    
Padmakar Srivastava
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 22, 2005 - 03:27 pm: | 
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Can I put a rear lens element of an old Tessar lens with its metal housing in the oven to eleminate separation. The element is installed in the metal housing by burnishing the metal. I cannot get it out without major surgery. Would the different thermal coefficients of glass and metal not put an excessive stress and crack the glass? However, I think that the coefficient of thermal expansion of metal would be more than the glass, therefore, metal will expand more than glass wthout any harm to glass, but I am not sure. Can some one help me. Thanks. |
