US$ 183.50
Larger-aperture 75mm lens at a 15cm focal length captures more of a specimen at a glance
Copper plate with 4mm socket terminals for the simple-cell apparatus
46mm copper wire on a 9mm soft-iron U-form core
Barlow's Wheel apparatus with neodymium magnets and a heavy base
88-inch face reading 0-2
Concave Glass Mirror, 75mm Diameter, 300mm Focal Length Item Type_Density Cubes & Cylinders Larger-aperture 75mm lens at aConcave glass mirror, 75mm diameter and 300mm focal length, ~3mm thick, the f 4 curvature stretching the focal throw for projection style image formation and reflector telescope analogues.
US$ 183.50
US$ 99.00
US$ 621.00