Difference between revisions of "Mamiya X-30"
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| − | The '''X-30''' is a camera for recording x-ray images on a fluorescent screen, made by [[Mamiya]] in the 1950s. It is a rather simple camera; there is no shutter, just a dark slide inserted in a slot in the top plate of the camera body. In practice the exposure might be controlled by the opening and closing of the x-ray source. The lens is a 6.5cm f/1.4 Roentgen-[[Zunow]], mounted in a plate to fasten into the display of the x-ray machine, and with a fine-focusing control but no iris diaphragm. | + | The '''X-30''' is a camera for recording x-ray images on a fluorescent screen, made by [[Mamiya]] in the 1950s. It is a rather simple camera; there is no shutter, just a dark slide inserted in a slot in the top plate of the camera body. In practice the exposure might be controlled by the opening and closing of the x-ray source. The lens is a 6.5cm f/1.4 Roentgen-[[Zunow]], mounted in a plate to fasten into the display of the x-ray machine, and with a fine-focusing control but no iris diaphragm. Clearly, no viewfinder is required. The camera body attaches to the back of the lens with a bayonet. Examples seen at Leitz/Westlicht sales comprise the lens, two camera bodies and ten film cassettes (branded by [[Canon]] in an early example; by Mamiya in the later one) in a wooden outfit case fitted to exactly this set.<ref name=LPA40>[https://www.leitz-auction.com/en/Mamiya-X-30-X-Ray-Camera-outfit-Roentgen-Zunow-1.4-65mm/AI-40-40209 X-30 outfit] comprising Roentgen-Zunow lens serial no.60351, two camera bodies serial nos. 6422 and 6428, and ten Canon film cassettes in a wooden case, sold at the [https://www.leitz-auction.com/en/Cameras/Past-Auctions/Auction-40/ 40th Leitz Photographica Auction], in June 2022.</ref><ref name=LPA36>[https://www.leitz-auction.com/en/Mamiya-X-30-X-Ray-Camera-outfit-Roentgen-Zunow-1.4-65mm/AI-36-38345 X-30 outfit] with Roentgen-Zunow serial no.60861, two camera bodies serial nos.581467 and 581524 (surely implying a date of 1958) and Mamiya film cassettes, in a wooden outfit case, sold at the [https://www.leitz-auction.com/en/Cameras/Past-Auctions/Auction-36/ 36th Leitz Auction], in June 2020.</ref> |
| − | The camera body has an advance knob with a chain wrapped around it, allowing it to be advanced (once) by pulling a string tied to the chain, from behind the x-ray protection screen. The dimensions of the exposed film-frame are not certain: there is a frame-counter scaled up to 50, so it could easily be a square frame. There is a simple crank for rewinding. | + | |
| + | The earlier camera body has an advance knob with a chain wrapped around it, allowing it to be advanced (once) by pulling a string tied to the chain, from behind the x-ray protection screen.<ref name=LPA40/> The later camera has a very large-diameter uptake end, which must surely house a spring-motor advance.<ref name=LPA36/> | ||
| + | The dimensions of the exposed film-frame are not certain: there is a frame-counter scaled up to 50, so it could easily be a square frame. There is a simple crank for rewinding. | ||
==Notes== | ==Notes== | ||
Revision as of 20:23, 4 March 2024
The X-30 is a camera for recording x-ray images on a fluorescent screen, made by Mamiya in the 1950s. It is a rather simple camera; there is no shutter, just a dark slide inserted in a slot in the top plate of the camera body. In practice the exposure might be controlled by the opening and closing of the x-ray source. The lens is a 6.5cm f/1.4 Roentgen-Zunow, mounted in a plate to fasten into the display of the x-ray machine, and with a fine-focusing control but no iris diaphragm. Clearly, no viewfinder is required. The camera body attaches to the back of the lens with a bayonet. Examples seen at Leitz/Westlicht sales comprise the lens, two camera bodies and ten film cassettes (branded by Canon in an early example; by Mamiya in the later one) in a wooden outfit case fitted to exactly this set.[1][2]
The earlier camera body has an advance knob with a chain wrapped around it, allowing it to be advanced (once) by pulling a string tied to the chain, from behind the x-ray protection screen.[1] The later camera has a very large-diameter uptake end, which must surely house a spring-motor advance.[2] The dimensions of the exposed film-frame are not certain: there is a frame-counter scaled up to 50, so it could easily be a square frame. There is a simple crank for rewinding.
Notes
- ↑ 1.0 1.1 X-30 outfit comprising Roentgen-Zunow lens serial no.60351, two camera bodies serial nos. 6422 and 6428, and ten Canon film cassettes in a wooden case, sold at the 40th Leitz Photographica Auction, in June 2022.
- ↑ 2.0 2.1 X-30 outfit with Roentgen-Zunow serial no.60861, two camera bodies serial nos.581467 and 581524 (surely implying a date of 1958) and Mamiya film cassettes, in a wooden outfit case, sold at the 36th Leitz Auction, in June 2020.
