Is there any Tessar Lens available for Pentax 6x7?

klaus123 · 03-15-2019, 02:47 AM

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.

**jeffdrew** · 03-15-2019, 06:11 AM

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!

desertscape · 03-15-2019, 11:35 AM

The Pentax 120mm soft is a Tessar design. Their 135 macro is similar to a Tessar design ( Dynar).

**jeffdrew** · 03-15-2019, 08:24 PM - **1 Like**

My first P67 lens was the 135mm macro lens! Excellent images! I still use it.

klaus123 · 03-15-2019, 09:27 PM

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.

**gofour3** · 03-17-2019, 10:20 PM

Originally posted by klaus123

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.

Silent Street · 03-18-2019, 06:36 PM

Originally posted by desertscape

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.

**rdenney** · 03-18-2019, 07:03 PM

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

desertscape · 03-19-2019, 06:04 PM

Originally posted by Silent Street

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).

03-15-2019, 02:47 AM	#1
klaus123 Senior Member Join Date: Apr 2011 Location: Germany Posts: 238	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.

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03-15-2019, 06:11 AM	#2
jeffdrew Loyal Site Supporter Join Date: Oct 2015 Posts: 102	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
desertscape Pentaxian Join Date: Feb 2009 Location: Arizona Posts: 1,272	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
jeffdrew Loyal Site Supporter Join Date: Oct 2015 Posts: 102	My first P67 lens was the 135mm macro lens! Excellent images! I still use it.

03-15-2019, 09:27 PM	#5
klaus123 Senior Member Join Date: Apr 2011 Location: Germany Posts: 238 Original Poster	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
gofour3 Site Supporter Join Date: Oct 2008 Location: Vancouver, Canada Posts: 8,090	Originally posted by klaus123 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
Silent Street Veteran Member Join Date: Nov 2011 Location: Castlemaine, Victoria, AUS Photos: Albums Posts: 1,151	Originally posted by desertscape 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
rdenney Site Supporter Join Date: Feb 2018 Location: NoVA Posts: 635	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

03-19-2019, 06:04 PM	#9
desertscape Pentaxian Join Date: Feb 2009 Location: Arizona Posts: 1,272	Originally posted by Silent Street 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).