Thanks for voicing the unmentionable, Steve. There is at least one excuse for removing the flange though.
Twenty years ago when eBay was flooded with cheap, off-brand M42 lenses removing the flange provided a very inexpensive adapter that could be 'glued' to those lenses for convenience. A little judicious fiddling with spacing even allowed focusing to
'infinity and beyond' -- should one choose to go way out there.
With considerable wasted effort one could even lathe-turn the adapter to exact M42 specs -- just to prove it could be done you understand. (Oh, the hours . . .
)
Besides, what percentage of images are
actually shot with
infinity as the intended point of focus? For some strange reason I've never been able to confirm my infinity focused shots were actually in focus. Every time I got close . . .
The flip side is that the flange offered an extra bit of close focus and with TTL focusing and a little attention to DoF tables $10 worth of lens plus adapter covered 99% of
my interest in those lenses. Somewhere 'round here I've still got a couple of nice old third party lenses with those 'circumcised' flanges super-glued to 'em. With ring or bellows . . .
The truth is, we owe Pentax thanks for maintaining the limitations of the original lens mount diameter which allows use of the legacy M42 and PK mount lenses while every other manufacturer either abandoned their earlier mounts to transition to AF and AE lenses
or went out of business. (Really; think about the timing.)
Pentax still bears that burden today. What they got for it though was body-based anti-shake mode for
ALL lenses. And Sigma and Tamron had to respect the new, limited Pentax-market for universal lenses with big-market sales.
This would be a good time for a resurrection of interest in older lenses for the newer digital-only folks.
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