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Re: [OM] Olympus RF Cameras

Subject: Re: [OM] Olympus RF Cameras
From: HI100@xxxxxxx
Date: Wed, 8 Mar 2000 00:11:17 EST
John ( omtech@xxxxxxxxx) writes:

<< And almost ALL leaf shutters are, at best, 1/350th, when set to 1/500th. >>

In testing leaf shutters the test equipment makes a difference as to what 
number you get since the travel time of the blades becomes part of the 
exposure at 1/500 (a sort of variable aperture during exposure). To measure 
the "time" accurately it ideally should intergrate the light and measure 
exposure rather . This also means the exposure may vary somewhat as the 
aperture is topped down depending on how close the shutter and diaphram are 
and the shutter travel time.

Tim Hughes

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