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INDUSTRYNEWS
HUBBLE OPTICS
Designing Newtonian Astrographs
As the final pages of this issue of
ATT were being completed, Hubble
Optics' Tong Liu shared that he is now in
the design/prototyping phase of two new
lines of fast Newtonian Astrographs in
apertures from 12.5 inches to 20 inches,
starting with a NA12.5 f/3.4 corrected
specifically for mating with Tele Vue's
Paracorr Type 2 coma corrector, yielding
an image circle of 31 mm, wide enough to
accommodate APS-C sized CCD sensors.
A more advanced Hyperbolic
Newtonain Astrograph (HNA) 12.5
f/3.4 is also being designed and will be
equipped with Hubble Optics' own
HNA corrector to produce a well-corrected
>44-mm diameter image circle to
provide excellent coverage for full-frame
35-mm CCD sensors.
Fully loaded, the NA12.5 should be
mounted on an EQ mount with a payload
capacity of at least 16 kilogram (35
pounds), while the HNA 12.5 with 3-
inch corrector/focuser can be mounted
on a 18-kilogram (40-pound) loadcapacity
EQ mount. For users demanding
even larger fields of view for exceptionally-large
CCD sensors, an
HNA12.5 with 3.5-inch corrector will
also be available, producing a well-corrected
50-mm image circle.
The NA line will be equipped with a
parabolic sandwich primary mirror, while
the HNA line will equipped with a hyperbolic
sandwich primary mirror. All OTAs
will be optimized with double-stage carbon-fiber/aluminum
truss tubes to achieve
near-zero temperature focal shifting for the
most demanding CCD imaging.
Hubble Optics currently projects
initial availability of both the new NA
and HNA OTAs during summer 2013.
The NA12.5 will be competitively priced
at about $3000US, while the HNA12.5
will be priced about $4000US.
Follow www.hubbleoptics.com for
further information as it develops.
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Astronomy TECHNOLOGY TODAY 21