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A History of my Photography

Pentax 67 Lenses


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90mm f2.8 SMC Takumar LS

Top view of the 90mm f2.8 SMC Takumar Leaf Shutter lens. The extra scale at the top in his picture is the shutter speed for the leaf shutter.

    This is one of the two lenses I purchased with the Pentax 67 body. It is equivalent to a 45mm lens on a 35mm camera. This version has a leaf shutter for use with electronic flash. Normally the Pentax 67 has a slow flash sync speed of 1/30 of a second. With this lens you can use shutter speed as fast as 1/50o of a second by using the leaf shutter in this lens.

A little closer view of the shutter speed setting. on the left side is the PC connection for a flash unit.

    This flash will function like a normal lens in ordinary use. To use the leaf shutter you set the camera shutter speed to 1/8 second, connect the flash to the lens rather than the camera body and cock the shutter. After you take the picture you have to wind the film in the camera and cock the lens shutter for each picture.

This is the back side of the shutter speed ring showing the special operation switch. It is in the U for usual position.

    There is a switch on the bottom of the shutter speed ring that allows you to control the leaf shutter independently of the camera shutter and allows multiple exposures, a feature the Pentax 67 camera body does not support. Pentax stopped making these leaf shutter lenses quite a few years back and only make a 165mm leaf shutter lens now.

 

200mm f4 SMC Pentax

Top view of the 200mm f4 SMC Pentax lens.

    On a 6X7 format camera the165 and 200mm lenses are the portrait lenses. I bought the 200mm because I prefer a longer focal length for portraits. This lens is in pristine condition and has shown no problems. The deep recess of the front element make a lens hood unnecessary.

Front end of the 200mm. As you can see the lens element are recessed, making a lens hood unnecessary. This lens uses 77mm Filters

    Despite its large size this lens is very light and doesn't add a lot of weight to my camera bag.

Posterior view of the 200mm lens showing a much wider opening then the wide angle lenses.

 

 

55mm f3.5 SMC Takumar

The huge front element of the 55mm f3.5 Takumar lens. The filter size is a 100mm bayonet.

    I bought my Pentax 6X7 for scenic photography. The photographer I purchased it from only had a 90mm, 160mm, 200mm and 300mm lens for this camera. I bought the 90mm which was a leaf shutter lens and the 200mm from him. I needed a wide angle and this is the first one I bought. This is the original model of this lens, Pentax later redesigned it as a 55mm f4.0 with a smaller front element that takes 82mm filters. I purchased it on eBay and it's condition was excellent. It came in the original case and I think it spent most of it's time in it.

A side by side comparison of the 28mm f3.5 Nikkor and the 55mm f3.5 Takumar Lens. they both cover the same field of view on their respective formats.

    This is a monster wide angle lens for my Pentax 6X7. It is about equivalent to a 28mm lens on a 35mm camera. It works very well for scenic shots. I typically use it at f8 or f11 and zone focus it.

Top view of the 55mm Takumar.

    Pentax uses a slide switch on the lens barrel to perform depth of field preview. This is a holdover from the old screw mount 35mm format lenses. I still remember the slide switch on my Takumar lenses for my Pentax Spotmatic. The lens normally sits at full aperture, the stop down lever brings the lens to shooting aperture. This is different from Nikon where the lens sits at shooting aperture and mounting it on the camera opens it up. One result is that when a Nikon lens gets oil on the aperture blades it is useless because it can't stop down in time. With this design the camera forces the lens to stop down and the oil only slows it opening back up.

Rear view of the 55mm Takumar. Notice that there are only two couplings - the aperture coupling for the TTL Prism on the top, and the stop down lever on the side.

    Another nice feature of the Pentax 6X7 lenses is the availability of adapters for other cameras. Pentax makes an adapter to use these lenses on their 645 series of cameras and another for their K mount cameras. I have seen other adapters to use them on Nikon cameras and for Leica rangefinder cameras with a Visoflex ( a visoflex is a mirror box that mounts onto a Leica rangefinder camera and turns it into a single lens reflex).

 

45mm f4 SMC Pentax

A wide lens in a short package. A 45mm f4 SMC Pentax.

    While the 55m is nice and wide I wanted something even wider. Pentax makes this 45mm as well as a 35mm full frame fisheye. I don't go for the distortion of a fisheye anymore so the 45 mm was my choice.

Front element of the 45mm, it takes an 82mm filter.

    This lens is much smaller and more compact than the 55mm. It's also much lighter. It doesn't take much space in my camera bag but adds a nice wide view.

Rear end of the 45mm showing the small rear element typical of retro-focus lenses use as wide angle lenses on SLR cameras.

 

135mm f4 Macro SMC Pentax

Top view of the 135mm f4 SMC Pentax lens.

