Assuming one is willing to give up the automatic diaphragm on SLR
Pentax lenses, and use them only as a manually operated spot down
lens, how much size and weight might be saved on a given focal length
lens?  Also, how much quieter might camera operation be by eliminating
that lens feature and the mechanical mechanism within the camera that
operates the lens diaphragm?  IOW, all we'd get is the sound of the
shutter and the return mirror.
-- 
Shel Belinkoff
mailto:[EMAIL PROTECTED]
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