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Metal lens adapter with brass body and stainless steel finish connecting Contax 645 lens to Sony Alpha DSLR camera

Fotodiox

Fotodiox Contax 645 Lens to Sony Alpha DSLR Mount Adapter

SKU CH-85J6-Z638P

Allows Contax 645 lenses to mount on Sony Alpha DSLR bodies with infinity focus and built-in iris control

  • Preserve lens optics for professional-grade clarity
  • Achieve infinity focus for landscape and astrophotography
  • Durable brass construction with stainless steel finish
  • Automatic exposure priority simplifies shooting control
  • Leaf spring design eliminates play between lens and body

Adapt Contax 645 Lenses to Sony Alpha DSLR

This adapter lets photographers mount Contax 645 medium-format lenses onto Sony Alpha DSLR bodies. It is built for shooters who want to keep using their existing glass without buying new native lenses. The all-metal brass construction with stainless steel finish provides a secure, wobble-free connection.

Check Lens Mount and Electronic Contacts

Verify that your lenses use the Contax 645 mount and that your camera is a Sony Alpha DSLR model with the corresponding A-mount. The adapter includes a built-in iris for aperture control because the lens aperture ring is not electronically coupled to the body. Autofocus and electronic metadata transfer are not supported.

Suited for Manual-Focus Creative Work

This adapter suits photographers comfortable with manual focus and stop-down metering who want the characteristic look of Contax 645 optics on a 35mm sensor. It is not for users who require autofocus, electronic aperture control, or EXIF data recording from the lens. Builders needing a second card or wireless tethering should look elsewhere.

How it compares

Measured against everything we stock in Camera Extras & Accessory Packs, at today’s prices. Recalculated every night.

Price $116.99
Pricier than about 77% of the 2,266 comparable items (median $39.99).

Specifications

No published specifications for this item yet.

Questions about this item

What comes in the box with the Fotodiox Contax 645 to Sony Alpha adapter, and do I need anything else to mount my lenses?

The adapter itself is supplied; it connects Contax 645 lenses directly to any Sony Alpha DSLR body without extra parts.

Which version of this adapter should I choose for my Contax 645 lenses?

This single model is built for the Contax 645 mount and Sony Alpha DSLR mount, so no other version is required.

What does the built-in iris actually do when I shoot with a Contax 645 lens on a Sony Alpha body?

The integrated iris lets you stop down the aperture manually, giving exposure control even though the lens has no electronic link to the camera.

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