Sky and Telescope - March 2016 - 67

take longer exposures than a standard
video camera. Even the most basic model
astrovideo camera (for example, the
Astro-Video DSO-1) can record exposures
of several seconds, which can reveal thousands of targets in a small scope. Many
also include the ability to integrate several
exposures together in order to show even
fainter targets, while simultaneously
reducing noise in the signal.
Most of these astrovideo cameras
are built around one of several highsensitivity Sony CCD detectors in either
1/3 - or ½-inch format, with a typical
pixel array of 640 × 480 pixels, roughly
equivalent to the standard resolution of
analog television sets. These are significantly smaller than the CCDs used in
conventional astrophotography because
they are designed to display an image on
a TV screen rather than produce highresolution images.
All astrovideo cameras allow you to
control basic functions like exposure,
gain, and gamma. Some come bundled
with everything necessary to get you
up and running right out of the box,
including video and power cables and the
C-mount adapter needed to connect the
camera to your telescope.
Some camera models include an
S-video output in addition to the composite video output. S-Video provides better
image quality over short distances, and it
can be used to send the signal to a second
monitor, which is especially useful when
using your system to share the view with
an audience. Another helpful option is
a remote control that gives access to the
camera's control menu; this is much
better than having to manipulate the
small buttons on the back of the camera,
particularly in the dark.

Essential Equipment

S&T: SEAN WALKER

Besides the camera and your telescope,
you'll need only a few other important
accessories to get started. Most models
include a standard 1¼-inch nosepiece,
LIVE VIEWING Video-assisted observing has
become a popular way to enjoy the night sky.
Detailed views of galaxies, nebulae, and star
clusters are within reach of small telescopes
when paired with these affordable devices.

Sk yandTelescope.com March 2016

67



http://www.SkyandTelescope.com

Sky and Telescope - March 2016

Table of Contents for the Digital Edition of Sky and Telescope - March 2016

Contents
Sky and Telescope - March 2016 - Cover1
Sky and Telescope - March 2016 - Cover2
Sky and Telescope - March 2016 - 1
Sky and Telescope - March 2016 - Contents
Sky and Telescope - March 2016 - 3
Sky and Telescope - March 2016 - A
Sky and Telescope - March 2016 - B
Sky and Telescope - March 2016 - 4
Sky and Telescope - March 2016 - 5
Sky and Telescope - March 2016 - 6
Sky and Telescope - March 2016 - 7
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Sky and Telescope - March 2016 - Cover3
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