DayStar Filters Magnesium Quark Eyepiece Podręcznik użytkownika - Strona 6

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Eyepiece Selection:

Daystar Recommends Tele Vue Piossl series

eyepieces of 25mm, 32mm, and 40mm

Remember that at F/30, a high powered eyepiece

can exceed Dawes' lim it. 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 Piossl 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 Piossl 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

in superior design

Furthermore, the adjustable eye cup offers additional

contrast by allowing the user to dark adapt during sunny

days.

Eyepiece features we found to increase performance

include:

- "Fully Multicoated" - Of those eyepieces which did better than

others,

those marked "fully multicoated" offered better views from less internal

scattering

- Blackened optical edges - Tele Vue and other eyepieces which

performed better all had blackened edges of their optical elements

This

also reduces internal scattering within the

eyepiece.

Maximizing the viewing experience:

Daytime viewing results in stray light entering your eye that can make it

hard to see through the filter. We recommend a viewing hood or cloth be

placed over your head to limit the stray light that enters your

eye,

allowing fainter prominences and more surface detail to be observed

comfortable chair also improves the experience, allowing the eye to stay

steady for longer periods so as to pick out more subtle details on the

surface of the Sun