Yashica Twin Lens Reflex Guide - Focal Press January 1964
Page 49 / 55
Scans and Document copyright by Mischa Koning - www.3106.net
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SHUTTER SPEEDS TO ARREST MOVEMENT
The shutter speeds as listed above are applicable to motion which cuts right across the direction in which the lens and the
photographer look.
If the motion photographed is at an acute angle with the direction in which the lens points the exposure time can be longer,
say 1/30 sec. instead of 1/60.
If the subject moves directly towards the lens (or for that matter away from it) the exposure time can be three or four times
longer, say 1/8 of a sec. instead of 1/30.
Where the above table shows speeds not marked on the shutter use the next faster speed.
APERTURES WITH CLEAR FLASH BULBS (80-100 ASA FILMS)
In bright rooms (kitchen, bathroom) or with films faster than 100 ASA, use next smaller aperture. In very large rooms, at
night outdoors or with slower 40-64 ASA film use next larger aperture.
