"Ian Anderson" wrote in message
...

The super-Takumar images are perceptibly yellow, nothing that can't be
corrected,


Most unusual to find a yellowed Super Takumar. Pentax did not include
Thorium in the 1.8s, just the 1.4s. Although they WERE adding multicoating
in some of the late runs of Super-Takumar lenses; I wonder if they were also
experimenting with rare earth glass??

I have 4 of the f/1.8 and the scaled-down version, the f/2.0 lenses, and all
of them are free of the yellowing that plagued the 50mm f/1.4. Quite odd to
hear that the 55mm normal lenses might also have suffered from this problem.