Результатов: 7

Radioactive Glass: Can Using Vintage Lenses Ruin Your Photos?

Some lenses produced from the 1940s through the 1970s were treated with radioactive thorium oxide to curb chromatic aberration. But as Andrew Walker explains in this 7.5-minute video, modern digital cameras can actually “see” that radiation as image noise that has the potential ruin your long exposures. There are a significant number of lenses produced […] petapixel.com »

2021-2-24 00:56

A Radioactive Lens

Between the 1940s and 1970s, a number of camera manufacturers designed lenses employing thoriated glass in one or more elements. Incorporating as much as 40% thorium dioxide (ThO2) in the glass mixture increases the index of refraction of the glass while maintaining low dispersion. petapixel.com »

2018-6-8 22:20

Humor: The 'horrifying' truth about radioactive lenses

Warning: This video contains a bit of strong language and disturbing (comical) gore. Vintage lens lover and YouTuber Mathieu Stern gets a lot of questions about radioactive lenses—will they give me cancer? are they dangerous? should I avoid buying them? These old lenses use radioactive thorium oxide, and this fact gives a lot of photographers pause when they're thinking of buying one. dpreview.com »

2017-8-1 17:43