Concave Glass Mirror, 75mm Diameter, 300mm Focal Length Item Type_Density Cubes & Cylinders Larger-aperture 75mm lens at a

Larger-aperture 75mm lens at a 15cm focal length captures more of a specimen at a glance

Emission Control Module - Item # AT-5102

75-inch analog-to-digital converter samples and quantizes a continuous input into a binary digital output for student visualization

Copper plate with 4mm socket terminals for the simple-cell apparatus

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.