Asahi Pentax 6x7 MLU Spiegelreflexkamera (SLR)
Nr. 82428221
Fernglas - Bob Optik BOB Optik 8-20x50 Zoom-Telephoto-Monokular
Nr. 82428221
Fernglas - Bob Optik BOB Optik 8-20x50 Zoom-Telephoto-Monokular
The "BOB Optik Zoom-Telephoto-Monokular" resembles the Horizon 8-20x45, but has 50mm objective. The monocular was made in Japan (s. label by Jap. Telescope Inspection institute) and has code JB-46 imprinted which stands for "Otsuka Kogaku Co. Ltd., Tokyo". Further markings on the top cover are the model type "T-820", the wide angle field of view of "61m/1000m bei 20x" and "No. 1109". This porro-1-glass has a Bausch & Lomb body with a cast-in tripod thread. The lenses are coated green. All adjustment rings are silvery aluminium with some rubber ring for a firm grip. The objective focusing is labeled with distance numbers in meter (white numbers) and feet (red numbers). They range from 6m to infinity (20 ft. to infinity). The adjustment ring near to the housing works as the power adjustment continously zooming from 8 to 20 times. The other adjustment ring fucntions as a counter screw when using the monocular as a telephoto-lens with a camera. There is a 49mm adpter ring screwed on the 46mm thread of the ocular. Also a rtthreaded rubber eyecup ring is screwed on. The "BOB 8-20x" is 185 to 193mm tall. The housing measures 78x59mm at its top. The objective tube starts at a 55mm diameter and ends at 67mm. The ocular adjustment rings are 48mm, the eyecup 40mm in dieamter. The monocular weighs 572g.
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