Ricoh / Pentax K-1

Ricoh / Pentax K-1 firmware

Ricoh / Pentax · K-1 · Body

Latest firmware for the Ricoh / Pentax K-1 is v2.51.

K-1 specifications

Body type
Mid Size SLR
Resolution
36.4 MP
Sensor
CMOS
Sensor size
35.9 × 24 mm
Processor
PRIME IV
ISO range
100–204800
Fastest shutter
1/8000
Burst rate
4.4 fps
Battery life
760 shots (CIPA)
Storage
Dual SD/SDHC/SDXC (UHS-I)
Video
MPEG4, H.264
Mount
Pentax KAF4
Weight
1010 g
Dimensions
137 × 110 × 86 mm
Weather sealed
Yes
Price at launch
$1799

K-1 firmware changelog

  1. v2.51 first tracked

Firmware history

  1. Version 2.51 Latest First seen Jul 4, 2026
    Show release notes

    Improved accuracy of the star-trac​king 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 re​store 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.
    Release notes & download

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