Acetanilide crystals in polarized light

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Acetanilide in polarizing light
Object: Acetanilide
Date 30.12. 2017
Focal lenght, speed: -
Camera: Canon EOS 40D, microscope
Sensor: 10.0 MPix APS-C, 22.2 x 14.8 mm, pixel 5.7 um
Lens: apochromatic objective
Exposure: 1/25 sec, ISO 100
Filter: crosed polarizers and waveplate