William Optics Zenithtar 80 FD - Manual (Page 6)

Connection Instructions
( Aligning R.D.F. )
Step-2
Use a 2mm Allen key to loosen
the setscrew on the left side
of the RDF, near the bracket
under the letter "R". Using a
2.5 mm Allen key make
adjustments to the Alt-Az
adjustments (marked R and
UP) until the red dot in the
reticule overlays the same
object as the center of the
eyepiece view.
Step-3
Using a high magnification
eyepiece (short focal length)
repeat this procedure for fine
alignment.
Step-1
Find a distant object in the
telescope with a low power
eyepiece.
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Crafting the Earth's Finest
Astronmical Instruments
Usage
The Zenithstar FD series is designed as the ultimate, versatile short tube refractor. It is
perfect for travel, piggybacking/guiding scope, astrophotography, rich-field observations.
We recommend purchasing a WO 2" star diagonal to make the most of this telescope.
Because the Zenithstar FD is well suited to viewing nebulae, clusters, large galaxies and
comets, we recommend the use of high quality wide-angle eyepieces. The WO UWAN
series eyepieces are available in a variety of focal lengths and make a perfect complement
to this telescope.
Viewing the moon and planets is also very 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.
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 black anodized mounting rings and plates, super high quality 2" Quartz star
diagonals which provide for superior viewing and high quality images.
A recommended Alt-az. mount for this telescope is William Optics high-quality mount,
EazyTouch. This beautiful mount is easy to use and will provide a perfect, quick-to-set-
up addition to your collection.
The ZSFD is suitable for large-field astrophotography; the accessories Chart on page 03
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.
The alignment of the finder needs to be performed only when necessary. We
recommend aligning during daytime by point telescope and finder at the same
far object.
View Field of Telescope.
(with WO Dielectric)
Alignment Setcrews
View Field of Red Dot Finder.
(with WO Erecting Illuminated
Red Dot Finder)
Reticule Selector
Brightness Adjustment