Pentax's flagship full-frame DSLR — a 2018 refined K-1, the pinnacle of the K-mount system.
The Pentax K-1 Mark II, announced in February 2018, is Ricoh's flagship full-frame DSLR — a refined K-1 that remained the pinnacle of the K-mount system for years, and for many buyers the definitive modern Pentax.
It pairs a 36.4-megapixel AA-filterless full-frame CMOS sensor with a new accelerator unit that extends ISO to a headline 819,200, five-axis Shake Reduction II rated at five stops, Pixel Shift Resolution II with a handheld Dynamic mode, GPS with AstroTracer star tracking built in, a 33-point SAFOX 12 AF system, a 100% pentaprism finder, the unique Cross-Tilt rear LCD and a fully weather-sealed magnesium body with operation assist lights.
Its significance is as the affordable full-frame flagship: no rival offers in-body star tracking or a cross-tilt screen, and decades of K-mount glass mount natively. With Pentax's DSLR-only strategy it remains current far longer than rivals' bodies, and UK used prices sit well below equivalent Canon/Nikon full-framers, sustaining steady demand from landscape and astro shooters.
UK used-buying checks: the aperture-block solenoid issue is far rarer than on APS-C bodies but still shoot a stopped-down burst to rule out black frames; ask for the shutter count against the 300,000 rating; test GPS lock and an AstroTracer dry run since the module is a key reason to buy; work the Cross-Tilt screen through its full range checking the linkage; fire a handheld Pixel Shift frame to confirm SR health; and note many K-1 bodies were officially upgraded to Mark II spec — a converted body is genuine but shows an upgrade sticker in the film-door area, worth confirming against the seller's description.