Cooke 20-100 Zoom

[Alexis Hanawalt]

I just bought a used Cooke 20-100 on eBay, formerly owned by Otto Nemenz - came in the case with rods, etc. Looks to be in great condition. This is my first owned lens. Does anyone have any recommendations for where I can take it for a "general checkup?" (Collimation, etc.) - in the LA area?

 

Also, there's a little rubber ring covering a slot near the back end of the lens - no idea what this is...

[David Mullen ASC]

Well I suppose Otto's might do it for you...

 

"Cinewalt", the forum rules (since you joined in 2005) now require that your Display Name be a real first & last name -- you can go to My Controls and edit it. Thanks.

[Charlie Peich]

I just bought a used Cooke 20-100 on eBay, formerly owned by Otto Nemenz - came in the case with rods, etc. Looks to be in great condition. This is my first owned lens. Does anyone have any recommendations for where I can take it for a "general checkup?" (Collimation, etc.) - in the LA area?

 

Optiteck

 

Duclos Lenses

 

Focus Optics

 

Cooke in the US

 

Now remember to update your name as requested by David Mullen ASC!

[Stephen Williams]

Also, there's a little rubber ring covering a slot near the back end of the lens - no idea what this is...

 

Hi,

 

It's a gelatin filter holder, if you only have the ring a small bit it missing.

 

Stephen

[Alexis Hanawalt]

It's a gelatin filter holder, if you only have the ring a small bit it missing.

 

I'm pretty sure it's the whole thing - it has a little bit of plastic that slips into the slot, with a slit in it that could hold a gelatin filter. (slits and slots... very technical.)

 

Seems like there's a risk that if the filter fell out, you'd have difficulty retrieving it - and seems like the risk of getting dust or moisture into the lens via the slot is good reason to leave the plastic ring alone... nevertheless, are there specially made filters that go into this slot - or is it just a cut your own kind of thing?

 

-AH

Edited April 15, 2007 by Alexis Hanawalt

[Stephen Williams]

I'm pretty sure it's the whole thing - it has a little bit of plastic that slips into the slot, with a slit in it that could hold a gelatin filter. (slits and slots... very technical.)

 

Seems like there's a risk that if the filter fell out, you'd have difficulty retrieving it - and seems like the risk of getting dust or moisture into the lens via the slot is good reason to leave the plastic ring alone... nevertheless, are there specially made filters that go into this slot - or is it just a cut your own kind of thing?

 

-AH

 

Hi,

 

There is an 20-100 on EBAY now, the filter holder is shown. Cut the filter yourelf & tape it to the top & bottom of the holder, no way will it fall out.

 

Stephen

[Alexis Hanawalt]

There is an 20-100 on EBAY now

 

Interesting - I guess I am missing the little holder piece that the gel is design to slip into.

[Charlie Peich]

Interesting - I guess I am missing the little holder piece that the gel is design to slip into.

 

Contact ZGC, Cooke in the US. for a replacement.