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Mount Adapter for Mamiya 645 Lens to Pentax K Mount Camera

Prices as of September 25, 2026, as listed by each retailer — verify the current price on the retailer's site before purchase.

Price history tracked at Macy's price tracker

14-day low
$51.99
Sep 13 · Macy's
Best price
$51.99
−0% vs high
14-day high
$51.99
All stores
$52$52$52
Sep 13Sep 25
  • Macy's
Lowest in 14 days: $51.99 at Macy's. Highest: $51.99. Current best is 0% below the 14-day high.

About this product

The Fotodiox Mount Adapter enables Mamiya 645 lenses to be used on Pentax K mount cameras. This all-metal adapter features a precision leaf spring design for a secure fit and supports infinity focus. It allows manual aperture control via stop-down metering, ensuring accurate exposure in various lighting conditions. The polished surface ensures smooth mounting and durability. While automatic functions like autofocus and diaphragm control are not supported, the adapter maintains optical performance by utilizing the lens's central sweet spot for sharpness and reduced distortion. Ideal for photographers expanding their lens compatibility across formats.

  • All-metal construction
  • Infinity focus capability
  • Stop-down metering support
  • Secure leaf spring fit
  • Wipe clean surface
  • Compatible with Mamiya 645 to Pentax K

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Mount Adapter for Mamiya 645 Lens to Pentax K — Price History