Lubitel 166 B

Twin lens reflex medium format camera, two objective lenses of the same focal length. One of the lenses is the photographic objective and the other is used for viewfinder system. The two objectives are connected, so that the focus shown on the focusing screen will be exactly the same as on the film. Uses 120 roll film with square 6x6 images. Shutter speeds from 1/250 to 1/15 and a bulb setting, aperture from f/4.5 to f/22, and focuses close at just over a meter

Film accepted	120 - 61.5 mm
Picture size	6 * 6 and 4.5 * 6 cm
Picture number	12 or 16
Photographic lens - coated three-element anastigmat T-22
Focal length	7.5 cm
Relative aperture	f/4.5
Viewfinder lens relative aperture	f/2.8
Automatic shutter speeds, s	1/250, 1/125, 1/60, 1/30, 1/15
With shutter speed set to B any manual-control shutter speeds are obtainable
Diaphragm scale	from 4.5 to 22
Distance scale, m	from 1.3 to infinity
Self-timer operation time, s	7-15
Thread dimensions for the light filter mount	40.5 * 0.6 mm