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Fotodiox brass mount adapter connecting Mamiya 645 lens to Pentax K camera

Fotodiox

Fotodiox Mount Adapter Mamiya 645 Lens to Pentax K Mount Camera Accessory

SKU CH-G79Q-9BF7X

Adapts Mamiya 645 lenses to Pentax K cameras with infinity focus and brass construction

  • Preserve image quality with Mamiya 645 to Pentax K mount adaptation
  • Achieve infinite focus for expanded creative possibilities with adapted lenses
  • Durable brass construction with stainless steel finishing ensures secure long-lasting connection
  • Utilise AE priority mode for effortless exposure control on Pentax K cameras
  • Use 645 lenses on 35mm sensors for enhanced edge-to-edge sharpness via sweet spot

Mamiya 645 to Pentax K Adapter

This brass and stainless-steel adapter connects Mamiya 645 lenses to Pentax K mount SLR and DSLR bodies. It preserves the optical quality of medium-format glass while expanding creative options on 35mm and smaller sensors. The leaf-spring mechanism secures the lens firmly for reliable everyday use. Photographers who own legacy Mamiya primes can continue shooting them without buying new lenses.

Infinity Focus and AE Priority Support

The adapter maintains infinity focus so distant subjects remain sharp across the frame. AE priority mode functions normally, allowing the camera to meter and set exposure automatically with the adapted lens. Brass construction resists wear during repeated mounting cycles. Users who need electronic aperture control or autofocus will find those functions unavailable.

Medium-Format Image Circle on Smaller Sensors

Adapting the larger 645 image circle to a 35mm or APS-C sensor uses only the central sweet spot, reducing edge distortion and vignetting. The physical mount depth permits this adaptation without corrective optics. Shooters requiring full-frame 645 coverage or tilt-shift movements cannot achieve them with this flat adapter.

Highlights

  • Preserve image quality with Mamiya 645 to Pentax K mount adaptation
  • Achieve infinite focus for expanded creative possibilities with adapted lenses
  • Durable brass construction with stainless steel finishing ensures secure long-lasting connection
  • Utilise AE priority mode for effortless exposure control on Pentax K cameras
  • Use 645 lenses on 35mm sensors for enhanced edge-to-edge sharpness via sweet spot

Specifications

No published specifications for this item yet.

Questions about this item

Does the brass-and-steel adapter add noticeable weight or heat during all-day shooting?

The adapter is a passive brass-and-stainless-steel mount with no electronics, so it generates no heat and adds only minimal weight to the Pentax K body.

What Pentax K-mount camera body is needed to use this adapter with Mamiya 645 lenses?

Any Pentax K-mount SLR or DSLR body will accept the adapter, letting you mount your existing Mamiya 645 lenses directly.

Will my Mamiya 645 lenses reach infinity focus on a Pentax K body with this adapter?

Yes, the adapter is designed to preserve infinity focus, so your Mamiya 645 lenses focus to infinity on the Pentax K mount.

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