G
ran
T
urismo
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User Manual
T
he Gran Turismo 71 is designed for both daytime and nighttime viewing, as an out-
standing travel scope. We recommend purchasing a WO 2” star diagonal to make the
most of these little telescopes.
Since the Gran Turismo 71 is well suited to viewing nebulae, clusters, large galaxies, and
comets, we recommend the use of high-quality wide-angle eyepieces. The WO SWAN,
XWA, and SPL series eyepieces are available in a variety of focal lengths. Viewing the
moon and planets is also impressive at magnifications of 140X when the seeing condi
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tions 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 pow
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er-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 astronom-
ical use and include precise tracking of celestial objects. Optional accessories from WO
include mounting rings and plates, super high quality 2” Quartz star diagonals which
provide for superior viewing and high-quality images.
The Gran Turismo Telescopes are suitable for large-field astrophotography; Gran Turis
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mo 71 has a great color correction at a fast speed of f5.9.
Please see our website for examples of photos taken with this telescope. The Accesso-
ries Chart on page 5 and page 10 provides additional details on photographic accesso-
ries for various CCD, digital and film cameras.
Never aim your telescope or finder scope at the Sun without proper Solar filters
installed on the front of the telescope. Doing so for even a moment may perma
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nently damage your vision. Proper Solar filters consist of filters made by reputa
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ble 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 pric-
es of proper solar filters.
Usage
