[Bob L]

Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here.

---

thanks Bob ! for sharing. Do you know the material of the adaptor (aluminium or brass?) ?

It's anodised aluminium.

[veraikon]

thanks !

[SGBphotography]

I currently own a Pentax 645z and am looking for a dedicated Landscape/Architecture lens around 20mm- 35mm (~18mm-30mm in 35mm format). I am considering the updated HD 35mm for Pentax 645 but I am not too concerned with autofocus so I was looking at 3rd party lenses in order to make sure I have the highest quality lens for this application. What are some lenses from Schneider, Zeiss, and Leica that can be mounted to the 645z and still achieve infinity focus? Also would you say that a 3rd party lens from those I mentioned would be "better" than the updated Pentax 645 hd 35mm? Im looking for a sharp lens with the least amount of distortion. Ive been searching around for weeks so would appreciate any help in this matter.

[Sarnian]

I recently bought a Zoerk Pro Shift Adaptor (eBay item no 192148564858 - sorry, I don't know how to add an image) which I use with the Pentax 67 45mm lens on my 645D. I'm trying to figure out what lens fits the silver-coloured lens adaptor that came fitted to the Pro Shift Adaptor. The seller doesn't know. Any ideas?

[chulx1001]

Does anyone know whether the focus confirmation works when adapting lenses from other systems?

[Adam]

Does anyone know whether the focus confirmation works when adapting lenses from other systems?

I believe it will work with any lens, but the 645 cameras don't have catch in focus.

[veraikon]

The confirmation works (my camera 645N) with all adapted lenses (P6 , Hasselblad V). I have also tested it with a rented 645Z.

[Sarnian]

Does anyone know whether the focus confirmation works when adapting lenses from other systems?

I have a 645D and, yes, the focus confirmation works.

[Adagietto]

I just received a DELTA adapter that was made for the AERO EKTAR 178mm f/2.5 (taken out of WWII era aerial camera). It appears to be made for an M39 camera mount, but since the camera mount is not permanent I am trying to have a camera plate made for the Pentax 67 mount so I can use it on the 67 bodies as well as the 645 bodies (via 67-645 adapter).

Hello, I am new in this forum and this is my first post here.
this is a quiet late reaction to your post but I am interested in the tests that you did to adapt your aero Ektar to your Pentax 645. I would like to do the same. Did you finally find a right way to do it?

Many thanks,

Jean-Philippe

[BostonUKshooter]

I currently own a Pentax 645z and am looking for a dedicated Landscape/Architecture lens around 20mm- 35mm (~18mm-30mm in 35mm format). I am considering the updated HD 35mm for Pentax 645 but I am not too concerned with autofocus so I was looking at 3rd party lenses in order to make sure I have the highest quality lens for this application. What are some lenses from Schneider, Zeiss, and Leica that can be mounted to the 645z and still achieve infinity focus? Also would you say that a 3rd party lens from those I mentioned would be "better" than the updated Pentax 645 hd 35mm? Im looking for a sharp lens with the least amount of distortion. Ive been searching around for weeks so would appreciate any help in this matter.

You can occasionally find the discontinued SMC Pentax DA645 25mm AL (IF) SDM AW on Ebay, usually from Japanese dealers , but be prepared to pay an 'arm and a leg' for it! Opinions on image quality vary from 'amazing' to 'ordinary' depending on experience.....mine is excellent, although I find that a strong level of deconvolution in sharpening, results in a very crisp result. The horizontal angle of view is only a little wider than the 645 28-45mm zoom, but vertical format panos using this lens result in a very wide view, and providing you are careful with levelling and distortion correction, straight lines remain straight.

The only tilt/shift available for the 645 is the 45mm Hartblei, but image quality is 'variable' depending on the age and example you find...when you have become accustomed to the image quality available from the dedicated Pentax lenses (or even the 67 lenses with an adapter), the Hartblei is disappointing for sharpness, especially at the edges.
Good luck! Rgds, Ian

[BostonUKshooter]

I currently own a Pentax 645z and am looking for a dedicated Landscape/Architecture lens around 20mm- 35mm (~18mm-30mm in 35mm format). I am considering the updated HD 35mm for Pentax 645 but I am not too concerned with autofocus so I was looking at 3rd party lenses in order to make sure I have the highest quality lens for this application. What are some lenses from Schneider, Zeiss, and Leica that can be mounted to the 645z and still achieve infinity focus? Also would you say that a 3rd party lens from those I mentioned would be "better" than the updated Pentax 645 hd 35mm? Im looking for a sharp lens with the least amount of distortion. Ive been searching around for weeks so would appreciate any help in this matter.

