2024 Thorium lenses

Thorium lenses

Author: dbqf

August undefined, 2024

http://camera-wiki.org/wiki/Radioactive_lenses WebOct 11, 2012 · YouTube user uyt384 does tests on old camera lenses, but not in the way you'd expect. ... (S-M-C Takumar), well known for its radioactive thorium glass element near the rear of the lens.

Thorium Oxide Lenses Nikonites - Nikon User Community

WebAll Photo Lenses. Ignite your creativity with the lens that perfectly pairs with your style, camera mount, and photographic journey. Filters. Sort By. New. 17mm F4 DG DN C. $599. Learn More. Compare. WebSep 11, 2024 · The options are either professional lens modding by a company like CinMod, or trying a DIY solution with one of the kits available. Canon FD Thorium Yellow Tint. … crunchy top apple pie

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

WebOct 4, 2024 · Paris-based photographer, filmmaker and weird lens enthusiast Mathieu Stern shows us using a Super Takumar 35mm f/2! First, he tells us that these radioactive lenses … WebSimply, thorium allowed the lens manufacturer to produce high quality lenses at a reduced price. its optical properties of high refractivity and low dispersion allowed lens designers to minimize chromatic aberration and utilize lenses of lower curvature. Lanthanum was also used. Lanthanum has very weak radioactive properties, if any. 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 … built in window bird feeder

Canon LTM Lenses with thorium? - Photrio.com Photography …

How long does it take to get rid of Takumar yellowing?

WebEverything in the 24mm to 50mm should be within your price range. The 50 f/1.4 is a good starting point if you want an excellent portrait lens. The 35mm f/2.8 is also great if you want something in the more normal range. I would only recommend you stick to the nFD variants since they don't use radioactive thorium in their construction. WebOct 12, 2024 · Thorium dioxide has a 30-50% higher refractive index than typical glasses which translates into some combination of less-curved (thinner) elements or greater bending of light to produce more compact lenses of a given focal length and aperture. Kodak, Yashica, Mamiya, (and of course, Asahi), among others used thorium glass. built in windows 10 remote assistanceWeb10 CFR 40.13(c) (7) Unimportant quantities of source material. (7) Thorium or uranium contained in or on finished optical lenses and mirrors, provided that each lens or mirror does not contain more than 10 percent by weight thorium or uranium or, for lenses manufactured before August 27, 2013, 30 percent by weight of thorium; and that the exemption … built in window desk

"WebOct 1, 2024 · 💀100% WRONG. Facts about Thorium lenses. Its neither a coating NOR merely ALPHA emitter FACT: The only naturally occurring isotope of thorium is 232Th and i... " - Thorium lenses

Thorium lenses

Combined X-ray absorption and SEM–EDX spectroscopic analysis …

WebOriginal – "Some older photographic lenses were produced with glass elements containing small amounts of thorium. If stored in the dark for prolonged periods of time, these … 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. 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…

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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 … WebApr 11, 2024 · Thorium (Th) is a naturally ... These analyses were performed using the available experimental setup at the INE-Beamline using polycapillary half-lenses to achieve an X-ray beam footprint of about ...

WebThe Void Lens is an item used to summon Coznix, The Fallen Beholder in The Underworld. Failing to summon the boss does not consume the item. The sprite for this item was the winner of the Thorium Mod Discord's Spriting Contest for Week 8, made by 8953draculA. 1.6.1.0: Sprite updated. WebElement Thorium (Th), Group 20, Atomic Number 90, f-block, Mass 232.038. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. ... producing …

WebFind many great new & used options and get the best deals for Canon Fd 2/35mm Chrome Nose Thorium Glass #23406 Concave (1680983164) at the best online prices at eBay! Free shipping for many products! 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 …

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 …

WebMar 20, 2024 · Thorium is an element that can be found in small amounts in rocks and soils. It was first discovered in 1928 by Swedish chemist Jöns Jacob Berzelius, who named it after Thor, the Norse God of Thunder.Thorium dioxide is added to silica mixtures to create glass with high refraction and low wavelength dispersion, which is ideal for lenses used in … crunchy topping for apple crispWebNov 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 … built in windows 10 vpnWebFeb 15, 2024 · Thorium is a naturally occurring radioactive metal found at trace levels in soil, rocks, plants and animals. Thorium is used very little in industry, but can be found in heat … built in windows 10 backup programWebNov 7, 2024 · Don't think thorium glass was even used for consumer lenses in the late 70's (when they started making Ai lenses). I also think it was only used in the more complex high end designs - non of your lenses qualify as such. My late 60's Pentax M42 Takumar 50/1,4 does not use Thorium glass, but the earlier first version did. built in windows 10 performance utilitiesWebOct 7, 2024 · Older camera lenses: some camera lenses from the 1950s-1970s incorporated thorium into the glass, allowing for a high refractive index while maintaining a low … crunchy topping for banana breadWebJul 19, 2024 · The Mamiya-Sekor on the other hand is entirely metal, is a fast f/1.4 lens, and yet still weighs in at a mere 305g. It also looks almost diminutive in comparison. As a manual focus lens, the focusing ring is very smooth with a fairly wide throw, and the aperture ring is pleasant with palpable and audible clicks at each half-stop. built in windows 10 utilities and tool listWebEven the same lens, with the same name, produced in different factories, may have different data on resolution and other characteristics. Some Soviet lenses have received their update and are still produced on the territory of modern Russia. So, for example, the legendary Helios-40 received bayonet options and minor updates. built in windows accounts