This lens is not radioactive..
When did they stop using thorium in camera lenses?
These lenses have been employed in a variety of applications including television cameras, 35 mm cameras, military optics, microfilm readers and aerial cameras. The production of such lenses seems to have ended in the late 1980s.
Are Helios lenses good?
Across the f/16 to f/2 aperture range the Helios 44M remains remarkably consistent. The lens wide-open does exhibit a slight loss of contrast and somewhat pronounced vignetting, but when closed-down things sharpen up considerably. And it’s not just sharp for a Soviet lens, it’s sharp compared to any and all.
Are modern lenses radioactive?
Some lenses produced from the 1940s through the 1970s were treated with radioactive thorium oxide to curb chromatic aberration. But as Andrew Walker explains in this 7.5-minute video, modern digital cameras can actually “see” that radiation as image noise that has the potential ruin your long exposures.
Why was thorium used in lenses?
The usage of the naturally occurring radioactive isotope thorium-232 in older camera lenses was implemented to provide better optical properties and a cheaper production.
How is thoriated glass made?
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.
How toxic is thorium?
Thorium is radioactive and can be stored in bones. Because of these facts it has the ability to cause bone cancer many years after the exposure has taken place. Breathing in massive amounts of thorium may be lethal. People will often die of metal poisoning when massive exposure take place.
Why is thorium better than uranium?
Thorium-based reactors are safer because the reaction can easily be stopped and because the operation does not have to take place under extreme pressures. Compared to uranium reactors, thorium reactors produce far less waste and the waste that is generated is much less radioactive and much shorter-lived.
How is thorium used in everyday life? Thorium is used to make ceramics, welding rods, camera and telescope lenses, fire brick, heat resistant paint and metals used in the aerospace industry, as well as in nuclear reactions. Thorium has the potential to be used as a fuel for generating nuclear energy.
Are Canon FL lenses radioactive?
Radioactivity. Like a number of other contemporary lenses, the Canon FD 55mm ƒ/1.2 AL incorporated thoriated glass, a kind of optical glass that is doped with thorium dioxide. The inclusion of this compound makes the glass radioactive.
Which Canon lenses are radioactive?
Non-Kodak lenses reported as radioactive
- Canon FD 17mm f/4.0 SSC.
- Canon FL 50mm f/1.8.
- Canon FD 55mm f/1.2.
- Canon FL 58mm f/1.2.
- Canon FD 35mm f/2.0 (versions from the early 1970’s)
- Carl Zeiss Jenna Flektogon 35mm f/2.8.
- Ernst Leitz GmbH Wetzlar Summicron f=5cm 1:2 (collapsible, M39)
- Fuji Fujinon 50mm f/1.4.
Is Canon FD 50mm 1.8 radioactive?
Definitely not radioactive. Re: Canon FDn 50mm f1.
Are old cameras radioactive?
There are a significant number of lenses produced between 1940 and 1970 that are measurably radioactive, like the Pentax SMC Takumar 50mmf/1.4 lens Walker shows in the video above. Thorium Oxide is the main culprit of this radioactivity and was applied to glass elements because of its crystalline structure.
What are Takumar lenses?
The Takumar designation was used on lenses designed for Asahi’s 35 mm cameras, 6×7 cameras, and for other purposes too.
- Takumar lenses were made in M37 screwmount for the original Asahiflex cameras and continued into the M42 period.
- Auto-Takumar lenses were a type of preset lens.
What is a super Takumar lens? The Super Takumar is a 50mm f1. 4 lens that was released by the Asahi Optical Co. in the 1960s. It has garnered something of a legendary reputation online, and is known for its sharpness, bokeh, and propensity for flare.
Which Takumar 55mm is the best? The SMC Takumar 55mm f/1.8 delivers the best overall performance from the vintage lenses in terms of resolution and contrast and is reasonably close to the Rokinon, but the Rokinon delivers a clearly brighter image, less vignetting, as well as better contrast.
Are Pentax K mount lenses radioactive?
The good news is that there are NO Pentax-branded lenses having radioactive elements.
What is thorium dioxide used for?
Thorium Dioxide is a heavy, white, crystalline (sand-like) powder. It is used in ceramics, in nuclear fuels, as a catalyst, and in electrodes for arc welding.
Are Takumar lenses any good?
The Super-Takumar is a good looking lens with excellent build and mechanical quality. Optically it has that vintage “character” that some like but others might not. I like its decent sharpness wide open (which becomes excellent stopped down), good CA resistance, and good bokeh.
Is Helios 44 full frame?
What causes swirly bokeh?
As you extend from the middle of the frame, the introduction of the ellipse-shaped bokeh can cause a “swirling effect” in the image. Some lenses are specifically designed to produce this swirly bokeh effect, such as the Lomography Petzval 85mm f/2.2 lens (unfortunately, no longer available new).
How do you shoot with Helios 44-2?
Are vintage cameras Safe?
Vintage cameras and lenses sustain damage from two main sources: humidity and blunt force. Humidity damages camera parts that are particularly sensitive and finely calibrated. A dry, air-tight storage method prevents rust and mold from developing. Invest in good storage gear.
Does uranium glass have uranium in it? Uranium glass is glass which has had uranium, usually in oxide diuranate form, added to a glass mix before melting for colouration. The proportion usually varies from trace levels to about 2% uranium by weight, although some 20th-century pieces were made with up to 25% uranium.