b7c 3c2 957 33f f4d bd5 3f1 57a b29 11b 272 a8a ed4 ea0 cc5 5c4 27a e1b d65 75d fae 84e b2a 53b 434 837 bd5 83e 818 a60 d95 0f4 d49 228 6c1 dba 0c5 a4e 3b9 512 f4e f5f 831 c99 0c6 2f3 192 e92 5f6 ec2 f7c 831 901 8a9 fac 4c2 79c a65 0ef 0a5 261 e3e 543 36c d1c 65f c4e ad3 a1a ad9 d9b 883 3b3 e1b 487 83d c74 a4f b8c 650 04d fcc f16 bad 92c 43c 9a7 eee 231 bd8 f15 56b 663 0a7 eb0 171 781 08b f71 38a

While the Canadian Balsam used to cement lenses together can yellow, the yellow in Thorium Glass ("Radioactive") lenses is due to chemical changes in the chemicals in the glass itself. So you can have yellow lenses that are not at all "radioactive".10-Apr-2014

How can you tell if a lens is radioactive?

3:5919:41Radioactive Lenses Part 2. How dangerous are they to use/store …YouTubeStart of suggested clipEnd of suggested clipI'm concentrating on the rear element. Because when people have taken apart radioactive lenses they'MoreI'm concentrating on the rear element. Because when people have taken apart radioactive lenses they've often found that the rear glass elements are more radioactive than the front elements.

Why are some lenses radioactive?

Radioactivity in lanthanum containing lenses is due to the intentional inclusion of thorium in the optical glass mix. The presence of thorium can sometimes, depending on the mixture of other elements in the lens, cause moderate to severe browning of the lens elements.

WHAT IS lens yellowing?

When an originally clear lens begins to take on a yellow tint, it is generally considered to be a sign of age-related wear and tear. There are several reasons given for this change. In particular, this sort of yellowing is attributed to exposure to sunlight.

Why is my camera lens yellow?

The reason for the yellowing is its caused by the Thorium used within the glass which can turn yellow over time. What is thorium you ask? Thorium is a slightly radioactive metal that is used to help light pass through the lens more quickly. But over time it can cause the glass to turn yellow.

Do old cameras have radiation?

Radioactivity in old camera lenses is due mostly to the widespread use of thorium glass elements in the 1940s, '50s, '60s and '70s. Thorium oxide is highly refractive and low dispersion; this translated into cheaper high-quality glass by allowing manufacturers to make lenses of lesser curvature.

Are Nikkor lenses radioactive?

The Nikkor-N 35mm f/1.4 Auto has to be dismantled to get best results because of its radioactive-glass being situated deep-inside the lens.

What are radioactive lenses?

Thoriated glass is a glass material used in the manufacture of optical systems, specifically photographic lenses. It is useful to this process due to its high refractive index. Thoriated glass is radioactive due to the inclusion of thorium dioxide, oxide of radioactive element thorium.

Can yellow lenses be polarized?

Cyclists frequently choose yellow tinted lenses for the visual clarity that they provide, not just to look good! In fact, outdoor athletes of all kinds often opt for polarized sunglasses with yellow tinted lenses, as these lenses offer excellent depth perception, as they filter out blue light.

How do you remove yellow from lenses?

0:504:24How to Remove Yellow Tint from Radioactive Lens – YouTubeYouTube