Well there doesn't seem to be a problem when using the FGZ flashes with the 645 digital cameras. The zoom head is set to the proper coverage for the lens and format, I expect it will be the same for the K-1. That will probably be complicated by the K-1 supporting both APS-C and 24-36mm formats, (we have got to come up with a better terminology than full frame or 35mm format for digital cameras), but the coding isn't all that difficult to imagine, and wouldn't be that difficult to implement.

I'm pretty sure that the firmware for the 645z and K-3 better than 90% identical.

The same is probably true for the K-5 series and 645D.

Pentax does that, leveraging the hardware and software for the K series and 645 series cameras off each other.

On 2/18/2016 11:27 AM, Mark Roberts wrote:
Here's a question I haven't seen asked (or answered) yet: How will the
zoom head on flash units like my AF540FGZ respond to the K-1 and its
wider field of view (for the same focal length) than APS-C cameras?

I would hope either the camera or the flash makes the necessary
adjustments without the end user needing to do anything like update
firmware or buy a new flash unit.



--
I don't want to achieve immortality through my work; I want to achieve 
immortality through not dying.
-- Woody Allen


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