On Mon, 03 Nov 2003 18:43
Willem-Jan Markerink wrote:

> On 3 Nov 2003 at 18:57, Paul Repacholi wrote:
> 
> > 
> > There is little difference, with digital you still use ALL of
> > the front element so a narrower hood will vignet the image. It
> > will not be as bad as it would on 35mm full frame though.
> > 
> > Better to use a deeper hood for the view angle.
> 
> Deeper or more narrow (at the same length) is equal in this context; 
> it's the angle of view that is important, and with a less than full-
> frame size chip you simply use a smaller angle of view....you don't 
> use the full front element anymore....

<snip>

Absolutely!  For example for the 16-35L, 17-35L & 17-40L lenses you can uses the hood 
for the EF 24 f1.4L (the EW-83DII).  It's both narrower *and* deeper than the standard 
hoods and causes no vignetting on a 10D.  I'm pretty sure it works on the 20-35 
f3.5-4.5 USM (non L) as well. 

For some of the primes you simply move up to the next hood in the range.  The 28 f2.8 
and 35 f2 use the EW-65 (various versions) for full frame, but work with the ES-65 
hood designed for the Mk 1 50mm.  The 50 Mk1 uses the ET-65 hoods designed for the 
85f1.8/100f2 pair.

Cheers
Gary



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