K-S1 firmware v1.20
Ricoh / Pentax · First seen by GearPulse Jul 4, 2026
What's in this update
Corresponded to [KAF4 lens mount] that is equipped with an electromagnetic diaphragm control system. Enable new lens HD PENTAX-DA 55-300mmF4.5-6.3ED PLM WR RE to shoot stable by updating firmware. Improved stability for general performance.
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