The shame of it is, you can generally clear a lens like that by just leaving it in the sun for a few weeks. Heavy doses of UV clear up the yellowing in a lot of that old glass. And that Takumar is a sweet lens. Oh well...at least he got some good pictures of his "repair".
Maybe I'm being too anal, but seems a disgusting thing to do to a lens that, even if the elements were completely unusable, would still be of use to someone for parts.
Strangely, while the text of the page inferred that the problem was just the lens element yellowing, I would expect they were aware of the cure.
An interesting technique, but I am concerned a bit about his "form". Note the extreme contortion of his back... certainly an opportunity for a back strain injury.
My suggestion is to use this lens repair technique ONLY after the workplace has had a full ergonomic evaluation and the necessary corrections are made. As always, the appropriate safety equipment should be used.
Ah, now I see it. I haven't been using the right tool for the job. Wouldn't it be more effective though, to use an anvil rather than a stump? I think you would achieve better compression.
Dr. Harter you need to call in sick next call weekend. I know, you can't let the crew down but wouldn't a weekend of photographing do wonders for yourself?
Honestly, there is a list so long that it would crash this forum's servers of things that I would love to treat to this "fix" - but I can say equally honestly, a lens was never on it. Seems like a shame to break aperfectly good lens that a little sunlight could fix.
Of course, it could be posted on eBay - I can see the caption:
"I know nothing about cameras, and although there is some damage to the glass, I am told it will in no way affect image quality..."
OH NO! DON'T DO IT! Send all your yellow lenses to me, I'll use em just as they are. Many people use yellow filters and pay dearly to have a quality filter. How much better can it get than a built in filter, made of quality radio active glass.
SEND YOUR LENSES TO ME???? PLEASE PLEASE PLEASE????????? My Spotmatic will thank you.