Adapter compatibility · Arri (industry standard) → Pentax / Ricoh
PL to Pentax K adapter compatibility
Mounting a PL (Positive Lock) lens on a Pentax K body — the feasibility verdict, AF / IS / aperture-control / infinity-focus outcome, image-circle relationship, official and reputable third-party adapter SKUs, and the caveats worth knowing before you buy.
Verdict at a glance
Mechanical
Mount specs
Lens side
PL (Positive Lock)
- Flange distance
- 52 mm
- Protocol
- Mechanical only
- Type
- cinema
Body side
Pentax K
- Flange distance
- 45.46 mm
- Protocol
- Pentax K (KAF/KAF2/KAF3/KAF4)
- Type
- DSLR
Flange-distance gap the adapter fills: 6.54 mm (52 mm − 45.46 mm). That gap is what a mechanical adapter has to fill to hold the lens at its design distance from the sensor.
Adapter examples
- generic mechanical adapter ring (multiple vendors)
Caveats
- Mechanical adapter only — no electronic communication between PL (Positive Lock) lens and Pentax K body.
Common questions
- Will PL (Positive Lock) lenses autofocus on a Pentax K body through an adapter?
- Autofocus is not applicable to this pairing — the PL mount predates electronic AF, or the bodies in this family do not implement AF for adapted lenses.
- Does in-lens image stabilization (IS / VR / OS) still work through a PL → Pentax K adapter?
- Stabilisation is not applicable — PL lenses in this family do not ship with in-lens stabilisation, or the adapter pair predates the IS protocol entirely.
- What's the most-recommended PL → Pentax K adapter?
- No SKU in our curated catalogue covers PL → Pentax K yet. Adapter examples photographers commonly use include the generic mechanical adapter ring (multiple vendors). Pair compatibility is mostly mechanical, so any well-built adapter at the correct flange distance should work — pick on build quality and tripod-foot integration.