Clarus MS-35: The Camera 1946-52 American Focal-Plane Shutter Rangefinder Kadlubek Nr. CLR0010 lens: Wollensak Velostigmat 50mm f/2.8 This has to be a Classic Manual "no pictures/pictures" post. The reason this is just on the camera itself is that -- although the shutter seems to be coming back to life with some cleaning and exercise on my copy of the Clarus--about half the time the second shutter curtain does not close all the way. When I started on it, it never really worked at any speed, but 1/1000 speed looks to be doing Ok now and the others show improvement. Before I can post any pictures taken with it, the camera will need some rehabilitation exercise and a diet of soft cleaning. So I promise that if I can get it working enough to get most of a roll accurately exposed, I'll be back with a sequel - "The Return of the Clarus MS-35: The Pictures". First, it has to be noted that there is the rather striking resemblance of this American Minnesota camera to the Candid Camera Corporation of Chicago's Perfex models from before and after World War II. If you look at the picture below showing the Perfex fifty-five and the Clarus MS-35, there's really no denying the similarities in the camera case design. Perfex was still struggling to keep in business in the immediate post-war environment, and I am skeptical that they would have licensed their body design to a company in Minneapolis, MN. A closer look reveals that much of the similarity is due to the cast aluminum (?) body with the distinctive S-curve coming from the back up to the front of the top plate. The body below on both cameras is squarish with rounded ends. A closer look reveals that the Clarus has a very different arrangement of the viewfinder and rangefinder windows, and also lacks the extinction meter window of the Perfex design. Where the Perfex lens simply screws into the body, there is a square plate for the lens mount on the Clarus. The Perfex earlier models (44 and 55) have a slow speed mechanism (which rarely works anymore) but the Clarus does not. The shutter speeds listed on the top of the Clarus are 25,50,100, 500, 1000, the same as on the Perfex fifty-five. The Clarus has a Bulb speed as well. The arrangement of the knobs and so on are slightly different on the two cameras, and the Clarus has a nicely made, ordinary hinged back, unlike the Perfex where the bottom and back come off together for loading (more like the Contax it was supposed to 'surpass'). The Perfex fifty-five has a hot shoe of sorts, while the Clarus has a flash connector immediately behind the accessory clip. Both the Clarus and the Perfex have a screw mount, but they are NOT the same diameter, although both companies used a Wollensak Velostigmat 50mm lens among others. The closest I can measure the Clarus mount is ~41.0+ to 41.17mm on the outside of the lens threads. A 40mm Praktiflex lens is too small, and a 42mm Praktica mount lens is too large, I suppose in immediate post-war USA, if it is not 41mm, the measurement could be 1- 5/8ths" (=41,27mm) ? The Clarus finishing looks a little finer than on the Perfexes I have. The turning clip for the rear cover is nicely machined, and the interior looks a little more finished than on the Perfexes.