The Cooke Telepanchro 4/317mm lens is purposed for usual film shots.

Specification of Cooke Telepanchro 4/317mm  

Manufacturer   "Rank, Taylor & Hobson" (England)
Lens system   -
Focal length f' 318.1 mm
Angle of view 2ω' 4°55'
Effective relative aperture f:nэ 1:4.2
Lens length Σd 156 mm
Front focal length S -483.8 mm
Back focal length S' 103.2 mm
Flange focal distance Z 52.1 mm
Block length B 228 mm
Block max. diameter D 108 mm
Rear diameter D' 41 mm
Front element diameter d1 79.5 mm
Rear element diameter d2 33.4 mm
Mount thread   -
Distance from rear end of the housing
to the focal plane
l 33 mm
Aperture blades quantity   ?
Frame size   16x22 mm
Weight   2.4 kg






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