> Winsor Crosby [mailto:wincros@xxxxxxxxxxxxx] wrote:
> You then need to redesign the end of the lens barrel so that the
> rectangular shade only goes onto it in the correct position matching
> the rectangular film format. Then things can get real fiddly
> attaching and detaching unless the design is brilliant.
This may be standard practice, but behind the front element
of my (Canon) 20-35 zoom is a rectangular mask purportedly
to assist in flare control. It still has a lens hood for the
the front element - one of those sexy tulip-shaped ones <g> -
which attaches via a bayonet fitting, and the lens is internal
focussing, so no rotation.
Don't some of the Leica lenses have rectangular hoods?
Cheers
Marc
Sydney, Oz
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