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09-14-2014, 06:33 AM   #1
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Pentax k511 with AF 260 SA flash

Hi

I have just bought a Pentax k511 camera. Is it possible to use the Pentax AF260SA flash unit with this camera.

Charlieb

09-14-2014, 06:39 AM   #2
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Yes, you can use the flash, however, the exposure will have to be set 100% manually.

(BTW, it's a K-5 II or 2, not 11)

Adam
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09-14-2014, 02:11 PM   #3
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I am not wanting to directly contradict Adam, but your level of compatibility may be fairly high. Although your flash does not support P-TTL metering, it does use the older analog non-TTL protocols. Your K-5 II should support your flash in much the same way as the cameras it was originally designed for though as an undocumented feature*. What this means:
  • The AF 260 SA has its own built-in light sensor and can control the flash intensity
  • Flash ready indicator in the viewfinder and live mode are supported
  • Proper exposure achieved is also supported
  • In P mode, it will automatically set the aperture appropriate to the set ISO as well as shutter speed. The You can override both aperture and shutter speed up to the x-sync.
  • In Tv mode, it will still set the correct aperture while you are free to set the shutter speed. The camera will limit you to valid x-sync speeds.
  • Sv mode is similar to Tv mode except that the shutter speed is controlled by the flash
  • TAv mode is unpredictable
  • In Av and X mode you will have to set the aperture to the value appropriate for the camera's ISO based on the table in the user manual (available for download from Ricoh Imaging). The body will still set an appropriate shutter speed.
    AF 260 SA Manual
  • In M mode you have to set both the aperture and shutter speed (less than 1/180s)
  • Green button works as a reset
  • The set shutter speed may be balanced against the ambient light depending on mode
Sv mode is arguably the most flexible option.

Mount your flash to your K-5 II in P mode and turn it on. It should behave as noted above.** If not, M and X modes should still be usable. All modes should be safe for both camera and flash.

Steve

* This level of backwards compatibility is apparently a legacy feature dating to the first P-TTL cameras in about 2001

** The above is based on known behavior of the AF 280 T model in "Auto" mode. The AF 260 SA was intended for a subset of the cameras supported by the AF 280 T and for the shared features, should behave the same.

Last edited by stevebrot; 09-14-2014 at 06:04 PM. Reason: Clarified some points
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