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03-15-2019, 02:47 AM   #1
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Is there any Tessar Lens available for Pentax 6x7?

Hello

I am looking for a Tessar type lens for may 6x7/67 - but for original lens ther are no section viewa available and for 3rd party I am not sure how these may be adapted.

03-15-2019, 06:11 AM   #2
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The P67 flange focal distance is listed at 84.95mm. Yes, there are various lens adapters, but while some lenses may fit, there may be optical compromises for this quest. Example: I have both Hasselblad V & Pentax 67 ( and P645 etc) and have used both extensively. Attaching a Zeiss (Tessar) 160mm f/4.8 V lens to the P67 can be physically done & full negative coverage would be okay, maybe. All the Hassy V lenses will add this because their design is about 10mm shorter length compared to P67. Next: cost of lenses & adapters compared to Pentax Takumars? My opinion is that most P67 lenses are very good to excellent quality and can be acquired for a reasonable spend. I understand the “tessar” mystique, and i still shoot film with my V system ‘cuz I like it and the square format! But the P67 rules sometimes too!
03-15-2019, 11:35 AM   #3
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The Pentax 120mm soft is a Tessar design. Their 135 macro is similar to a Tessar design ( Dynar).
03-15-2019, 08:24 PM - 1 Like   #4
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My first P67 lens was the 135mm macro lens! Excellent images! I still use it.

03-15-2019, 09:27 PM   #5
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Thank you for your info. I have the 135 and will look for the Tessar Aspects in that use in future. As an exotic one I have the 120 on my list.
03-17-2019, 10:20 PM   #6
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QuoteOriginally posted by klaus123 Quote
As an exotic one I have the 120 on my list.
Above f/8 the 67 120/3.5 works like a regular lens with no soft focusing effect. Worth looking into as a long "normal" lens.

Phil.
03-18-2019, 06:36 PM   #7
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QuoteOriginally posted by desertscape Quote
The Pentax 120mm soft is a Tessar design. Their 135 macro is similar to a Tessar design ( Dynar).

What else is lurking in there?
I thought the entire Pentax 6x7 and 67 lens stable has Tessars, Distagons and Biogons in their designs.
03-18-2019, 07:03 PM   #8
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I never did this with my P67, but I did with my Pentacon Six cameras: bore a mounting hole in a body cap, install a barrel lens in the hole, and mount the body cap on a bellows. If the lens is long enough, infinity focus is possible. I did it with a 139mm Bausch and Lomb Tessar Ic, made no later than the early 50’s. I used that lens originally for enlarging from 4x5 on an Omega D2.

But there are Tessars and there are Tessars. This one has rather unpleasant rendering of out-of-focus secular highlights.

Still, it’s a trick that works with any barrel lens with a large enough image circle, if you are willing to find a bellows. It would probably also work with the helicoid extension tube but for a narrower range of focal lengths. A reversing mount and a solid metal filter stack female cap is a little more elegant than the body cap.

There were zillions of Tessar variants—Ilex Paragon, B&L Tessar, Calumet/Ilex Caltar, Kodak Ektar and Commercial Ektar, Wollensak Raptar, Graflex Optar (really a Wollensak)—all of which used the Tessar formula.

Rick “not that big a fan of the Tessar look” Denney

6 Days Ago   #9
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QuoteOriginally posted by Silent Street Quote
What else is lurking in there?
I thought the entire Pentax 6x7 and 67 lens stable has Tessars, Distagons and Biogons in their designs.
The German heritage is quite obvious in the 67 designs, with only a few exceptions. The 75 Takumar is a French design and the most recent designs seem to be of Pentax's own making (the zooms, 300/400 EDIF and 75AL).
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