Aha, great, now I understand the point. This is actually to increase the efficiency of the hood for entire zoom range. Clever idea.
Regards, Alex Z -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Michael J. Shupe Sent: Monday, November 25, 2002 10:54 PM To: [EMAIL PROTECTED] Subject: Re: EOS 28-70L Alex Zabrovsky wrote: > > Heading for the 28-70L I was surprised to discover that the lens extends in > zooming operation. > Is that correct ? (I saw few pictures of the lens in different zooming > positions and in one of them it shows the barrel extended relatively to > another one). > > Prior to that I was sure besides of internal focusing it features internal > zooming as well. > How long the barrel protrudes in longest (or widest) setting ? > > Regards, > Alex Z It does extend when zooming, but not in the direction you would expect (most often zooms get longer as focal length increases). In fact, it gets longer as you zoom to a wider setting, which causes the front element to move to a position that is shallower in the hood, that is, a position within the hood which is just about ideal in terms of hood coverage at every focal length (the hood is mounted to the portion of the lens that does not extend, so the front element moves deeper and shallower in the hood). Most people look on the zooming extension as a drawback, but it has always been my favorite feature of this lens! Mike Michael Shupe M.J.Shupe Photography Michigan Tech University www.northernlightsgallery.com * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
