On Thu, Feb 18, 2016 at 11:27 AM, Mark Roberts <postmas...@robertstech.com> 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 have a P-TTL Metz 48 AF-1 that shows the focal length on the LCD. On my APS-C cameras, the focal length displayed on the flash is the 35mm-equivalent focal length. (That is, if I have a 50mm lens on the camera, the flash shows 75mm.) So I think the Pentax flash protocol is working in 35mm focal lengths already, and the APS-C cameras fudge it so the flash covers the APS-C FOV. If the AF540GZ displays the focal length, and it's the true focal length (not 35mm-equivalent), then I would speculate that either the flash is fudging it back to APS-C for display purposes (so you might need a firmware update for display accuracy) or the flash protocol is designed to explicitly support both FF and APS-C (but Metz didn't implement that part of the protocol). Either way, I think you'll be OK as far as the actual flash zoom mechanism is concerned. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
