Scope Covers
One of the worst on-going problems with high-grade optics is the
accumulation of dust, oils, vapor drops and
scratches on the eyepiece and
objective lenses. The thin metallic coatings, which are put ther to increase
resolution and other properties - by color/wave, separation-are literally
worn and/or scratched off by cleaning the
lenses over time. The result
is optical quality so bad that sometimes it is even difficult to see through
the scope.
One might as well be using iorn sights or a cheap, poor quality
scope.
Our lens cover glass is optical lens glass: ground and polished
to "0" flatness! That is flat - distortion free flatness! We
then broad
band coat the lenses and put a topcoat of Magnesium Fluoride for hardness
over that. The result is very little
loss in fine optical properties -
but there is a little loss. When you need absolute maximum resolution
you should remove
the glass covers.
What do you want; a scratched, hard to see through scope or a very, very
slight loss of resolution?
The answer is obvious.