Quantitative colour test based on Farnsworth D-15.
The diameter of the stimulus is 3.3 cm and can be reduced by use of restriction rings to of 1.2 cm.
Travel tube comes with black cloth.
Good-Lite: 260260
Quantitative colour test based on Farnsworth D-15.
The diameter of the stimulus is 3.3 cm and can be reduced by use of restriction rings to of 1.2 cm.
Travel tube comes with black cloth.
Good-Lite: 260260