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Re: Was: [OM] Digital Camera that takes OM lenses (READ!) Is now:Sync

Subject: Re: Was: [OM] Digital Camera that takes OM lenses (READ!) Is now:Sync speed vs. fastest speed
From: Winsor Crosby <wincros@xxxxxxxxxxxxx>
Date: Thu, 22 Nov 2001 10:27:43 -0800
I think all are traveling slit once over the sync speed.

C.H.Ling

Winsor Crosby wrote:

 >
 Of course, traveling slits distort moving objects. Horizontally
 moving slits will lengthen horizontally moving objects in one
 direction and shorten them in the other.  That is not too disturbing
 compared to the twist given to a vertically moving object.  I am not
 sure about vertical shutters.  Are they not multiple metal blade
 mechanisms, not a traveling slit?
 --
 Winsor Crosby
 > Long Beach, California


If they are then you will get some rather weird looking distortion when taking pictures of horizontally moving things like race cars. For example, taking a picture of a moving bus from the side, as the slit moves down and the bus moves to the right, the bottom of the bus will at one place in the frame, but by the time the slit gets to the bottom the top of the bus will have progressed in its movement. Instead of getting a rectangular bus it will look more like a parallelogram, more or less depending on the speeds.
--
Winsor Crosby
Long Beach, California

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