Mamiya 7 Ii Lens Professional On The
Designed and engineered for easy. The Mamiya 7 II is the perfect 6×7 format camera for the professional on the go, eliminating the heavy mirror box of SLR cameras, so it can go along anywhere, any time you need it. Compact design wighs only 1,210g with the 80mm standard lens. A 6×7 format camera to go anywhere your camera work takes you.
Mamiya Sekor 58mm f1.7 – M42 mountangle lens, an ultra-wide 43mm lens and a 150mm telephoto lens. This camera used an Exakta mount therefore, the first version of the Sekor 58mm f1.7 can easily be adapted to modern cameras using the widely available Exakta adapters. Mamiya Sekor 58mm f1.7 F.C., released in 1961, alongside the Mamiya’s first production SLR camera – the Mamiya Prismat NP. These cameras can take on virtually any assignment from fashion and beauty to travel and nature, from sports and photojournalism to architecture and advertising illustration, with superior results and.
Mamiya Sekor 58mm f1.7 M42 Lens radioactivityMamiya Sekor 58mm f1.7 M42 is mildly radioactive – indicating that lens includes thorium-containing glass. This camera had a unique mount, not used on any other camera system, therefore adapting is difficult without lens modification. Argus-Sekor 58mm f1.7The third version is in the form of Argus-Sekor 58mm f1.7, which Mamiya made for Argus between 1962-1966. M42 version is also the rarest because Mamiya only made it for two years. It came with the M42 version of the Mamiya Sekor 58mm f1.7, containing radioactive lens elements – meaning a change in the optical design had occurred between the first and second versions.
This placement of the radioactive component makes it safer for both the user and the camera because the radiation level at the rear of the lens is barely noticeable above the background level. Radioactivity is mild, and very ‘favourably’ placed – radiating mainly from the front of the lens towards the subject, and not from the rear element towards the user. Geiger counter registering 1.19 uSv/h for front of Mamiya Sekor 58mm f1.7 M42 Is it dangerous?It is relatively safe.
Take care not to drop or shatter this lens inside your home, as it will contaminate it.Oak Ridge Associated Universities as an excellent post about lens radioactivity. ” – nrc.gov NUREG-1717 –288These general precautions are mandatory when handling any radioactive material — especially alpha-emitting thoriated glass which is far more damaging inside the body than outside of it. This concern is because of the proximity of the glass to the eye and lack of sufficient absorbing material between the source and tissues of the eye. However, in unauthorized uses of thoriated optical glass, such as eyepieces of optical instruments, exposure to the eye to alpha and beta particles also would be of concern. Doses required to inflict this damage are much larger than the radioactive lens can give however, I do not want to risk developing hot pixels and therefore take my radioactive lenses off the camera after use.Increased radiation exposure can cause cataracts in the eyes, therefore do not expose your eyes unnecessarily – keep your distance when cleaning and inspecting radioactive lenses.“ For uses of thoriated optical glass that are authorized under this exemption, the lens would be enclosed by other materials or there would be additional material between the lens and the tissues of an exposed individual, and only photon exposures would be of concern. Radiation damage results in the formation of hot pixels on the sensor.
Try to look on eBay USA, and eBay UK – primary markets of the Mamiya Prismat cameras. It will depend on the condition of the lens and its location. They are very sturdy and built like a tank.Front view Side view The rear view showing the 10 aperture blades PriceThese lenses are uncommon, and prices can vary dramatically from £50 to £300.
The performance does justify the price, and the rarity consequently makes it a good investment. Closeup shots using extension tubes are vivid and detailed, with silky backgrounds.I rate this lens 5 out of 5. The tones of the black and white photos are pleasing, showing good micro-contrast. ConclusionMamiya Sekor 58mm f1.7 is a competent lens for its age – images are contrasty and sharp. You will likely have to search for some time to get this lens.
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