Alternatively the Arsat 30mm fisheye is a budget option for a few hundred $, but resulting angle of view is narrower when corrected for distortion.....or even the Hassleblad 30mm fisheye via an adapter...same comment as the Arsat, but image quality is obviously better, and price is higher, probably around $1000-1500 depending on model....

---------- Post added 01-25-19 at 10:19 AM ----------

You can occasionally find the discontinued SMC Pentax DA645 25mm AL (IF) SDM AW on Ebay, usually from Japanese dealers , but be prepared to pay an 'arm and a leg' for it! Opinions on image quality vary from 'amazing' to 'ordinary' depending on experience.....mine is excellent, although I find that a strong level of deconvolution in sharpening, results in a very crisp result. The horizontal angle of view is only a little wider than the 645 28-45mm zoom, but vertical format panos using this lens result in a very wide view, and providing you are careful with levelling and distortion correction, straight lines remain straight.

The only tilt/shift available for the 645 is the 45mm Hartblei, but image quality is 'variable' depending on the age and example you find...when you have become accustomed to the image quality available from the dedicated Pentax lenses (or even the 67 lenses with an adapter), the Hartblei is disappointing for sharpness, especially at the edges.
Good luck! Rgds, Ian

Here's a 25mm in Indianapolis!.....Roberts is a good dealer....Pentax SMC AF DA 645 25mm f4 AL IF SDM AW Lens #405 | eBay

[niblue]

I bought a Pentacon-6 to 645 adaptor from Ebay a few years back and that works fine with the 80/2.8 CZ Biometar and 50/4 Flektogon's I have. I've also used those onto K-mount and micro 4/3 cameras by stacking the adaptors although it's a little pointless!

[thomasz08]

Is it possible to have an adapter for Rollei PQ lens to Pentax 645D?

[niceshot]

Pentax Medium Format Resources: Pentax 645: Third party lenses via adapter



Adapting “third party lenses” is in medium format (MF) photography more usual than in 135 photography. The main reason is IMHO the fact that MF photography with interchangeable lenses never was mainstream photography and always a small market. Unlike for 135 systems for most MF systems on economical reasons there are only one manufacturer (mostly the camera manufacturer) who offers lenses for “his” MF system. With a limited number of customers an economical production of special lenses is often not possible. So these lenses are expensive or not will not be built.
From this economical fact comes the necessary reason to adapt “rare” and special third party lenses (or other resources) from a third party manufacturer to the own system.
So MF systems are more open than 135 camera systems. Some MF camera manufactures (e.g. Hasselblad, Pentacon …) offers blind mount for adaptions, some manufactures (e.g. Pentax, Mamiya, Contax or future Leica) have/had adapters for thirds party lenses in their MF portfolio.
Another reason is that MF photography is a “slower” photography than 135 photography. Most adapted MF lens have some restrictions or limitations (no automatic aperture, no electronically communication with the camera). In the “faster”135 photography this may be a major disadvantage, in more contemplative MF photography stop down metering would not be too uncomfortable.

Technical

Pentax 645 cameras have a flange distance (FD) of 70.87 mm. That means from lens mount to film/sensor is a distance of 70.87mm.
Mechanical you can adapt every lens which has
_ a FD higher than 70.87mm
_ a mount diameter which would fit.
_ a image circle which illuminates at least 60mmx45mm

Another restriction is the aperture regulation which has be able mechanical.

Normally adapted lenses have
_ no AF
_ are working with stop down metering (no automatic aperture)
_ and have no electronically communication between lens and camera.


Possible by FD but IMHO not realized are adapters from Rollei 66, Bronica.
An adapter for Mamiya RZ and RB lenses to Pentax 645 camera adapter is announced by Steib (Munich ) and Wiese (Hamburg).

Not possible are those from Rollei SLX (FD 74.00mm) because the lack of aperture regulation.


Medium format cameras like Contax 645 (FD 64.00mm), Hasselblad H, Leica S2 or Mamiya 645 (FD 63.30mm) have a flange distance which is smaller than those of the Pentax645, adapted lenses from these systems would not be able to focus on infinite.



