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GP-503.1 PIN HOLE CAMERA Two rectangular open-ended light-proof wood boxes. One sides into the other and contains a frosted translucent glass plate upon which image is formed. Other box has pinhole opening at closed end. Size15x10x10Cm (Lx Wx H) approx.  GP-503.2 PIN HOLE CAMERA KIT The kit consists of the following items : 8 Card board boxes150x100x100mm with hole, screen and lid. 50 Sheets of black paper 200x250mm. 1 200W lamp 1 Mounted lamp holder with flex. 1 Packet of pins.  GP-505.1 TELESCOPE/MICROSCOPE MOUNT Light alloy L section mount, 800 x 20mm, ungraduated central support rod 200x12mm, Length x diameter, at right angles to axis of telescope. Complete with one 50mm and two 25mm diameter aperture matt black lens holders fitted with lens retaining clips and knurled locking screws.  GP-505.2 TELESCOPE MODEL ASTRONOMICAL Comprising a convex lens 38mm diameter x 150mm focal length, mounted in a plastic tube 400 x 50mm diameter, and a double convex lens 50mm diameter 500mm focal length mounted on a tube 400 x 55mm diameter. The small tube is located in the large tube by means of foam plastic rings which provide an effective sliding light seal.  GP-505.3 TELESCOPE MODEL TERRESTRIAL Specification as GP-505.2 but with Plano-concave eye-piece lens to provided erect image. Page : 1 | 2 |