On Thu, May 21, 2009 at 07:10:28PM -0600, William Robb wrote: > >> The difference between 1/180th and 1/250th flash synch is substantial > >> when shooting a brightly backlit subject in bright daylight. > > A lot can happen in 0.0016 seconds. > C'est what?
For example, someone walking by at a brisk pace of 4mph will move an additional tenth of an inch. With a 1/250th sync, you could have caught them moving only 0.3 inches, but noooo, with Pentax's horrible 1/180th, we're stuck with a whole 0.4 inches of movement. Of course, with hummingbirds, it's even worse. Why, at 1/180th, the hummingbird's wings have gone through a whole 38% of a stroke. With 1/250th, that'd be reduced to a mere 28%. Okay, seriously -- the time difference just doesn't seem that much. (1/643 of a second *different*.) Neither does half a stop. I accept that there's some narrow cases where it'd help, but I can't see it as the huge deal that it seems to be to some folks. What am I missing? -- Matthew Miller [email protected] <http://mattdm.org/> The Definitive Pentax P-TTL Flash Model Guide: <http://pttl.mattdm.org/> -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
