???? on Vivitar lenses info

SteveinAlaska said:

So I end the summer in Fairbanks Alaska with much more equipment then I started with, along with 12 weeks in a film class at the university. I am learning from my mistakes and most of them seem to be from lenses selection and use. The old internet has become my dictionary/library for info. But I have had no luck in finding a reference on Vivitar lenses such as the ones that were produced in the 25 or so years for film cameras. They have been easy to find here so I have built my collection around them. Is there a website out there somewhere ?? Any help would be appreciated, Thank you.

One last note here- also have in my possession is a Seikanon 500mm mirror lens and I cannot find any info on it also

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