HARDENED GLASS
Hardened optical glass that has 4 times the breaking strength in ANSI
standardized testing (ANSI Z80.3 : 2001) where a steel balls of varying
size and weight were dropped from a height of 50 inches onto the glass.
WATERPROOF / SCRATCH & STAIN RESISTANT MULTI-COATING Specialized
coatings that are not just water-proof to repel water spots but also
hardened to be scratch and stain resistant. Of course these coatings
are from HOYA so they are greatly reduce reflections off the surface of
the glass allowing you to capture more light in your photos.
Product Catalogue 
