Thorium camera lens

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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 … WebManufacturing materials, when aged can lead to a yellowing of camera lens glass in addition to or alternatively radioactive elements in the production. ... MC Rokkor series and many of the Canon FD lenses and the Bausch and Lomb Super Baltars, of which some versions contain Thorium Oxide. As some of these lenses are highly sought after, ...

RARE MINOLTA MD MC W.ROKKOR-SI 28MM F2.5 THORIUM FAST WIDE ANGLE LENS …

WebSep 2, 2013 · Many camera lens had radioactive Thorium-232 coatings until mid 1970s. If coating turns brown/yellow tint its easily cleared up with ultraviolet light. Above video radiation test shows 25,000 CPM while normal background radiation is 20 CPM. That can't be good for you. Makes you wonder how radiation didn't expose the film. Webi scored this lovely old camera at a flea market. the lens partly consists of the radioactive element thorium.by adding thorium to the lens glass, a high ref... joey garlic\u0027s menu manchester ct

large radioactive camera lens (thorium 232) - YouTube

WebJul 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. 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. 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). joey gatto baseball

Thoriated Camera Lens (ca. 1970s) - Museum of Radiation and Radioac…

Radioactive Lenses and Everything About Them - Lens …

WebAug 1, 2024 · The results are comically extreme: Once he's done messing with us, Stern dives into the numbers to explain why radioactive lenses are actually nothing to worry … WebMar 23, 2011 · Thoriated Camera Lens (ca. 1970s) List of Takumar Lenses That Turn Yellow Introduction of Thorium Oxide into Super Takumar Lenses::Manual Focus Lenses Again, I can confirm from sales literature that the 55mm f/2.0 Super and SMC had "rare earth" elements and so are on this list. integrity urgent care wichita falls txThoriated 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. It has therefore been succeeded as a material of choice by glass including lanthanum oxide. Thoriated glass can contain up to 30% by weight of thorium. The thoriated glass elements in lenses over ti… integrity used cars bucyrus ohio

"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. " - Thorium camera lens

Thorium camera lens

WebSimply, thorium allowed the lens manufacturer to produce high quality lenses at a reduced price. ... (Miniature Crown Graphic camera) lens mfg. 1946. Kodak Ektar 38mm f/2.8 (Kodak Instamatic 814 camera) lens mfg 1968-1970. Kodak … 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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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 … 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 …

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. 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.

http://camera-wiki.org/wiki/Radioactive_lenses WebMar 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.

WebMar 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 …

WebFind many great new & used options and get the best deals for RARE MINOLTA MD MC W.ROKKOR-SI 28MM F2.5 THORIUM FAST WIDE ANGLE LENS *NR MINT* at the best online prices at eBay! Free delivery for many products ... Minolta MD Minolta MD Wide Angle Camera Lenses, Lens Adapter for Minolta MD/MC/SR, Minolta MD Camera Wide Angle … integrity usdaWebJul 28, 2024 · The tight construction and perfect ergonomics feel more natural than the chunkier Canon and somewhat flimsy Olympus offerings. And interestingly enough, unlike Canon FD lenses the M42 mount Super Takumars are also EOS-friendly. And et’s not forget the value proposition. These 50mm Super-Takumars are cheap. integrity utility services incWebFeb 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 … joey garlic west hartford menuWebMay 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 ... integrity utility trailerWebJan 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 … integrity used cars wasillaWebSep 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: … joey garlic\u0027s newington ct menuWeb2 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 … integrity used car sales