On a smaller scale, the Pen F, FT, FV shutter looks like a movie camera
shutter. A circular disc with a notch cut in it. The notch is just big
enough to fully uncover the film area each time it spins.
John
http://www.zuiko.com
Greg Palman wrote:
> Lars and Peter,
>
> Regarding the oly pen f and ft, the appartent differences are the ft
> has a light meter and a self timer feature. The F had a nice etched
> (?) gothic F on the front of the body to the right( as you look at
> the camera from the front) of the Olympus - Pen signature. The gothic
> F was displaced by the self timer lever on the FT.
>
> Regarding the rotary shutter, it is easier to picture than describe,
> but following is the text from a Pen F owners manual I have...."
> Rotary Metal Focal Plane Shutter...The newly designed shutter on the
> Pen F is completely different from other types of focal plane
> shutters. It contains a semi circular titanium screen (50mm in dia)
> which rotates in a clockwise direction at a distance of 1.6mm from
> the film. This shutter works so rapidly that regardless of the
> shutter speed it never fails to open completely, making it possible
> for an electronic flash to be synchronized with it at speeds of from
> 1 to 1/500 of a second. (With other focal plane shutters this is
> impossible when speeds exceed 1/60th of a second.)"
>
> The typical prism of a 35mm is eliminated by having the mirror
> pivot on its side(left side as you look at the camera body from the
> front) with the long axis of the mirror parallel to the vertical
> plane of the camera instead of with the horizontal plane as is the
> case with any full size 35mm I am familiar with. The mirror swing is
> then to the left, allowing light to pass by and onto the film plane.
> The focus screen is mounted on its side and light passes through the
> screen, a prism, bounces off a mirror, through a magnifier, another
> prism and out to the eye. Got it<g>? If you want a copy of the manual
> or pages describing the above let me know.
>
> What this means is, when you hold the camera naturally the viewfinder
> image is with its vertical axis up(as if you are holding a full 35mm
> camera in its side). To get a frame with the long axis horizontal you
> have to hold the pen f on its side. --Greg
>
>
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