Rob Brigham wrote: > > What I dont understand is how it works with TTL. > > TTL extinguishes the flash when the required amount of light has entered > the lens. Thus the duration of the flash cannot be known in advance.
But it's still *way* shorter then the duration of the shutter being open. > Does second curtain disable TTL, does it 'guess' how long the flash > duration will be or does it allow for the longest flash duration that > could occur. "C", I think. TTL definitely works. > I guess probably the latter, in which case there is still > some time between the flash and the shutter closing. This sounds like > 'mid-to-late' curtain flash rather than true second curtain flash - if I > am being pedantic. You are. ;) Still, the flash duration is so short that you really don't see a 'frontal trail', just a little softness around the main subject. This is ok since you have all that blur behind. It's definitely not "long trail, subject, short trail". At least I've never seen that shooting people. Another thing about second curtain sync is that it usually halves your top sync speed - on the Pz-1p it goes from 1/250 down to 1/125. tv - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
