Part I: Introduction
2
Part I : Introduction
Sky-Watcher Quattro-200 ST: Sky at Night magazine group test
winner scoring 89%
The superb Skywatcher Quattro-200 ST telescope OTA has beaten all the
opposition to win best in class in the November 2011 Sky at Night
magazine.
The most acclaimed feature of the Quattro 200
astrograph is the knife-edge baffle system. The
Quattro's tube is lined with a set of nine internal baffle
rings. Their main purpose is to cut down on stray light
entering the telescope tube, greatly helping to
improve image contrast.
The Quattro is fitted with a Crayford-style focuser with
tension adjustment, focus-lock and a 10:1 dual-speed
fine focusing, and also comes with a 2-inch fitting that
has a T-thread on its external side. This allows a
sturdy connection to be made between scope and
camera with the right adaptor ring.
The primary and secondary mirrors are made of Low
Expansion Borosilicate Glass, for near zero thermal
expansion.
The impressive 0.5 mm Ultra-Thin secondary mirror
vanes ensure minimal thermal accumulation and
reaches thermal equilibrium in no time.
The secondary mirror support is mounted offset, for
perfect optical collimation.
Optimized for astrophotography, with its baffle system and parabolic primary optics with a
very fast f/4 focal ratio, the Quattro 200 is designed for exceptional wide-field, deep-space
imaging performance. Even faint galaxies and nebulas exhibit stunning detail with limited
exposure time when photographed with a CCD imager or DSLR camera.
The Quattro 200 is proposed with two options for the tube: Standard Tube (ST series) and
Carbon Fiber (CF series) for astrophotographers dealing with long to very long exposure
times. The Carbon Fiber series can remain in focus for a longer period of time and long
exposure images will stay clear and in focus.
NEVER USE YOUR TELESCOPE TO LOOK DIRECTLY AT THE
SUN. PERMANENT EYE DAMAGE WILL RESULT.
NEVER USE AN EYEPIECE-TYPE SOLAR FILTER.
NEVER USE YOUR TELESCOPE TO PROJECT SUNLIGHT ONTO
ANOTHER SURFACE; THE INTERNAL HEAT BUILD-UP WILL
DAMAGE THE TELESCOPE OPTICAL ELEMENTS.
USE A PROPER SOLAR FILTER FIRMLY MOUNTED ON THE
FRONT OF THE TELESCOPE FOR VIEWING THE SUN.
WHEN OBSERVING THE SUN, PLACE A DUST CAP OVER
YOUR FINDERSCOPE OR REMOVE IT TO PROTECT YOU
FROM ACCIDENTAL EXPOSURE.
NEVER LET A TELESCOPE POINTING THE SUN UNATTENDED.
