Archived posting to the Leica Users Group, 2004/01/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Karen, You make an excellent point and I have some older lenses where the balsam is clearly yellowing. However, this particular lens has at least one very yellow element, probably the thick center element in the triplet of a sonnar design. In this case, far more yellow than the one in my very early Summicron or in any of the aero Ektars I have seen. I have only seen one other lens almost this yellow and that was one of the early production Canon 35 F2 FD lenses. Don dorysrus@mindspring.com - -----Original Message----- From: owner-leica-users@mejac.palo-alto.ca.us [mailto:owner-leica-users@mejac.palo-alto.ca.us] On Behalf Of Karen Nakamura Sent: Friday, January 16, 2004 12:52 AM To: leica-users@mejac.palo-alto.ca.us Subject: RE: [Leica] 85mm f2 Russian now a question of Thorium glass >Neal, >I have one of these in LTM and it is stunningly good. However, it >exhibits all the attributes of radioactive glass as it is quite yellow, >to the point that you can not shoot color film unless you want a nice >yellow tone. Yellow can also be caused by the balsam glue used to cement elements together just getting old. It happens in a lot of RF viewfinders. Pain in the neck stuff to get off and get cemented again. Karen - -- Karen Nakamura http://www.photoethnography.com/ClassicCameras/ - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html