I believe the flash is normally fired in the beginning of the period of fully opened shutter (first or leading curtain sync) - unless of course the camera/flash is set to last or trailing curtain sync, which mean that the falsh will then fire just before closing time.
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 Peter Loveday Sendt: 19. februar 2007 04:23 Til: Pentax-Discuss Mail List Emne: 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.1/691 - Release Date: 02/17/2007 17:06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.18.2/692 - Release Date: 02/18/2007 16:35 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
