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Pentax K-mount lenses are popular for adapting since they’re affordable and plentiful secondhand, and Fujifilm X-mount’s short flange distance makes them an easy adapter target. All of these are simple mechanical (non-electronic) adapters — you’ll shoot in full manual mode with aperture control on the lens or adapter ring.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | K&F Concept Pentax PK to Fuji FX Adapter | $20-$30 | Amazon · eBay |
| 2 | Fotodiox Pentax K to Fujifilm X Adapter | $30-$40 | Amazon · eBay |
| 3 | Fotasy Pentax PK Lens to Fuji X-Mount Adapter | $15-$25 | Amazon · eBay |
| 4 | Vello LA-FX-PK Pentax K to Fujifilm X-Mount Adapter | $30-$40 | Amazon |
| 5 | Vello LA-FX-PK-A Pentax K to Fujifilm X Adapter with Aperture Control | $40-$55 | Amazon |
| 6 | KIPON PK-FX Adapter | $50-$70 | Amazon · eBay |
| 7 | Novoflex FUX/PENT Adapter | $90-$120 | Amazon |
The picks, in detail
K&F Concept Pentax PK to Fuji FX Adapter
The most widely used budget adapter for this pairing, with a matte anti-reflection interior.
- Precision brass mount
- Matte anti-reflective coating inside
- Fits X-Pro1, X-E1, X-M1 and later X bodies
- Great value for the price
- Widely reviewed with consistent quality
- No aperture-control ring for lenses without one
Fotodiox Pentax K to Fujifilm X Adapter
A reliable all-metal adapter from an established third-party mount-adapter brand.
- All-metal construction
- Precise infinity focus calibration
- Compatible with all Fuji X bodies
- Sturdy build quality
- Trusted brand with long track record
- Pricier than K&F Concept’s basic version
Fotasy Pentax PK Lens to Fuji X-Mount Adapter
A no-frills budget adapter that covers the basics for manual-focus shooting.
- Aluminum alloy body
- Simple mount-and-shoot design
- Compatible with all Fuji X mirrorless bodies
- Very affordable entry point
- Good for occasionally adapting old K-mount glass
- Build quality is basic compared to premium brands
Vello LA-FX-PK Pentax K to Fujifilm X-Mount Adapter
A well-regarded mid-range adapter sold through B&H, known for consistent infinity-focus accuracy.
- Precision-machined mount
- Consistent infinity focus
- Compact, low-profile design
- Reliable focus calibration out of the box
- Backed by a well-known photo retailer’s own brand
- Limited availability outside B&H
Vello LA-FX-PK-A Pentax K to Fujifilm X Adapter with Aperture Control
Adds an aperture-control ring for K-mount lenses that lack their own aperture ring.
- Built-in aperture control ring
- Precision-machined mount
- Compact design
- Essential if using A-series Pentax lenses without an aperture ring
- Solid build quality
- More expensive than the non-aperture-control version
KIPON PK-FX Adapter
A premium precision adapter from a specialist mount-adapter manufacturer.
- High-precision CNC machining
- Smooth, tight mount tolerance
- Durable long-term build
- Excellent build precision
- Well-regarded among adapter specialists
- Premium pricing for a manual adapter
Novoflex FUX/PENT Adapter
A German-made premium adapter aimed at users who want the tightest tolerances and best long-term durability.
- German precision engineering
- All-metal construction
- Reinforced locking mechanism
- Top-tier build quality and durability
- Very secure lens mount with no wobble
- Significantly pricier than budget alternatives
Buying tips
- If your Pentax lens is an older K/M-series without its own aperture ring, get an adapter with a built-in aperture control ring (like the Vello LA-FX-PK-A).
- These are all manual mechanical adapters — autofocus and electronic aperture control won’t work.
- Double-check infinity focus with your specific lens after buying; cheaper adapters occasionally need minor shimming.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.