2024 Thorium camera lens

Thorium camera lens

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August undefined, 2024

WebOct 11, 2012 · A Look at the Radioactivity of Old Manual Lenses. Oct 11, 2012. Michael Zhang. Radioactive Lens -- Pentax 50mm f/1.4 S-M-C Takumar. Watch on. YouTube user … WebFeb 15, 2024 · Thorium Sources. Thorium is used to make ceramics, welding rods, camera and telescope lenses, fire brick, heat resistant paint and metals used in the aerospace …

The very underestimated problem of RADIOACTIVE lenses - Cameras …

WebElement Thorium (Th), Group 20, Atomic Number 90, f-block, Mass 232.038. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, ... producing thoriated glass for use in … WebDec 29, 2016 · Thorium glass (which could contain up to 40% thorium oxide) was used the same way modern, non-radioactive ED elements are used. Some of the larger Kodak Ektar (Aero) lenses could have up to 1/2 a pound of thorium oxide in one element. I sold one to a guy in China and was worried it wouldn't get through customs because of the radioactivity. hauppauge school district ny

Which cameras have thorium (radioactive) eyepieces?: Adapted Lens …

WebThere are a significant number of lenses produced from the 1940s through the 1970s that are measurably radioactive. Main source of radioactivity is the use of thorium oxide (up to … WebJul 19, 2024 · Wide open at f/1.4 the Mamiya Sekor 55mm F/1.4 is a bit soft, even in the center, though not criminally so. Already by f/1.7 (the half-stop click between f/1.4 and f/2) the center sharpens up enormously, and while some chronic pixel-peepers might still find reasons to object, I find it already immensely usable. WebThe reason for having thorium is to improve the quality of light passing through the lens by allowing it to pass through the glass more quickly. The yellow tint inhibits the ability for … border gavaskar trophy matches

Rare Earth Glass Leica Lenses: A Quick and Quirky Overview

Radioactive lenses Camerapedia Fandom

WebMar 23, 2014 · photographer. If the camera lens contained the maximum permitted . concentration of thorium (30%), NUREG-1717 estimated that the . aforementioned annual doses could triple. Finally, FYI I want to add this link to the website of the Health . Physics Society dealing with thorium lense and how to solve the . problem of the colored reddish … WebJul 26, 2015 · Hi. I recently bought one of the radioactive Takumars (50mm f/1.4 Super) and it's clearly yellow due to the thorium content. Well, I removed the caps and covered the lens in aluminium foil (obviously not the front lens area) like some people have advised not to warm the lens too much in sunlight. border gavaskar trophy 2021 cricbuzzWeb2 days ago · RARE MINOLTA MD MC W.ROKKOR-SI 28MM F2.5 THORIUM FAST WIDE ANGLE LENS *NR MINT* Sponsored. £149.99. Free Postage 【MINT】MINOLTA MC W.ROKKOR SG 28mm F/3.5 MF Wide Angle Lens From JAPAN. £76.46 ... Nikon F Wide Angle Camera Lens, f/2.8 Wide Angle Vintage Camera Lens, Lens Adapter for Minolta … hauppauge school district calendar 22-23

"WebThorium decays by alpha emission into radium-228, which continues to decay through the thorium series into various nuclides, eventually arriving at stable lead-208. Attached to my Leica M6 film camera above is a Leica … " - Thorium camera lens

Thorium camera lens

Everything You Always Wanted To Know About Radioactive Lenses

WebOct 12, 2012 · The thorium in the lens was estimated to be 13 kBq (0.36 Ci). Using the 3–290 methodology described in Appendix A.4 for sources close to the body, the dose … WebJun 7, 2024 · A Radioactive Lens. Between the 1940s and 1970s, a number of camera manufacturers designed lenses employing thoriated glass in one or more elements. …

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WebSep 11, 2024 · Canon FD Thorium Yellow Tint. Source: Media Division. Nikolas also talks about radioactive Canon FD lenses with Thorium Dioxide in some lens elements. He comes to the conclusion that the amount of radioactivity is not dangerous for humans nor for camera sensors under normal conditions. Canon FD Thorium Heal Process. Source: … WebJan 27, 2024 · Radioactive lenses. Many lenses produced from the 1940s through the 1980s are measurably radioactive. The main source of radioactivity is the use of thorium oxide …

WebConstructed with eight elements in six groups and with radioactive thorium oxide glass, the Canon 55 mm F/1.2 lens renders excellent quality images. ... 【TOP MINT+】ASAHI SMC PENTAX M 120mm F/2.8 MF Camera Lens For K Mount Fron JAPAN (#325564227732) See all feedback. Ratings and Reviews Learn more Write a review. 4.7. 33 product ratings. 5. WebOct 8, 2024 · Of course, any lens could benefit from the addition of thorium, and after the war ended it started finding its way in to consumer products – primarily into lenses for …

http://camera-wiki.org/wiki/Radioactive_lenses WebAug 29, 2024 · Multi Format. Aug 28, 2024. #2. Thorium emits alpha radiation. In air, alpha radiation can travel about an inch or so and cannot penetrate human skin so thorium …

WebNov 7, 2024 · Nov 6, 2024. #14. reddesert said: IME, digital detectors can be sensitive to radiation events, so if someone who has a known radioactive lens and a CCD digital camera took say a 30-60 second exposure in a dark room with the lens next to the sensor, they might see an increase in hot pixels (so called "cosmic ray" hits).

WebMay 3, 2013 · A Pentax camera with a radioactive Super Takumar 50mm f/1.4 lens attached. Kodak in particular was quite prolific in using thorium glass elements. Their name shows up on the list a total of 11 ... border gavaskar trophy 2023 scorecardWebSep 5, 2024 · A total of only 550 bodies were ever made so any Leica KE-7A is a rare bird indeed. The standard KE-7A outfit included the rare 50mm f/2 Elcan (which stands for E. Leitz, Canada) lens, a unique formula consisting of 4 non-cemented, air-spaced elements designed to withstand the rigors of extreme weather and service in active combat zones. hauppauge software download windows 10WebJul 30, 2011 · This assumed that the photographer carried the camera 30 days per year and for 6 hours per day. They also estimated an exposure of 0.7 mrem per year for an average photographer. If the camera lens contained the maximum permitted concentration of thorium (30%), NUREG-1717 estimated that the aforementioned annual doses could triple. border general practiceWebApr 26, 2014 · Oh, and Thorium 232, if that's in fact what's involved, a single sheet of paper shields you from alpha particle decay, even very energetic alpha particles. Since you aren't holding the lens itself to your eye but you have a camera body and all kinds of materials and surfaces between you and either the rear or front element you're shielded. hauppauge software wintvWebMar 2, 2016 · Posted February 29, 2016. A lens called the Summitar* was produced in two batches with serial numbers from 812242 to 812323 and from 812341 to 812360. This closely resembled the first collapsible version of the Summicron. It contained slightly radioactive glass produced by Chance Brothers. border gavaskar trophy recordsWebNov 20, 2024 · Lenses That May Contain Thorium or Lanthanum Kodak Ektar 101mm f/4.5 (Miniature Crown Graphic camera) lens mfg. 1946 Kodak Ektar 38mm f/2.8 (Kodak … hauppauge teachers contractWebMar 2, 2016 · Posted February 29, 2016. A lens called the Summitar* was produced in two batches with serial numbers from 812242 to 812323 and from 812341 to 812360. This … hauppauge software alternative