New Firmware Update (Version 2.51) for the PENTAX K-1 Mark II

A new Firmware Update (Version 2.51) for the PENTAX K-1 Mark II has just been released. [Changes to V2.51 from 2.50] [Corrected items]

Improved accuracy of the star-tracking for Astrotracer shooting when “2 Type 2” is selected under Menu Item C, “6. Bulb（B）Mode Options.”
Improved stability for general performance.

* When this update is done, the contents of version 2.50 and earlier will be also updated. * When this update is done, you will not be able to restore back to version 2.50 or earlier. * This firmware includes open-source software. The applicable licenses are described in the text files included in the download. PENTAX K-1 Mark II Firmware Download Link: https://www.ricoh-imaging.co.jp/english/support/digital/k-1-2.html

Updated October 07, 2026

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