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MINERAL PHOTOGREY AND PHOTOBROWN LENSRefraction index: 1.523 & 1.503
Blank: Corning blank(1.523) and China blank is available.
Color: Grey and brown
Abbe value: 58 & 64
Can be used equally well throughout the year, in and out, in all climates and different activities
High original transmittance, high rate of darkening in the sun.
AR Multicoating in Green color is available.
Corning Photogrey Extra(#8111) and Corning Photobrown Extra(#8122) is available.
Power range: Sphere: 0.00 to 10.00, Cylinder: 0.00 to 4.00
