The Minolta X-1 is known under a few different aliases. In Europe, it was branded the XM while, in North America, it was known as the XK. The X-1 was its designation in the Japanese market.
The X-1 was introduced to the world as early as April of 1973, and was meant to be the flagship of the Minolta SLR lineup. It was one of the sturdiest and most advanced Minolta cameras of its time; meant to compete for the professional market with Canon's F-1 and Nikon's F2. Unlike these other cameras, the X-1 was lacking one big feature: no motor drive. Minolta corrected this in 1976, by releasing an updated X-1 that had a non-detachable motor drive.
Other than the motor drive, or lack of, the X-1 was full of other features. There are a whole series of finders that can be attached to the camera, including an AE finder that allows aperture priority exposure. The camera also has interchangeable focusing screens, a self-timer, depth of field preview, and even multiple exposure options. The X-1 has a wonderful titanium foil shutter curtain, making it pretty rugged. The shutter speed range on the camera is 16 seconds up to 1/2000th - not bad for a camera of its age. Additionally, it has a novel feature called the "senswitch," located where the fingers of your right hand rest when you hold the camera. This button, when depressed, turns the meter on. When you set the camera down, releasing the button, it turns the meter off and saves battery power.
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Minolta XK
"The fog vanishing under the shine of the high sun a ghost that you may have seen the lasting foundation of a house is just an overgrown concrete square that is all that is seen, and all that is graspable."
-Spencer Pond
When the Minolta XK (X1 in Japan and XM in Europe) stepped forward in 1972, it was meant to compete with the likes of Canon and Nikon. The stoic XK certainly held its own.⠀
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The XK is an obelisk of a camera and its weight insured that it would never be pushed around by the likes of a Nikon F2. Like other professional SLR cameras, the XK also boasted extensive modularity, with six prisms and, at least, 11 focusing screens from which to choose. Minolta took it a step farther by building in auto-exposure capabilities and an electronically-timed shutter, capable of up to 8 or 16 second exposures.
Perhaps the most intriguing feature on this camera is its "senswitch" - a pressure sensitive button located where the photographer's left hand rested. When the camera was picked up and the switch naturally pressed, the meter turned on. When the camera was set down and the switch released, the meter turned off.
The Achilles' heel of the XK was its lack of a detachable motor drive, an omission widely noted by professional photographers at the time of the camera's release. Minolta did not release a motor drive version of this camera until 1976, four long years later. With this new release, the drive was not detachable, creating an even heavier camera (especially once all ten AA batteries were inserted).
Today, the XK is a camera that is either loved or hated, revered or shunned. Whichever side you land on, it occupies a very interesting spot in the history of camera design.