▶VIDEO KIT Atik Cameras enters the world of video observing with its Atik Infinity.
The camera features the highly sensitive and extremely low-noise Sony ICX825 sensor
witha1,392-by-1,040arrayof6.45-micronpixelstoproducesmooth,high-resolutionviews
ofdeepskytargets.ThisUSB-2.0cameracanrecordupto3framespersecondatfull
resolution, which are continually stacked on your PC with the included proprietary control
software.Thecameracanalsooperatein16-bitformatandfunctionasanautoguiderfor
your deep sky imaging needs with its built-in ST-4 autoguider port. The camera comes
complete with a 3-metre USB-2.0 cable, 1.8-metre cigarette-lighter style power connector,
1¼-inch nosepiece adapter and CD with camera drivers and control software.
Atik Cameras| atik-cameras.com and dealers◀MINI APO Stellarvue has introduced the SV70T apochromatic
refractor. This compact 70-mm f/6 triplet uses an Ohara FPL53 ED
element combined with broadband coatings to achieve high-contrast
views free from colour fringing. Weighing just 2.5 kg with a pair of
hinged tube rings and a Vixen-style dovetail bar, the SV70T is a perfect
grab-and-go telescope for casual observing. Its 2½-inch dual-speed, rack-
and-pinion focuser includes both 2- and 1¼-inch eyepiece adapters, and accepts
the optional SFFR-70APO focal reducer/field flattener, converting the instrument into
an f/4.8 wide-field astrograph. See the manufacturer’s website for additional details.
Stellarvue | stellarvue.com and dealersSecond look at doubles
CambridgeDoubleStarAtlas,2ndEdition
Book Review
BruceMacEvoy&WilTirion
CambridgeUniversityPress,December2015
170 pages, ISBN 9781107534209, AU$105.00, spiral bound.FOR THOSE KEEN ON OBSERVING double stars, the
second edition of the Cambridge Double Star Atlas
(CDSA) is now out. In this new edition the 30, double-
page star charts, produced by famed uranographer Wil
Tirion, have been partly revised because of changes in
the selection of the doubles. As before, the CDSA marks
more stars on the charts as double than are described
in the data listings. The pages are a generous 23 x 30
cm in size and stars to a combined magnitude of 7.75
are shown, along with many of the brighter deep sky
objects, so it can also be used as a general purpose
atlas. All up, 2,500 doubles have more detailed data
listed than in the first edition, and with HD and
SAO catalogue numbers added for those with Go To
mounts that can use these catalogues.
Descriptions of visual appearance, except for some
colour notes, are not given, and the data lists are now
arranged by constellation. Regrettably,
dates of last measures are not given,
however there are notes on changing
binaries. The one significant downside
is that optical doubles (and those thought
likely to be) are not labelled, nor are they
included in the catalogue lists, although
hey are marked as double on the charts. So
ta Orionis and some other favourites don't
ave a data listing. In an atlas designed for
bservers I regard this as a mistake. Overall,
owever, an improved and very useful atlas.
Recommended. — Ross Gouldhttp://www.skyandtelescope.com.au 41