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Pentax 67 Lens to Pentax 645 Body Adapter

Reviews Views Date of last review
7 21,172 Sun January 8, 2017
Recommended By Average Price Average User Rating
100% of reviewers $139.86 9.57
Pentax 67 Lens to Pentax 645 Body Adapter


This adapter allows use of 67 lenses on 645 bodies in full manual and Av exposure modes.

It can be stacked with the Pentax 645 to K-mount adapter as well, but the aperture simulation and autodiaphragm is lost.

Pentax 67 Lens to Pentax 645 Body Adapter
Image Format
645 film
Lens Mount
Pentax 645
Light Loss
0 stops
0 elements, 0 groups
Mount Variant (Rear)
645 A
Mount Variant (Front)
Inner/Outer Bayonet
Weather Sealing
Diam x Length
Production Years
Engraved name: PENTAX ADAPTER 645 FOR 6X7 LENS
This adapter allows for mounting Pentax 6x7 lenses on a Pentax 645 camera.
The adapter supports open aperture metering and M and Av exposure modes in addition to Bulb.
Medium-Format Support
Price History:

Add Review of Pentax 67 Lens to Pentax 645 Body Adapter
Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-7 of 7
New Member

Registered: October, 2016
Posts: 7
Lens Review Date: January 8, 2017 I can recommend this lens: Yes | Price: $150.00 | Rating: 9 

Pros: Full automatic functions
Cons: Release button - it is a bit fuzzy

I've used it a lot with my non-autofocus 645 bodies. It works perfectly and exposure was always correct. Shooting with 90mm lens on 645 is very close to a standard lens FOV. It is very convinent to keep only 67 lenses and use 645 body as backup camera. Some examples about crop factor here.
Senior Member

Registered: March, 2007
Location: Denmark
Posts: 216
Lens Review Date: May 4, 2016 I can recommend this lens: Yes | Price: $50.00 | Rating: 9 

Pros: build quality, sturdyness
Cons: price, lens release a bit hard to manipulate

Super quality and a perfect fit. I can only give it a 9, though, as the price new is quite steep.
New Member

Registered: August, 2015
Posts: 1
Lens Review Date: February 20, 2016 I can recommend this lens: Yes | Price: $100.00 | Rating: 9 

Pros: Stable, nice anti-reflective finish
Cons: Durability of the button to release lens

This provides conversion from 67 mount lens to 645 body including digital bodies (i.e. 645D or 645Z). The built quality is fancy and finish is good; the finish inside gives minimum reflection and thus reduction of contrast.

I remember original instruction advises that M* 400 and M* 800 should not be used at full aperture since it might cause vignetting; these lens should be stopped down 1-stop. Digital camera should be less problematic since both 645D and 645Z has smaller sensor size compared to 645 film; thus vignetting cannot be seen; actually, I have M* 400 and 645D, have tested at full aperture, found no problem at all. Maybe I simply didn't notice vignetting though I would say you can use full stop with this combination. M* 800 might cause a problem even with digital camera, but I simply have no idea.

One thing I would suggest Pentax is to change the structure of the button to remove lens; this internally has a mechanism to convert direction of movements; one is parallel to optical axis and the other is perpendicular to that. The conversion is done by a tiny metal plate being bent after a while which is a problematic. If you are skillful, fortunately, this piece of metal could be modified so that it becomes functionally correct. You simply need to take off three screws on the side of the adapter, carefully open (so that the piece wouldn't be lost) and put the piece, modify, tighten the screw; that's it. I don't think Pentax changes this as 67 lens has been discontinued in 2008, thus selling 67 - 645 adapter doesn't make sense (however, this adapter is still available at least in Japan and is assembled in Vietnam; so I would guess Pentax is still making this product).

In the used market, most of them are made in Japan (they say "JAPAN" below the red dot used when mounting on 645 camera), but there is one assembled in Vietnam (they say "ASSEMBLED IN VIETNAM" at the opposite side of red/white dots). The built quality is identical though the color of the font (PENTAX ADAPTER...) is slightly different; the finish (black paint outside) is a bit different as well. I'd prefer one made in Japan, but it is true that those copies have been used for a long time and you might need maintenance (as described above). Any question regarding to this adapter is welcome; please do not hesitate to send me a message.
Inactive Account

Registered: December, 2012
Location: Germany
Posts: 2
Lens Review Date: December 23, 2012 I can recommend this lens: Yes | Price: $179.00 | Rating: 10 

Pros: build quality, super easy handling, fits perfect
Cons: none

I bought it at eBay and came without caps.
There isn't much new to say: The adapter is a used item but nonetheless of wonderful condition, fits perfectly to my 645N and is easy to remove again both, from the camera and the 67 lens.

Registered: December, 2010
Location: santa monica
Posts: 412
Lens Review Date: June 16, 2012 I can recommend this lens: Yes | Price: $140.00 | Rating: 10 

Pros: build quality, snug confident fit
Cons: release pin gets sticky

These adaptors are great using P67 lenses on 645D cameras. If i could afford it , i would buy one for every 67 lens i own to reduce all the changing in the field. I have three now and they both are the best lens adaptors i have ever used.
Senior Member

Registered: June, 2010
Location: Hamburg
Posts: 267
Lens Review Date: June 16, 2011 I can recommend this lens: Yes | Price: $150.00 | Rating: 10 

Pros: only pros
Cons: no cons

Excellent for your sharp 67 lenses. I tried out 100mm Macro, 45mm and 75mm - all stunning.
Veteran Member

Registered: February, 2011
Posts: 573

1 user found this helpful
Lens Review Date: April 25, 2011 I can recommend this lens: Yes | Price: $210.00 | Rating: 10 

Pros: Well made
Cons: None

Well made and light. Works with the Pentax 645D. The aperture of the 67 is automatically stopped down during the exposure, but the aperture value is not communicated to the camera.
Add Review of Pentax 67 Lens to Pentax 645 Body Adapter

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