David Savage wrote:

>On 11/28/06, Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote:
>>
>> It's a revision of the flash unit's hardware/firmware to work with a
>> new device, one that didn't exist when the flash unit was designed.
>> That's an "upgrade" in my book.
>
>Well considering the Pentax AF-360 FGZ pre dates the release of the
>K10D by quite some time, and works without any reported problems,
>Sigma obviously did something dodgy if they need to upgrade it to work
>with the new K series DSLR's.

It's not a matter of doing something dodgy, it's a matter of not being 
privy to the infromation that the engineers inside Pentax have when 
they design a camera or flash: The designers of the K10D they had 
access to the actual code used in the AF360FGZ, so they could guarantee 
compatibility.

This kind of thing is particularly tricky when working with something 
like digital communication between a flash and a camera body. As far as 
I know, no one besides Sigma has even tried to make P-TTL-compatible 
flashes for Pentax, probably for precisely this reason.


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