shadowed by the hood. You may have to take shots with and without the hood and compare on a monitor.
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Old Jan 21, 2007, 4:55 PM   #3
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my sigma 24-70mm f2.8 came with a petal type hood. So I would assume they would know which type would work best.
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Old Jan 21, 2007, 5:47 PM   #4
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Caboose wrote:
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my sigma 24-70mm f2.8 came with a petal type hood. So I would assume they would know which type would work best.
Good answer. I got mine used so I did not get a hood. Thank You
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