On Sat, 29 Jan 2000, Joseph quoted Ken:
> ==============================
> With rangefinder cameras such as the Lieca, photon flow is limited to only
> the times of the exposure, wheras an SLR will allow photon flow anytime the
> lenscap is off.
> ==============================
That's an approximation. Photon flow is restricted by the aperture in a
rangefinder, whereas SLRs have the aperture fully open except for the
exposure time.
So ..... rangefinders should experience the same photonic wear effects
in those elements in front of the diaphragm, no?
In any event the solution is obvious: prevention is better than cure so
keep the lens cap on.
--
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