On my 28/2.8 I've just fitted a rectangular twist-clamp Pentax hood - a
hood made for the old screw-mount Takumar 28/3.5. I'll see how it goes.
Perfect fit if rather large, but much greater shading than the Oly hoods.
Most of the old Taks had this type - the one for my 24/3.5 is a monster.
I'm looking for the one that fits a Mamiya Press 50mm lens if anyone EVER
sees one!
Rectangulars are not uncommon - I even have a squarish collapsible rubber
hood somewhere and an ancient Aires 43mm clamp-on I use on an old Ricoh
rangefinder.
The tulips make sense for zooms because they allow the fitting of the
deepest possible hood at the wide end - shading at the long end is probably
still inadequate but better than it would be otherwise.
Andrew
>I remember such a hood many years ago. It was for another camera
>system. I would assume that it slipped on or it may have been hard to
>line up.
>
>Gregg
>
>Lex wrote:
>>My guess is the tulip shape provides the maximum protection from flare
>>without causing corner vignetting. I suppose the ideal shape would be a
>>rectangle matching the proportions of the 24x36 frame, but I've never seen
>>such a hood.
>
>
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