I get your point about the trailing curtain, John. But I normally don't want motion blur at all. So, I set the shutter speed in order to freeze (rather slow) motion - anyway as long as I'm not using manual mode, the camera will not allow shutter speeds longer than perhaps 1/20 sec. - depending on the focal length of the lens I am using (in order to make the camera hand holdable). I don't believe these lower speeds get any lower due to SR?
I want to make the most of the available light. Pictures made in total darkness with a flash are not my cup of tea. The flash only freezes motion in total darkness - in principle. So, the 1/10000 sec. issue is of no importance to me. So, I want the shutterpeed as slow as posible, without getting (to much) motion blur. I'd love to have a flsh progrm, that would mesure the available light and then ad one stop for the falsh - this wasy the available light would only "underexpose) the image by one stop. This mode is actually an "inverse fill flash program". regards Jens Bladt http://www.jensbladt.dk +45 56 63 77 11 +45 23 43 85 77 Skype: jensbladt248 -----Oprindelig meddelelse----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] vegne af John Francis Sendt: 10. marts 2007 21:51 Til: Pentax-Discuss Mail List Emne: Re: K10D - Flash Mode On Sat, Mar 10, 2007 at 08:46:00PM +0100, Jens Bladt wrote: > So which camera program do you use for flash photography? > I have normally (PZ-1, MZ-S, '*ist D) used manual mode - setting the speed > to freeze a reasonable amount of movement . . . Well, that's a questionable methodology when relying on flash. The effective shutter speed for anything where the flash is the main source of illumination is the duration of the flash burst (1/10,000 of a second or so), and nothing to do with the time the shutter is open. If there is significant illumination from sources other than the flash then you need to take that into account; that's when the other camera settings (shutter speed, aperture, ISO) are important. But you can't do much with shutter speed; you are constrained to use a shutter speed slower than the flash sync speed so the shutter is fully open at the time the flash fires (unless you are using a camera and flash that are capable of high-speed flash mode, of course, but that introduces a whole new set of issues to consider). I think the single recommendation I would make, if you are expecting there to be any motion blur visible in the shot, is to use trailing-curtain flash synchronisation; failing to do that yields very odd images where the motion blur appears to precede the sharply-exposed subject, rather than trailing behind it (which we have been taught to perceive as normal). -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/716 - Release Date: 03/09/2007 18:53 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.8/716 - Release Date: 03/09/2007 18:53 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
