> > From: "Jens Bladt" <[EMAIL PROTECTED]> > Date: 2005/09/14 Wed PM 02:40:11 GMT > To: <[email protected]> > Subject: RE: *ist D or DS & AF500FTZ for Weddings? > > Well, if the ISO setting on the back doesn't have any effect on the > adjustments in the flash unit (if it's just a visual memory indication, as > suggested by you) the flash meter will not know when to cut off the flash > duration, will it? > Regards > Jens > > Jens Bladt > Arkitekt MAA > http://hjem.get2net.dk/bladt
Kostas is absolutely right. It is just a calculator. The flash cuts off light by measuring the amount reflected. There are two values, switchable but fixed. You use the calculator to estimate the aperture to use - smaller apertures for nearer objects, larger for further away. All assuming that you are using the maximum synchronisation speed. Later flashes calculate and tell the camera what aperture to use. At the time of the AF280T, there were no cameras that could automatically select aperture. mike > > > -----Oprindelig meddelelse----- > Fra: Kostas Kavoussanakis [mailto:[EMAIL PROTECTED] > Sendt: 14. september 2005 12:18 > Til: [email protected] > Emne: RE: *ist D or DS & AF500FTZ for Weddings? > > > On Wed, 14 Sep 2005, Jens Bladt wrote: > > > I wonder how the flash actually DOES work, if the light output is > > indifferent to the ASA setting? > > The flash quenches when its sensor is happy. If your lens aperture and > distance were correct (indicated by the slider and thus affected by > the ISO setting), you are OK, if not, you are not OK :-) > > Or so I think. From Boj: > > <http://kmp.bdimitrov.de/technology/hot-shoe/index.html> ----------------------------------------- Email sent from www.ntlworld.com Virus-checked using McAfee(R) Software Visit www.ntlworld.com/security for more information
