Sky and Telescope - July 2017 - 60
S&T Test Report by Jerry Lodriguss
The Astro-Physics 1100GTO
This powerful German equatorial mount offers many features for astrophotographers.
What We Like:
Tracking across the Meridian
Command Center software
What We Didn't Like:
Controller display difﬁcult to
read in daylight
Confusing settings in ASCOM driver
and APCC software
U.S. Price: $7,970.00 (base model)
J U L Y 2 0 1 7 * SK Y & TELESCOPE
pThe Astro-Physics 1100GTO mount on an
Astro-Physics pier with an AP 130EDFGT telescope on top. The mount weighs 54 pounds
and can carry a 100-pound payload.
cake and eat it, too? How about an
observatory-class mount that can carry
a 100-pound payload and still be portable enough to pop in your car and go
to a remote observing site?
You can't say that about many
mounts, but you can with the
1100GTO, the Astro-Physics replacement for its venerable 900GTO, which
served as one of the company's mostpopular mid-range mounts for 20 years.
The 1100GTO has some tall shoes to
ﬁll; let's ﬁnd out how it stacks up.
Designed by Robert Watters and
Roland Christen at Astro-Physics, the
precision CNC-machined 1100GTO has
managed the neat trick of keeping the
weight of the mount the same as the
900GTO while increasing the payload
by 50%. This was accomplished by
increasing the diameter of the RA and
declination shafts to 3.15 inches and
the bearings to 3.94 inches. The declination worm-wheel diameter has also
increased from 6 to 7.2 inches.
For astrophotography purposes the
1100GTO will easily bear its rated
capacity, and possibly more unless you
are using a long telescope in a howling wind. The mount, which is steady
as a rock, can also be operated from
A LL PHOTOS COURTESY THE AU THOR
HOW WOULD YOU like to have your