Topics

Vintage lens needs TLC

Robert L. Cunningham
 

CML Glass-

I own a vintage  Cooke-Varitol 20-100mm lens that Joe Dunton converted to a 40-200 rear-element anamorphic lens in the early 1980’s. It’s labeled as a prototype “patents applied for” lens. 

I need to get this lens serviced, as it has two major issues-
1) the aperture ring is stiff.   
2) at some point internally, the mount and elements are rotated about 2 degrees counter clockwise. So if the front of the lens is level with the ground, the camera would be ever so slightly dutched. It’s not just the mount; when you look at the back element, it is not horizontal. 

So if you had a vintage prototype (one of a kind) lens like this, one that may have odd mixes of Cooke factory and JDC custom parts, who would you trust to work on it?

-R

--
Robert L. Cunningham
Cinematographer
Baltimore based, currently in Maine. 
Worldwide available. 

from here, there, or in the air, so please excuse my brevity, and any errors or autocorrects I didn't catch! 

Karl Kim
 

Duclos Lenses.

On Fri, Sep 28, 2018 at 12:12 PM, Robert L. Cunningham <rlcunn2@...> wrote:
CML Glass-

I own a vintage  Cooke-Varitol 20-100mm lens that Joe Dunton converted to a 40-200 rear-element anamorphic lens in the early 1980’s. It’s labeled as a prototype “patents applied for” lens. 

I need to get this lens serviced, as it has two major issues-
1) the aperture ring is stiff.   
2) at some point internally, the mount and elements are rotated about 2 degrees counter clockwise. So if the front of the lens is level with the ground, the camera would be ever so slightly dutched. It’s not just the mount; when you look at the back element, it is not horizontal. 

So if you had a vintage prototype (one of a kind) lens like this, one that may have odd mixes of Cooke factory and JDC custom parts, who would you trust to work on it?

-R

--
Robert L. Cunningham
Cinematographer
Baltimore based, currently in Maine. 
Worldwide available. 

from here, there, or in the air, so please excuse my brevity, and any errors or autocorrects I didn't catch! 




--
Karl Kim
732-673-7480
Local 600

Tobias Pekelharing
 

True Lens Services would be my strong suggestion: https://www.truelens.co.uk
Lot's of Cooke heritage and knowledge.


Best,


Tobias Pekelharing
Director


Holy Fools Amsterdam www.holyfools.nl
Czar Brussels www.czar.be
Odelay Films London www.odelayfilms.com

On 28 Sep 2018, at 18:12, Robert L. Cunningham <rlcunn2@...> wrote:

CML Glass-

I own a vintage  Cooke-Varitol 20-100mm lens that Joe Dunton converted to a 40-200 rear-element anamorphic lens in the early 1980’s. It’s labeled as a prototype “patents applied for” lens. 

I need to get this lens serviced, as it has two major issues-
1) the aperture ring is stiff.   
2) at some point internally, the mount and elements are rotated about 2 degrees counter clockwise. So if the front of the lens is level with the ground, the camera would be ever so slightly dutched. It’s not just the mount; when you look at the back element, it is not horizontal. 

So if you had a vintage prototype (one of a kind) lens like this, one that may have odd mixes of Cooke factory and JDC custom parts, who would you trust to work on it?

-R

--
Robert L. Cunningham
Cinematographer
Baltimore based, currently in Maine. 
Worldwide available. 

from here, there, or in the air, so please excuse my brevity, and any errors or autocorrects I didn't catch! 

Darryl Wood
 

I specialise in anamorphic. So I can rebuild the lens, add parts that are missing or need rebuilding.

 

Darryl Wood

Mirrorscope

Australia

Office: +61 8 8358 6021

Mobile: +61 409 690 406

 

 

From: Robert L. Cunningham
Sent: Friday, 28 September 2018 5:31 PM
To: cml-glass@...
Subject: [cml-glass] Vintage lens needs TLC

 

CML Glass-

 

I own a vintage  Cooke-Varitol 20-100mm lens that Joe Dunton converted to a 40-200 rear-element anamorphic lens in the early 1980’s. It’s labeled as a prototype “patents applied for” lens. 



I need to get this lens serviced, as it has two major issues-

1) the aperture ring is stiff.   

2) at some point internally, the mount and elements are rotated about 2 degrees counter clockwise. So if the front of the lens is level with the ground, the camera would be ever so slightly dutched. It’s not just the mount; when you look at the back element, it is not horizontal. 



