I would think that it is the angle of view that counts, not the focal length. So, a flash read out of 50mm (lens for 35mm) should cover a digtal lens with focal length 33mm, which is equivalent to 50 mm. So a FLASH calculatad for 35mm film should be fine with a LENS for 35mm, even when used on the *ist d...?
Jens Bladt mailto:[EMAIL PROTECTED] http://hjem.get2net.dk/bladt -----Oprindelig meddelelse----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sendt: 21. april 2004 09:55 Til: [EMAIL PROTECTED] Emne: Re: More on shoe-mounted flashes With the nikon dslr and sb80dx flash,the head read out for focal length used is whats on the lens,not in regard to the 1:5 factor.(ie: If i'm at 50 on my 35-70 f2.8 the read out says 50 on the flash,not 75.) I would quess the Pentax would be the same. I think thats what your after, yes.:-) Dave > More expensive models advertise that the head zooms automatically to > match the focal length of a zoom lens. One of the new Sigma digital > flashes advertises that it does 28-105 mm. That is presumably in 35 mm. > format. > > So what happens if you use it with the DA 16-45 on the *ist D? At > wide-angle, the equivalent angle-of-view would be 20-21 mm. If you set > the DA 16-45 at 21 mm, will one of these flashes zoom its head to 28 mm? > Or will it just not work and report an error? > > Anyone tried this? > > Thanks, > > Joe >
