Archived posting to the Leica Users Group, 2002/03/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Albert Wang wrote: on shutter speeds less Hi everyone, A minor question: which settings for the aperture should I use on a M3 if I want to shoot at shutter speeds less than the 1/50 flash sync speed. For example, using ASA 400 speed film and the subject is 6 feet, the flash guide suggests f16 at the regular flash sync of 1/50. What should I do if I want to use flash at 1/4 sec. speed? Or 1 sec. speed? ====================================================================== Hi, Alfie If you're using flash as the sole (or primary) light source, then the shutter speed that you use doesn't matter, as long as it's not faster than 1/50 sec. The only important thing is that the shutter must be fully open at the moment the flash is lit, which happens at shutter speed 1/50 sec. or below with an M camera. The shutter has no effect on the exposure when you're using flash, except that background illumination, if there is any, will appear brighter in the picture at slower shutter speeds. You control the flash exposure using the lens aperture and, if using an automatic ('computer') flash, in combination with the auto-flash setting. Most auto-flashes offer a choice of 2 or 3 settings, allowing you to select the aperture you prefer, for a given flash-to-subject subject distance and film speed. In your example, you would use f/16 at any of the shutter speeds you mention. Regards, ===== Ray "The trouble with resisting temptation is you never know when you'll get another chance!" __________________________________________________ Do You Yahoo!? Try FREE Yahoo! Mail - the world's greatest free email! http://mail.yahoo.com/ - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html