So if you had a vintage prototype (one of a kind) lens like this, one that may have odd mixes of Cooke factory and JDC custom parts, who would you trust to work on it?

 

-R



--

Robert L. Cunningham

Cinematographer

Baltimore based, currently in Maine. 

Worldwide available. 



from here, there, or in the air, so please excuse my brevity, and any errors or autocorrects I didn't catch! 

 

Jeff Kreines
 

Have you contacted Joe Dunton?  This doesn’t sound too complicated. 

Jeff Kreines

Sent from iPhone. 

On Sep 28, 2018, at 11:51 AM, Darryl Wood <smirror@...> wrote:

I specialise in anamorphic. So I can rebuild the lens, add parts that are missing or need rebuilding.

 

Darryl Wood

Mirrorscope

Australia

Office: +61 8 8358 6021

Mobile: +61 409 690 406

 

 

From: Robert L. Cunningham
Sent: Friday, 28 September 2018 5:31 PM
To: cml-glass@...
Subject: [cml-glass] Vintage lens needs TLC

 

CML Glass-

 

I own a vintage  Cooke-Varitol 20-100mm lens that Joe Dunton converted to a 40-200 rear-element anamorphic lens in the early 1980’s. It’s labeled as a prototype “patents applied for” lens. 



I need to get this lens serviced, as it has two major issues-

1) the aperture ring is stiff.   

2) at some point internally, the mount and elements are rotated about 2 degrees counter clockwise. So if the front of the lens is level with the ground, the camera would be ever so slightly dutched. It’s not just the mount; when you look at the back element, it is not horizontal. 



So if you had a vintage prototype (one of a kind) lens like this, one that may have odd mixes of Cooke factory and JDC custom parts, who would you trust to work on it?

 

-R



--

Robert L. Cunningham

Cinematographer

Baltimore based, currently in Maine. 

Worldwide available. 



from here, there, or in the air, so please excuse my brevity, and any errors or autocorrects I didn't catch! 

 

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benedict.bannister@...
 

I would suggest you contact Lester Dunton, Joe's son. He is on the money.

I had my Canon K Series converted from BNC to PL by True Lens Service in Leicester. There's still life in those old dogs!

Benedict Bannister
www.benedictbannister
www.jacksonwoodburn.com

Dom Jaeger
 

These sound like straightforward issues any cine lens repair shop or rental house service department should be able to fix. The combination of a rear anamorphic adapter fitted to an older spherical zoom like a 20-100 is probably something many rental houses have, certainly I've worked on plenty over the years. Try calling around some local rental houses. The prototype part would only be the rear adapter, which is typically screwed on to the Universal mount of the zoom.

The stiff iris is most likely external, and just needs the outer aperture ring cleaned and relubricated.

The optics in the zoom itself are spherical, so they can't be twisted. If the front mask is a little skewed, it just needs realignment, a few set screws. If it's the rear anamorphic adapter that is skewed, that might need a bit more work, but is the actual image skewed when the lens is mounted to a camera?

Dom Jaeger 
Lens Technician
Panavision Melbourne

Matthew Duclos
 

Hey Robert, 

Duclos Lenses has seen plenty of JDC custom jobs in the past. This sounds like a pretty straight forward repair. 
We would be happy to help you out anytime. You can contact me directly at Matthew@... or follow-up with any questions here. 

-
Matthew Duclos
Lens Tech/Geek
Los Angeles, CA

David Stump
 

Was the lens converted from BNC mount?  BNC pin was not 45 degrees of vertical…

Dave Stump ASC
on location Johor Malaysia



On Sep 29, 2018, at 12:12 AM, Robert L. Cunningham <rlcunn2@...> wrote:

CML Glass-

I own a vintage  Cooke-Varitol 20-100mm lens that Joe Dunton converted to a 40-200 rear-element anamorphic lens in the early 1980’s. It’s labeled as a prototype “patents applied for” lens. 

I need to get this lens serviced, as it has two major issues-
1) the aperture ring is stiff.   
2) at some point internally, the mount and elements are rotated about 2 degrees counter clockwise. So if the front of the lens is level with the ground, the camera would be ever so slightly dutched. It’s not just the mount; when you look at the back element, it is not horizontal. 

So if you had a vintage prototype (one of a kind) lens like this, one that may have odd mixes of Cooke factory and JDC custom parts, who would you trust to work on it?

-R

--
Robert L. Cunningham
Cinematographer
Baltimore based, currently in Maine. 
Worldwide available. 

from here, there, or in the air, so please excuse my brevity, and any errors or autocorrects I didn't catch!