Re: Archimedes moment or Homer moment?

2011-04-30 Thread Boris Liberman
On 4/29/2011 22:57, Ecke PDML wrote: *dons flame-proof suit* I never liked P-TTL to begin with. My Canon AE-1 Program has better flash metering than that. I'll see your TTL enabled Canon AE-1 and raise you to camera body independent Metz SCA flashes. Boris -- PDML Pentax-Discuss Mail List

Re: Archimedes moment or Homer moment?

2011-04-30 Thread Ecke PDML
One Mecablitz 45CT-5 with AE-1and T-90 adaptor and I'll see ]=) 2011/4/30 Boris Liberman bori...@gmail.com: On 4/29/2011 22:57, Ecke PDML wrote: *dons flame-proof suit* I never liked P-TTL to begin with. My Canon AE-1 Program has better flash metering than that. I'll see your TTL enabled

Archimedes moment or Homer moment?

2011-04-29 Thread AlunFoto
In the AF-540FGZ manual it says there is an absolute minimum usable distance in P-TTL (0.7 m). I always thought that was because the flash was unable to quench its output fast enough to operate at shorter distances. I thought so because quenching the blink was how the old TTL system worked. Then,

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Dario Bonazza
AlunFoto wrote: In the AF-540FGZ manual it says there is an absolute minimum usable distance in P-TTL (0.7 m). I always thought that was because the flash was unable to quench its output fast enough to operate at shorter distances. I thought so because quenching the blink was how the old TTL

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Leon Altoff
Hi Jostein, This may have something to do with my P-TTL problems and my macro set up, given that I am running 2 flashes at a distance of 5 to 10 cm. Though I'm metering the preflash with the aperture closed to f16 on a 38 mm or 20mm lens with up to 25cm of extension, so it's unlikely that the

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Boris Liberman
On 4/29/2011 14:57, AlunFoto wrote: Maybe this was obvious to everyone but me. So, eureka or d'oh? Eureka to me. I would (naively) have thought that P-TTL does take into account the ambient light metering for the whole process, thus varying the pre-flash power from shot to shot. But your

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Larry Colen
On Apr 29, 2011, at 4:57 AM, AlunFoto wrote: In the AF-540FGZ manual it says there is an absolute minimum usable distance in P-TTL (0.7 m). I always thought that was because the flash was unable to quench its output fast enough to operate at shorter distances. I thought so because quenching

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Bulent Celasun
I guess the situation may have something to do with the viewing angle of the flash. The minimum distance probably coresponds to the narrowest angle of view the flash can illuminate. Closer than that, the flash still distibutes its light to a wider area (without knowing the real distance). This,

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Ecke PDML
*dons flame-proof suit* I never liked P-TTL to begin with. My Canon AE-1 Program has better flash metering than that. 2011/4/29 Bulent Celasun bulent.cela...@gmail.com: I guess the situation may have something to do with the viewing angle of the flash. The minimum distance probably coresponds

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Tim Bray
Bah... flashes are for wimps. -Tim ducks for cover On Fri, Apr 29, 2011 at 12:57 PM, Ecke PDML overpenta...@googlemail.com wrote: *dons flame-proof suit* I never liked P-TTL to begin with. My Canon AE-1 Program has better flash metering than that. 2011/4/29 Bulent Celasun

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Ecke PDML
what do you do then? burn magnesium in your palm? 2011/4/29 Tim Bray tb...@textuality.com: Bah... flashes are for wimps.  -Tim ducks for cover On Fri, Apr 29, 2011 at 12:57 PM, Ecke PDML overpenta...@googlemail.com wrote: *dons flame-proof suit* I never liked P-TTL to begin with. My

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Tim Bray
The demonic glare coming from my eyes usually suffices. -T On Fri, Apr 29, 2011 at 2:01 PM, Ecke PDML overpenta...@googlemail.com wrote: what do you do then? burn magnesium in your palm? 2011/4/29 Tim Bray tb...@textuality.com: Bah... flashes are for wimps.  -Tim ducks for cover On Fri,

Re: Archimedes moment or Homer moment?

2011-04-29 Thread Ecke PDML
And you set your white balance to frozen hell? 2011/4/29 Tim Bray tb...@textuality.com: The demonic glare coming from my eyes usually suffices. -T On Fri, Apr 29, 2011 at 2:01 PM, Ecke PDML overpenta...@googlemail.com wrote: what do you do then? burn magnesium in your palm? 2011/4/29 Tim