Hoya HD Filters are the new PREMIUM
quality filters that are the benchmark for the photography industry.
They have 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. This means its HIGHLY
SCRATCH RESISTANT. It is also water, stain resistant and FINGER PRINT
RESISTANT.
Also, HD cir-pol filters have a factor of
1 1/6th stop loss of light – as opposed to 2 stops of standard cir-pol
filters.
This means that, not only will it take
the pressure of what you throw at your lens - but it will take what
mother nature throws at it as well!
These scratch resistant, water resistant, fingerprint resistant and
stain resistant filters are the best investment to put in front of your
lens
