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--"The only thing that gave me NO worries or headaches
was the Dream
Astrograph. This light
bucket worked perfectly the very first time. Collimation was,
after shipment to Belgium and transporting it more than 1000
km by car, almost perfect!! Also focus could stay at the same
position for the whole night, very comfortably!! This scope is
giving me more than I ever could expect from a telescope and
I'm very confident that the collimation will be very stable for
a long time, which is a necessity for imaging remotely! Stars
are perfectly round all over the field and in combination with
the corrector and the ML16803 there is almost no vignetting,
WHAT A REVELATION!!!!
--Shane, a special thanks to you for creating this innovative
product for me. I now understand that perfectionism and short
delivery date cannot go together!"
- this Dream Astrograph customer |
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Test
out of another 16" f3.75 Dream Astrograph - Filter Air System
Technology (FAST) |
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All images taken during test out here
at Dream were done without adjusting focus, showing off the athermal
power of Dream's engineered optical systems. These full-frame,
unprocessed images were acquired over four different nights spread
out over one week. The temperature variation over test nights
was 20°F. |
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Collimation of this and all Dream Astrograph & Hypergraph
optical systems is achieved during the day & only once, due
to the extremely high stiffness and athermal nature of Dream's
complimentary products. The custom tools & kit ship with
each system. |
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The CCD used is a KAI-11002 chip: 9µm
pixels, 4008 x 2672 (42mm diagonal). |
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Dream's high performance, consistent advanced
composite parts & engineering
lightweight mirrors are engineered and produced in house,
giving Dream control & optimization that cannot be achieved
by using outside vendors. |
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"Achieving superb performance is a goal, but achieving that
same high level of performance as the instrument changes angle
and as temperature changes, is the signature of a Dream optical
system." leighShane Santi - Dream Founder &
President |
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2124:
zenith, OTA on east side of mount. |
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2127:
North field, near meridian, M108 field. |
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2129:
M81/82 field, NW. |
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2130: meridian flip. Arturus field, SW. |
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2132: Spica field, low SSE. |
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2136:
Caldwell 26 galaxy, close to zenith. OTA on other side compared
to 2124. |
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2137: M13 field, low ENE. |
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2138: NNE field. |
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2139:
meridian flip. M105 field in SW |
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The FITS files below illustrate all-sky
performance after adding 5 and then 10 additional pounds to the
back of the camera. |
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Above image shows 10 pounds
added to the camera; testing stiffness of the CFSC™ focuser
platform & focuser. |
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5 pounds
added to back of camera: |
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2150:
zenith. |
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2153:
meridian flip. Spica field, SSW. |
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2156:
meridian flip, M13 field, ENE. |
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2158:
zenith, but OTA now opposite side. |
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2161:
NNE, fairly low. |
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2166:
meridian flip, fairly due west. |
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2170:
M66 field, SSE. |
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2173:
meridian flip. M81/82 field, NNE. |
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2174:
meridian flip. Zenith again (start). |
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10 pounds
added to back of camera: |
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2178:
zenith, same position as 2174. |
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2181:
almost due west, fairly low. |
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2188:
meridian flip. M61, SSE. |
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2190:
North, along meridian. |
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2191:
meridian flip. M92, NE field. |
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2194:
North field. M81/82. |
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2196:
meridian flip, Vega star field, ENE. |
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2145:
control image. Same night. No mass added. |
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