SLT & real-time TTLmetering and wireless control - possible?

Cabled, wireless, studio - anything do with using flash
HaH
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Joined: Thu Aug 07, 2008 10:48 pm
Location: Bangkok - Helsinki

SLT & real-time TTLmetering and wireless control - possible?

Unread postby HaH » Sun Aug 21, 2011 7:00 pm

A funny thought popped into my head. As I'm not an engineer, laugh away if this seems a laughable idea.

In the olden days of the yester year, the Minolta wireless flash system was a marvel. It metered the flash exposure real time TTL straight from the film, and was capable to order the wireless flashes to shut down when the exposure was correct. But then came the digital sensor, and everything went wrong. Now we have pre-flashes and pre-metering and many problems, which neither Minolta, KonicaMinolta or Sony have been able to correct. As I understand it, although I'm not an engineer, remember, the old system was capable to meter from the film because the film reflected light in a known measure, whereas the digital sensor does apparently not reflect it so, and that allowed the system to operate and control the flashes in real time, during the exposure.

And now the funny thought: What about the translucent mirror? Could the flash exposure be metered from it in the same manner it was metered from the film? It is after all an uniform stable plastic film, and not some multilayered surface of minuscule trinketry in constant anti-shakey shake.

Would or could that work? :roll: Or do we start laughing? :lol:

David Kilpatrick
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Re: SLT & real-time TTLmetering and wireless control - possi

Unread postby David Kilpatrick » Sun Aug 21, 2011 9:52 pm

Yes, it could be made to work. The AF sensor could double as a flash metering module. Welcome to the forum. Your suggestion is correct, and for all we know, could be in Sony's future plans. But there would not be any need to use the mirror as the meter. The reflected image from the mirror could be metered.

David


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