on 16.12.03 17:51, Joseph Tainter at [EMAIL PROTECTED] wrote: > Can someone who owns the AF360FGZ confirm that P-TTL has given you > better exposures than ordinary TTL? Yes, P-TTL is significant upgrade to plain TTL. It usually tries to expose picture so as the flash would be as weak as possible to obtain proper exposure, resulting in more natural results.
> In what conditions? For instance if you have some object that are nearer than main subjext, that you have focussed your camera on. In P-TTL main subjext is usually well exposed, while neareer, out-of-focus objetcs are overexposed. In plain TTL, reflected light from nearer object would foul flash automatic, properly exposing near object and leaving underexposed main subject(s). Actually this is possible because P-TTL uses distance information coming from F and later series lenses and of course it works only when flash head is directed straight (not tilted). I could write about more real-world examples, but I think there's no comparison - P-TTL is simply better, period! It's just pity there's no stronger than AF360 flash that would work in P-TTL. Maybe because Pentax has filed this year new patent for flash metering system using not only multi-segment metering, but also taking in consideration different reflectivities of various colors? Will there be C-TTL (or something) in next Pentax DSLR? It yet has to be seen, as many of the patents remain just patents... -- Best Regards Sylwek
