from a practical standpoint there is very very little difference between 1/150 and 1/125 in terms of exposure. Its only about 1/4 of one stop difference. Nothing to freak out about, just use the 1/125 setting and forget about it. jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Loveday Sent: Sunday, February 18, 2007 10:23 PM To: Pentax-Discuss Mail List Subject: Re: *istD X Sync > The ambient light should be contributing almost > nothing to the exposure under these circumstances. The duration of the > flash exposure is 1/1000-1/20,000 sec, depending upon the exposure. X > synch fires the flash at the midpoint of the shutter's exposure. So, > the shutter speed should make no difference at all. > > Or is there something I am missing too? Oh, I'm not complaining about the results I get at 1/125, it does work as expected. Its just that every one of my other Pentax bodies (8 in all) allow me to set them to X sync; either by an explicit X position, or by virtue of the fact it is a 'standard' shutter speed, like 1/125 etc. I was just suprised that there is no way to set it to 1/150 at all. It does select that with an external dedicated flash, just can't do it with a PC connection. - Peter -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
