Airvim
Pancolar in radiation protection
The Pancolar 55 f/1.4 is one of the most radioactive lenses made of thorium-based glass. Thorium itself decays by emitting only alpha particles. The lens housing already protects against them. But the daughter products of thorium decay (actinium, radium, radon, polonium...) emit both neutrons and electrons. The electrons, being inhibited in the lens body, cause additional X-ray radiation... As a result, the level of radioactivity is simply exorbitant. I decided to save my own health a little and created a protective sarcophagus around the case))) made of several layers of lead and X-ray protective rubber. To improve the appearance, I put two black aluminum cylinders with a warning sticker.
After the modification, the weight of the lens increased from 400g to 700g, the diameter increased to 79mm, and the level of radioactivity on the side of the lens dropped to 117 microrentgen. At the same time, there is a background of 6400 microrentgen from the rear lens. But there's a camera, a metal adapter, and a distance that protects me from radiation.
The front protection consists of a conventional UV filter that removes only alpha radiation.
Pancolar in radiation protection
The Pancolar 55 f/1.4 is one of the most radioactive lenses made of thorium-based glass. Thorium itself decays by emitting only alpha particles. The lens housing already protects against them. But the daughter products of thorium decay (actinium, radium, radon, polonium...) emit both neutrons and electrons. The electrons, being inhibited in the lens body, cause additional X-ray radiation... As a result, the level of radioactivity is simply exorbitant. I decided to save my own health a little and created a protective sarcophagus around the case))) made of several layers of lead and X-ray protective rubber. To improve the appearance, I put two black aluminum cylinders with a warning sticker.
After the modification, the weight of the lens increased from 400g to 700g, the diameter increased to 79mm, and the level of radioactivity on the side of the lens dropped to 117 microrentgen. At the same time, there is a background of 6400 microrentgen from the rear lens. But there's a camera, a metal adapter, and a distance that protects me from radiation.
The front protection consists of a conventional UV filter that removes only alpha radiation.