I haven't used the Pentax 360, so I can't say for sure that the Sigma is "better." But it does have a higher guide number, so it will allow you to use a smaller f stop if you need it. That extra power is important when bouncing the flash off a reflector or ceiling. By "almost flawless" I mean that exposures are very close without bracketing. I would say that they're generally within 1.3 f-stop or so of ideal, which is plenty close when shooting RAW. In fact, it's impossible to say if any discrepancy from a perfect exposure is due to camera error or operator error. Paul
> Never having used a flash, forgive my ignorance. What makes the Sigma a > better choice than the Pentax? Almost flawless? Are there things about > flash that are problematical? Why is the istD "pretty much useless at TTL > flash?" > > Shel > > > > [Original Message] > > From: <[EMAIL PROTECTED]> > > > > In practice, the istD is pretty much useless at TTL flash. > > > > > > William Robb > > > > > > > My *istD works great at iso 400 with both the Sigma 500 Super and the > Pentax AT400 flash. Probably a bit better with the Sigma, where it's almost > flawless. > > > > > >
