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Re: [OM] Questions on OM-2n

Subject: Re: [OM] Questions on OM-2n
From: gerek@xxxxxxxxxxxxxxxxx (Omer Nezih Gerek)
Date: Thu, 15 Jan 1998 18:33:22 +0300 (EET)
Oops! I had sent a reply to another message before getting this
message. This really explains the situation to some extent.

Omer Nezih GEREK

Electrical & Electronics Dept.   email: gerek@xxxxxxxxxxxxxxxxx   
Bilkent University,              phone: 90-312-2664040 x 2480
06533 Bilkent, Ankara,           fax  : 90-312-2664307
TURKEY                           http://www.ee.bilkent.edu.tr/~gerek

> 
> >How does the OTF trigger faster than 1/60? Or does it? Only at 1/60 or
> >slower, the shutter is completely open, and if the sensor detects over 
> >exposure (integral of the ligh, depending on ASA) immediately, it should 
> >start closing the shutter. Is there a faster reaction system in OM's? 
> >Does it, for example, trace the shutter horizontally, as well? The stripe
> >that traces the shutter plane during 1/1000 is quite narrow. Is it
> >possible for the sensor to react so instantly that the second curtain
> >starts following the first opening immediately to produce 1/1000th?
> 
> 
> The shutter curtain has a reflective pattern on it that simulates the
> surface of the film. This allows the OTF metering to create exposures
> faster than 1/60.  Brilliant design, really.
> 
> Ken Norton
> 
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