mMontag wrote:
Some of the 55/1.2 Asph also have thorium glass - I had one and have viewed several internet responses stating the same - the yellow can be cleared by long duration UV light exposure through the glass.
Thanks for the info. Mine is dated from 1977~1978 and it doesn\'t exhibit any yellow tone. Interestingly, the lens coating do have a golden cast.
Nov 22, 2011 at 09:26 PM
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