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02-02-2009, 11:44 AM   #16
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QuoteOriginally posted by indytax Quote
I'm also trying to understand the limitations of P-TTL with older lenses before I dive into a Pentax DSLR system.
The limitation is, the flash fires full power. If your particular unit has a manual override unit, great, you can use that, and of course you can use the guide number formula to set an aperture. And nothing the camera does could prevent auto-flash (ie, sensor on the flash unit) from working.

So basically, using a 70's lens puts you back into the 70's with regard to flash, too :-)

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