Pentax 67 lenses to Pentax 645

Pentax 67 lenses have a FD of 84.95mm
It is not “third party” so Pentax offers directly an adapter. The aperture of the 67 is automatically stopped down during the exposure. "The aperture value is properly transmitted from the lenses to the camera by a mechanical simulator slider (which many people miss inside the small Pentax DSLRs), but there is no transmittion of a aperture value from the camera to the lenses --> no A-mode. Measurements in M-Mode and Av-Mode are working " (source Klaus123 in this thread)
Pentax 67 Lens to Pentax 645 Body Adapter Reviews - Pentax Lens Reviews & Pentax Lens Database

An overview of the adaptable lenses is given in the review part of this forum.


Hasselblad V-system lenses to Pentax 645

Hasselblad V lenses have a FD 74.90mm.

As I see there are four brands of adapters for Hasselblad V lenses to Pentax 645 cameras on market.
The "brands” are:
_ Kipon, a chinese made adapter
_ Rayq[al] (=Fotodiox?) japanese providence
_ Rugift an east european made adapter (Russian or Ukrainian origin)
_ Zörkendörfer ( “Zörk”), a german manufacturer.

Major lens supplier for this system: Carl Zeiss Oberkochen and Schneider-Kreuznach. There are also lenses from Fuji.
You can use lenses for the so called “Hasselblad V-system” (camera series 200, 500, 2000) with central (C, CF, CFi) or focal shutter (F, FE).

Selection of some Hasselblad V System lenses
Manufacturer: Carl Zeiss Oberkochen (execept Variogaon: Schneider-Kreuznach)
C =centralshutter, F focal shutter, both have the same mount and can be adaptetd to Pentax 645

CF
Distagon CF 30mm (fisheye)
Distagon CF 40mm
Distagon CF 40mm FLE
Distagon CF 50mm
Distagon CF 50mm FLE
Distagon CF 60mm
Planar CF 80mm
Planar CF 100mm
Sonnar CF 150mm
Sonnar CF 180mm
Sonnar CF 250mm
Teletessar CF 350mm
Tele Apotessar CF 500mm [V1]
Tele Apotessar CF 500mm [V2]
UV-Sonnar CF 105mm
Makro-Planar CF 120mm
Makro-Planar CF 135mm
Variogon CF 140-280mm (Schneider)
Sonnar-Superachromat f/5.6 250 mm CFE
Tele-Superachromat f/5.6 350 mm CFE (IF)


FE
Distagon f/2.8 50 mm FE (FLE)
Planar f/2.8 80 mm FE
Planar f/2 110 mm FE
Sonnar f/2.8 150 mm FE
Tele-Tessar f/4 250 mm FE
Tele-Superachromat f/2.8 300 mm TPP FE (IF)
Tele-Tessar f/4 350 mm FE (IF)
Apo Sonnar 4.0/1700mm FE


Pentacon Six [P6] bayonet lenses to Pentax 645

Pentacon Six [P6] lenses have a FD of 74.10mm.
Pentacon* Six [P6] was a Medium Format system which was built originally at Kamera Werke Dresden Germany (KW, later VEB Pentacon) first in the mid fifties (Praktisix). The breech mount was also used by Exakta 66 (West Germany) and the Ukrainian camera Kiev60 (Arsenal in Kiev, Ukraine). From the mid nineties the ukrainian Hasselblad clone Kiev80** was also produced with the P6 mount. Since the nineties the P6 mount has developed to the standard east European MF mount.
Arsenal stopped camera and lens production officially in 2009, but in time before in Kiev a lot of small spin offs manufactures and mechanical workshops (Arax, Hartblei....) offered accessories for the P6 system.

Out of my experience there are no “branded” adapters for P6 lenses to Pentax 645 on market. Most of the adapters on market are no name from small eastern european or chinese mechanic workshops.
I have seen adapters made from aluminium and of brass. IMHO the brass one is more preferable.

Major lens supplier for the P6 medium format system was VEB Carl Zeiss Jena (Germany), Schneider –Kreuznach (Germany), Meyer, Görlitz (later VEB Pentacon) (Germany), Arsenal (Ukraine) and spin offs (Arax, Hartblei…)


VEB Carl Zeiss Jena lenses for P6 :
Flektogon 4.0/50mm
Biometar 2.8/80mm
Biometar 2.8/120mm
Sonnar 2.8/180mm
Sonnar 4.0/300mm
Spiegelobjektiv 5,6/1000
(older lenses Flektogon 2,8/65; Tessar 2,9/80)

There are also P6-lenses from Meyer, Görlitz (later part of VEB Pentacon, lenses renamed in Prakticar)
Primotar E 3,5/80;
Trioplan 2,8/105;
Priotar 3,5/135;
Priotar 3,5/180;
Telemegor (later Pentacon) 4/300;
Telemegor 5,5/400;
Pentacon (and Prakticar) 5,6/500

There are also lenses from Schneider-Kreuznach, Arsenal and Kilfitt
Ukrainian workshops are offering a T/S 45mm lens.

