Bright vibrant images.
By the way you should check it out on a list of affected lenses but that Pentax lens may be radioactive! Some Super Takumar Pentax lenses used Thorium Oxide in some lens components as it has similar qualities to fluorite.
I found I had one I had never used and disposed of it. If you google radioactive lenses you can find a list of them. The lenses often go yellow.
Greg.
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