Cooking a Pro Tessar to re cement it

darinwc

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Joined

Dec 14, 2003

Messages

3,154

Location

Sacramento,

Format

Multi Format

• Nov 8, 2019

• #1

Quite a few pro Tessar lenses have serious de laminating of the elements. Has anyone tried cooking the lens to re cement it?

 

Nodda Duma

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Joined

Jan 22, 2013

Messages

2,685

Location

Batesville, Arkansas

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Multi Format

• Nov 8, 2019

• #2

If you’re talking about warming up the lens to melt and reflow the balsam... it won’t work like you’d hope.

You have to separate the elements, clean the old adhesive off, and reapply the adhesive properly to fix separation.

 

shutterfinger

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Joined

Feb 25, 2013

Messages

5,020

Location

San Jose, Ca.

Format

4x5 Format

• Nov 8, 2019

• #3

Read and follow the information at http://skgrimes.com/library/old-news/old-lenses-can-be-restored-by-re-cementing

 

Jon Goodman

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Joined

Jul 22, 2005

Messages

689

Location

Dallas, TX

Format

35mm

• Jan 1, 2020

• #4

I wrote about this a few years ago (with images). It was shared on several forums as far away as Romania. Here it is: http://forum.mflenses.com/re-cementing-doublet-elements-with-canadian-balsam-t34467.html