DayStar Filters Combo Quark Hydrogen Alpha Eyepiece 매뉴얼 - 페이지 6
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Do not touch the internal, optical elements of the filter assembly. While
the exterior glass surface coatings are durable, they are easily
scratched. A few specks of dust will have no effect on the quality of the
image, and may be gently blown off with a squeeze bulb. Do NOT use
compressed air cans to blow dust off any optical surfaces. Small
amounts of residual 'film' will not affect visual performance. Fingerprints,
smudges and smears must be cleaned off. Preferred cleaning method is
to return the Quark to the DayStar Filters laboratory for proper factory
cleaning.
Do not unscrew, open or separate your Quark filter assembly. The optical
elements are held under pressure by design and will become damaged if
opened. Opening the optical filter assembly will void your warranty. The
safest cleaning method is to moisten a very soft, lint-free tissue, cloth or
"Qtip" with a pure acetone, methanol, or Isopropyl Alcohol (reagent
grade) and gently whisk away the stain. Do not apply solutions directly to
the glass surface. Stroke from the center of the aperture outward only.
After each cleaning stroke, use a fresh applicator. The fewer strokes, the
better! The metal housing and other non optical parts are anodized
surfaces and can be cleaned with Windex.
Eyepiece Selection:
Daystar Recommends Tele Vue Plossl series
eyepieces of 25mm, 32mm, and 40mm.
Remember that at F/14-30, a high powered
eyepiece can exceed Dawes' limit. Observers will
find best results with an eyepiece which is 32mm or
greater to avoid this. Eyepieces of higher power will
result in a fuzzy disk without the ability to focus well.
We have tested a number of eyepieces over the years. We performed a
comprehensive eyepiece comparison between various brand names and
eyepiece styles.
Naglers, zooms, radians and other "fast" eyepieces
typically perform very badly on DayStar applications.
Other brands do offer Plossl eyepieces in 32-40mm and they can give a
respectable performance in lieu of a Tele Vue. We have also found
some of the very old wide field "Erfle" eyepieces aren't bad for an
experienced observer.
It should be noted that repeatedly in side-by-
side tests, we found Tele Vue brand Plossl eyepieces to offer the highest
contrast, most even view and widest exit pupil. In Solar Observing,
contrast is achieved by control of scattering. Tele Vue Plossls stand out