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Dream
Astrograph - 16" |
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The animation at left shows the optional shrouds for
the 16" f3.75 Dream Astrograph |
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Because of the 3" diameter of the coma corrector
on the Dream Astrographs, we highly recommend the top shroud. |
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The shrouds can be machine washed and are made from
rugged material that can withstand nightly use in harsh environments. |
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Custom shapes, like the tapered lower section on the
16" Dream Astrograph shroud and custom openings (focuser
or guidescope) can also be designed in. |
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Note the opening around the focuser. It allows cables
to be run below the shroud but outside the light path. |
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Keeping cabling near the structure and away from a
hanging position is the most consistent for your tracking system.
Random tracking errors from cable flop is greatly reduced or
eliminated. |
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This type of elastic opening also keeps out any stray
light at a very vulnerable location, directly above the large
secondary mirror. |
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If a lower shroud is desired, we highly recommend
leaving an open space to allow air flow to vent the primary mirror. |
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This arrangement will lesson thermal currents while
the optic is equalizing. |
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Moving air will also help reduce dew formation. |
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Additional
OTA photos. |
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