    This lens is one of two macro lenses made for the Pentax 67. I bought mine on eBay from the same fellow I bought my 45mm lens from. When it arrived the iris would not stop down so I took it to my local repair shop. They told me it had oil on the blades and would need repair to the iris mechanism. I figured they must have had the iris working to check for oil and then broke it again I extended the lens all the way out on the focusing mount and was able to reach in the rear of the leans and slip the coupling mechanism into place and check the the iris. It did show some signs of hesitation opening back up, a sign of oil on the blades but it was slight and is not a problem with the Pentax since the camera forces the iris closed and only after the picture is taken is a spring allowed to pull the iris open to viewing position. If I was using a motor drive this might be a problem but there is no motor drive for a Pentax 67.

    BTW the vendor I purchased the lens from had offered a full refund on return of the lens but since I had it functional, I found it was not necessary. Also storing the lens nose up allows the oil to have minimum effect and has not been a problem.

The 135mm macro lens with the focus set to closest focusing distance. the top scale show the magnification ratio.

    While this lens is called a macro lens the focusing mount doesn't go to 1:1 magnification, or even 1:2 magnification, but stop at 1:3.2 magnification. To get any closer you have to add extension tubes or a bellows. The Bellows for a Pentax 67 are very rare and very expensive. The extension tubes are much more common. Combined with a standard set of extension tube 1:1 magnification can be achieved.

Front view of the 135mm lens showing the recessed front element making a lens hood unnecessary in most application. This lens uses 67mm filters.

    Like the 200mm lens this lens has its fron element recessed far into the lens body, making the lens fully functional without a lens hood.

Rear view of the 135mm lens showing the simple lens mount.

 

Kenko 2X Teleconverter

Top view of the 2X teleconverter for the Pentax 67

    a Teleconverter is a handy items, especially used with manual focus lenses. Most auto focus systems want a lens of f5.6 or faster to focus properly. The old Mark 1 Mod 1 eyeball is not so fussy. Adding this teleconverter to my lenses gives the following results:

Lens

Becomes

90mm f2.8

180mm f5.6

135mm f4

250mm f8

165mm f4

330mm f8

200mm f4

400mm f8

    While the combinations don't give the fastest results adding one component give me the equivalent of adding three more lenses to my collection.

Font view of the teleconverter showing the dual lens mount with both the internal and external bayonet mount.

    With an internal bayonet connection to the camera the teleconverter has both the internal and external bayonet for mounting lenses.

Rear view showing that the teleconverter provides both automatic iris control and meter coupling.

 

165mm F4 Leaf Shutter Lens

Side view of the 165mm Leaf Shutter lens.

    While visiting a pawn shop near one of the local camera stores I came upon a collection of Pentax 6x7 cameras and lenses. Looking through the selection of lenses I found this one which I had been looking for on eBay. It had been sitting around a while and I negotiated an excellent price with the the pawn shop owner.    
    This lens is the only other leaf shutter lens offered by Pentax for the 6x7 camera. This lens has the reputation of being very sharp, much sharper than the 165mm F2.8 lens. While it is meant primarily for use in the studio with strobe lights it can work without firing the leaf shutter every time.

Here we see the control for the leaf shutter in the lens. The solid circle is the index mark The open circle is the bypass position The numbers are the leaf shutter speeds and the PC connection is clearly visible.

    The leaf shutter mechanism on this lens is much simpler than the one on the 90mm lens. The normal rest state for this lens is with the shutter closed. You must cock the shutter to be able to see through the lens for focusing. If the shutter control ring is in the bypass position the leaf shutter will not fire and the view through the viewfinder will return with the mirror. If a shutter speed is selected the leaf shutter will fire at the proper time during the exposure cycle. When the mirror returns the view will be blank. You must cock the shutter again to see through the camera and lens.

Front view with the shutter controls and the sync socket visible.

    This may seem to nullify the purpose or the instant return mirror, but it provides a very effective reminder to re-cock the shutter. The 90mm lens opens the shutter back up and it is easy to waste film by forgetting to cock the shutter. The other special features of the 90mm Leaf shutter lens are not provided on this lens so it cannot be used for double exposures.

Front view showing the lens itself.

    To take pictures without using the leaf shutter you need to cock the shutter and select the bypass position. The shutter will not fire and will stay open.

Rear View of the 165mm lens.

    Before storing this lens you should fire the shutter by working the lens stop down arm. This will remove tension on the springs in the shutter mechanism.

 

 75mm F4.5 SMC Pentax Wide Angle Lens

Side view of the 75mm Lens

    A return to the pawn shop where I found the 165mm leaf shutter lens provided me with this lens once again below market price. The 75mm is a mild wide angle for the 6X7 format about the same as a 35mm lens on a 35mm camera.

Front view of the 75mm Lens The filter size is 82mm.

    The 75mm lens has the same excellent build quality as the other Pentax 6X7 lenses. This lens uses 82mm filters in either screw mount or bayonet.

Rear view of the 75mm lens

 

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