Hi, all.
><< There are silvernose 50/1.4's that are not radioactive though, and
>the SN
>of the change has not been determined. >>
>
>It may correspond to a serial number gap at 180,000. Thus, serial
>numbers
>less than 180,000 would be radioactive and quite good performers in
>the
>center of the field. It would be a useful exercise to determine if
>any over
>180,000 have yellowed.
>
>Gary Reese
I've got a silvernose 50/1.4 (1339xx) that isn't yellowing at all...
I *can't* see any yellowing thru the following "old" Zuikos:
BLACKnose 55/1.2 (1412xx)
BLACKnose 50/1.4 (7583xx)
silvernose 50/1.8 (1524xx)
silvernose 50/1.8 (3447xx)
silvernose 28/3.5 (1152xx)
silvernose 85/2 (1078xx)
However, there is a *slight* yellow tint thru these Zuikos:
silvernose MC 35/2 (1106xx, detected several years ago)
silvernose 50/1.4 (1229xx, somewhat hazy also)
And a tiny bit *more* yellowing thru a silvernose 35/2.8 (1270xx)
But none of these lenses look as yellow as my Tamron SP 28-135/4-4.5 -- but
it seems to be typical on this model, though.
Have fun,
...
Carlos J. Santisteban
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