Cardboard 3D - glasses (red/cyan)
For looking at specially made 3D photographs and movies that require red/cyan glasses.
These are NOT for observation of solar a eclipse.
Please see for eclipse viewing glasses here: Solar Specs
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Achromatic Lens, f=124 mm, D=31mm
Achromatic Lens, f=135.5 mm, D=30mm
Achromatic Lens, f=147 mm, D=50mm
Achromatic Lens, f=147.3 mm, D=35mm