P6-lensesfrom Schneider Kreuznach (Germany)
Curtagon MF 40 4
Curtagon MF 60 3.5
Xenotar MF 80 2.8
Tele-Xenar MF 150 4
Tele-Xenar MF 250 5.6
Variogon MF 75-150 4.5
Variogon MF 140-280 5.6
Special lenses:
PCS Super-Angulon MF 55 4.5 (Shift)
Symmar-S 135 5.6
Symmar-S 180 5.6
M-Componon 28 4
M-Componon 50 4


P6-lenses from Kiev (Ukraine)
Zodiak-8B 30mm 3.5 (fisheye)
Mir-26B 45mm 3.5
Mir-69B (4) 45mm 3.5
Mir-3B (5) 65mm 3.5
Mir-38B 65mm 3.5
Volna-3 80mm 2.8
Vega-12 (10) 90mm 2.8
Vega-28B 120mm 2.8
Kaleinar-3B 150mm 2.8
Jupiter-36B 250mm 3.5
Telear-5B (11) 250mm 5.6
Tair-33 300mm 4.5
Arsat APO MC (12)f/5.6 / 500mm
(please note not all Kiev lenses are multicoated)



* historical remark: the names Pentax and Pentacon have the same historic roots. In the late 40ies Zeiss Ikon Dresden (East Germany) invented the 135 SLR Contax with Pentaprism and M42 thread mount. Because of differences in naming between Carl Zeiss (Oberkochen) (West Germany) and VEB Carl Zeiss Jena (East Germany), in Dresden (East Germany) was decided to brand the SLR in the late 50ies as Pentacon which derives from Pentaprism contax.
Some licences were sold to Asahi Japan which named their SLR as Pentaprism Contax.

Later both SLR brands named the manufacturer.


** There is the possibility to adapt Kiev80 lenses (with “original” Hasselblad F1000 threat mount) to P6.



Exotics to Pentax 645

_Leica Visoflex lenses

Some Leica lenses for the Visoflex system have their origin in Great Format lenses, so the image circle and FD allow adapting these lenses. Leica Visoflex M39 screw mount lens, i.e., 65mm f3.5, telyt 135mm F4, Telyt 200mm F4, 280mm F4.5 and others.
There are no commercial made "direct" adapters known, but there "indirect" ways:
a) Leica Visoflex M39 Lens to Hasselblad Mount Adapter (e.g. rugift) + Hasselblad to P645 adapter

b) Leica Visoflex M39 Lens to Pentax 67 Adapter + Pentax 67 to Pentax 645 adapter



_ Novoflex Schnellschuss System

The “Novoflex Schnellschuss System” was rapid focus system for telelenses from the pre AF era. It was a combination of a rapid focus head with changeable mounts and a tele lens optical system. (there were 400mm and 500 tele lenses from Novoflex and Leica.
Some Hasselblad literature indicates that it can used also on 60x60mm MF cameras. The mount name for Pentax 645 is “TAXPRO”


Mamiya RZ and RB lenses to Pentax 645 camera adapter

Steib (München) and Wiese (Hamburg) are offering a Mamiya RZ and RB lens to Pentax 645 (and Cx 645, Mamiya 645) adapter. It made partial from Mamiya parts, price is about 1100€
source:
HCam-Adapter: Mamiya-RB-/RZ-Objektive an Mamiya / Phase One 645 (aktualisiert) | photoscala

Glad I found this thread

[andrewdoak]

Hi all, first time poster. I'm having difficulty finding what I need, so I am coming to the experts.

"Using Aperture Ring" appears to be a setting on other Pentax DSLRs when using manual lenses, but I do not have that option on my 645D. I'm having a difficult time finding documentation by Pentax or anyone else on the subject. I have a lens mount adapter for M39 lenses to my 645D. I have M39 lenses. I know there must be a few settings in the Menu I need to adjust, and all the videos I have found (here and other places) reference the Using Aperture Ring setting. My 645D doesn't have that as a setting option. Does anyone have any advice/guidance? I've searched this forum for my exact issue and have yet to find it (if it exists, I apologize in advance).

I think I'm in the right thread. Thank you for the help.

Andrew