What camera did Ed White use during the first space walk?

history was made when the first picture of a spacecraft in orbit was taken by astronaut Ed White as he floated outside his spacecraft. He used a Zeiss Contarex 35mm camera mounted atop his gas-powered maneuvering gun.

From http://history.nasa.gov/printFriendly/apollo_photo.html

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^{Image: NASA "The first photograph of the EVA as Ed White backs away from the Gemini spacecraft over the Pacific Ocean northeast of Hawaii"}

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^{Image: NASA "This photograph was taken early in the EVA over a cloud-covered Pacific Ocean. The maneuvering gun is visible in White's right hand."}

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^{Image: NASA, public domain "Hand-Held Self-Maneuvering Unit to be used during extravehicular activity (EVA) on Gemini 4 flight. It is an integral unit that contains its own high pressure metering valves and nozzles required to produce controlled thrust. A camera is mounted on the front of the unit."}

I believe special versions of cameras were sometimes produced for use in space. for example to make them easier to use in a spacesuit (a film advance lever might be replaced by a knurled knob, the camera might be painted black and so on). This might explain why the camera used by Ed White in space looks slightly different to the cameras used by the general public on Earth.