Fotodiox, Inc. USA

Fotodiox Pro Lens Mount Adapter - Contax 645 (C645) Mount Lenses to Pentax K (PK) Mount SLR Camera Body with Built-In Aperture Iris

Fotodiox Pro Lens Mount Adapter - Contax 645 (C645) Mount Lenses to Pentax K - Main image
Fotodiox Pro Lens Mount Adapter - Contax 645 (C645) Mount Lenses to Pentax K - View 2Fotodiox Pro Lens Mount Adapter - Contax 645 (C645) Mount Lenses to Pentax K - View 3
$134.89 $189.99 In stock

Category: Lens Mount Adapter

Features:
  • Mounts Contax 645 (C645) Mount Lenses to Pentax K (PK) Mount SLR Cameras; infinity focus or beyond allowed
  • Integrated adjustable iris to allow some control over depth of field
  • Enhanced craftsmanship and high-tolerance construction for demanding professionals
  • Precise fit and solid connection; lens has no play, gap or wiggling when mounted on adapter and no adjustments required
  • Precision all-metal construction with chrome plated brass mounts for secure and solid fit
  • 24-Month Fotodiox warranty
  • This adapter will severely  Vignette when Iris closes down !

    • Whether you're shooting digitally or on film, Fotodiox offers the world's largest selection of lens adapters. Mix camera/lens platforms or reinvigorate vintage glass; Fotodiox has hundreds of ways to mount lenses onto your DSLR or SLR camera. Our adapters deliver infinity focus, manual aperture control, and a sturdy build for lasting quality.

    Lens Mount: Contax 645 (C645) Mount Lens
    Body Mount: Pentax K (PK) Mount SLR Camera
    Manufacturer: Fotodiox Inc.
    Warranty: 24 Months


    Note:

  • • This is a manual adapter, so lens functions that rely on electronic communication with the camera body (autofocus, AE metering, image stabilization, etc.) will be disrupted.
  • • Some cameras need to be set a certain way to work with our adapters or you may get a message such as 'Error Lens Not Attached - Check lens'. Please check the support articles on the Fotodiox Knowledge Base for possible solutions on a variety of camera brands.
  • • 'Focus-By-Wire' lenses (such as Canon's STM or Nikons AF-P) requires power to engage the manual focus rings on the lens, since manual lens mount adapters do not power the lens, those lenses will not be able to focus.
  • • Set your exposure manually or meter using your camera's Aperture Priority (stop-down) mode.
  • • If your lens does not have a manual aperture control ring, the lens aperture will revert to its default position, which depending on the lens is either stopped down to its largest f-stop or opened up to its smallest f-stop.
  • • To determine what the new 'Crop Factor' or 'Equivalent Focal Length' of the lens when used on your camera will be, please check the Fotodiox Knowledge Base article.

    • All pictures are for illustration purposes only. Actual product may vary slightly due to ongoing improvements in design.

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    Customer Reviews (4.8 / 5 · 5 reviews)

    Jason U. ★★★★★

    Finally got my old Contax 645 lenses working on my Pentax K-1, and the infinity focus is spot-on. The built-in iris actually gives me decent control over depth of field for portraits.

    Violet X. ★★★★★

    The adjustable iris on this adapter is a game-changer for controlling depth of field with my old Contax 645 glass on the Pentax. Finally able to use those beautiful lenses without any focus issues—it locks in tight and feels robust. Minimal play, just how I wanted it.

    Henry ★★★★★

    The built-in aperture iris is a game-changer—lets me actually control depth of field with my old Contax 645 glass on my Pentax K body. Infinity focus locks in perfectly, no fussing required.

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