Hmm, so... does IS/VR somehow require USM?
Love, Light and Peace, - Peter Loveday
----- Original Message ----- From: "Alan Chan" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, June 15, 2004 5:57 AM
Subject: Re: canon vs pentax
>Exactly - Nikon 80-400 VR has both - aperture simulator and IS :-)
Perhaps that particular design offered enough space for both devices. However, if you look inside some of the Pentax AF lenses, F/FA*300/4.5 for instance, the moving lenses are located at the back of the lens, and the mechanical aperture arm runs right through it. It is practically impossible to fit a USM motor in this lens, unless the mechanical aperture arm was removed. There are many other Pentax lenses with similar designs as well.
Regards, Alan Chan http://www.pbase.com/wlachan
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