P3D Re: "Electronic shutters?" (PHOTO-3D digest 3777)

[bobh@xxxxxxxxxxxxxxxxxx]

Lincoln asks about electronic shutters? He really means electric 
shutter release perhaps. Since the late '70s, the close focal plane 
shutter in SLRs was replaced by a clever blade shutter at the focal 
plane, controlled by magnets. Often called a Copal-Leitz shutter. 
Since release is determined by electro magnets with some true 
magnets..it is electric button. Digital cameras are a whole electronic 
device so of course have electric button. Often frustrating as you 
can't hear a click and may take time for autofocus and image 
storage before you can take next picture. Point and shoots often 
have a programmed shutter in which there is not a true shutter but 
the diaphragm can completely close and acts as a shutter. Only 
opening to the chosen f/stop. FED stereo is a example.
Hope this helps..BobH
Bob Howard (bobh@xxxxxxxxxxxxxxxxxx)
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