View Field of Telescope with WO Erecting Finderscope
(Note: The image will be reversed left to right if a standard star Diagonal is used)
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www.william-optics.com
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Step-1
Find a distant object in the
telescope with a low power
eyepiece.
Crafting the Earth's Finest
Astronmical Instruments
Align the finderscope pointing at the same object as the telescope.
Step-2
Align the finderscope by
pointing at the same object,
then loosen or tighten the
alignment screws.
Step-3
Use a high power eyepiece
and repeat this procedure.
View Field of Telescope.
(with WO Erecting Prism)
View Field of Finderscope.
(with WO Erecting Illuminated
Finderscope)
Alignment Screws.
Usage
The Zenithstar 80 is designed to work with both 1 1/4 inch and 2 inch diameter eyepieces
in various focal lengths, for both daytime and nighttime viewing. Because the Zenithstar
80 is well suited to viewing nebulae, clusters, large galaxies and comets, we recommend
the use of high quality wide angle eyepieces. The WO SWAN and UWAN series eyepieces
are available in a variety of focal lengths. Viewing the moon and planets is also
impressive at magnifications of 120X when seeing conditions permit.
To calculate the magnification of your telescope and eyepiece combination, divide the
telescope focal length in mm by the eyepiece focal length in mm. For example, a 4mm
eyepiece in Zenithstar 80 will display an image of 120X. (480mm / 4mm = 120). The
suggested maximum magnification for the Zenithstar 80 is 120X.
Keep in mind that the atmosphere plays an important role in seeing conditions, and only
the best seeing conditions will support high power viewing. Additional power under
less than ideal seeing conditions will not result in an increase in viewable details, and
lower powered eyepieces should there be used under those conditions. It's easiest to
locate objects using low power eyepieces (20X magnification) and then zoom in by
switching to higher powered eyepieces. The largest field of view will be seen using a
12X low power-wide field of view eyepiece.
A stable tripod or mount is recommended for optimal viewing. This includes high quality
photography tripods, and German Equatorial mounts, which are designed for astronomical
use and include precise tracking of celestial objects. Optional accessories from WO
include mounting rings and plates, super high quality 2" Quartz star diagonals, and 2"
Erecting Prisms, all of which provide for superior viewing and high quality images.
The Zenithstar telescope has not been specifically designed for astrophotography;
however it is able to produce very good results when used with the proper equipment.
Please see our website for examples of photos taken with these telescopes. The
Accessories Chart on page 13 provides additional details on photographic accessories
for various CCD, digital and film cameras.
Never aim your telescope or finderscope at the Sun without proper Solar filters installed
on the front of the telescope. Doing so for even a moment may permanently damage
your vision. Proper Solar filters consist of a filters made by reputable manufacturers,
designed to fit tightly over the front of the dew shield. Solar eyepiece filters are not
considered safe, and should not be used. With proper front mounted Solar filters, the
telescope will not be harmed by viewing the Sun. Contact your Authorized WO Dealer
for further information on the brands, sizes, and prices of proper solar filters.
Connection Instructions
( Aligning Finderscope )
