This talk of Flash sync got me interested in using photo flash with digital, so I googled it. This page turned up. Yes I was wrong M and X sync aren't necessarily the same. But all this seems to be dependent on the manufacture. I'm sure there were standards but they were probably honored in the breach.
Well the page. It's about using digital cameras and flash bulbs. Some sample photos, some technical information, some testing, not a lot of math for those who don't want to do any heavy lifting. Warning. The page contains a tasteful nude photo. http://bstorage.com/speleo/bulbs/ I thought it was an interesting read. (Now where can I find a cave, some old FP flash bulbs, a good flashgun, and oh yea, the most important part, a nude woman...) graywolf wrote: >X is not the same as M. Although both can be used at low shutter speeds. >X fires the flash when the shutter is fully open, the others fire the >flash before the shutter is fully open. > >The idea with M sync is that the flashbulb fires, the shutter opens, the >shutter closes, the flashbulb burns out. Because the bulb burns longer >than the shutter is open is why exposure varies somewhat with shutter >speed when using flashbulbs. With X sync the shutter opens, the very >bright short duration flash fires, the shutter closes. > >Duration of the flash varies from long to short in this order FP, M, F, > X, and the bulb has to fire closer to fully open as the duration gets >shorter. FP bulbs firing before the shutter starts to open, and X firing >only when it is already fully open, with the others being in between. > >Nothing like playing with an old press camera and flashbulbs to learn >this stuff. OTOH, if you do not use flashbulbs all you have to do is set >the camera to X. Most current cameras have no other option. > > > -- When you're worried or in doubt, Run in circles, (scream and shout). -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
