Sky & Telescope - January 2019 - 73

and centering the mirrors with unaided
eyes looking through the focuser."
Also, the two mirrors re-reverse the
image inversion common to refractors,
so the image is correctly oriented.
Additionally, the center of gravity
is near the middle of the wooden box
that houses the objective, focuser, and
tertiary mirror, so the eyepiece remains
at nearly the same height regardless of
where the telescope is pointed.
You might wonder, as I did, why Bertrand chose to put his tertiary mirror
across the box from the focuser rather
than right next to it (and thereby allowing for a smaller tertiary). Bertrand
explains: "First, putting a small tertiary
mirror next to the focuser would have
led to a 100-mm increase of the overall
length of the refractor. And second, I
already owned a very good 66-mm diagonal and did not want to buy another
one." Excellent reasons, both!
To cut down on stray light decreasing
image contrast, Bertrand uses a shroud
around the bottom end of the scope and
a dew shield when observing.
How does the scope perform under
the stars? "I love observing the Moon
with my refractor and a 7-mm Nagler
eyepiece, which provides a 'spacewalk
experience.' This reminds me of my
childhood, when I watched the live coverage of Apollo 11's lunar landing," says
Bertrand with nostalgia.
For more information, contact Bertrand at bertrand_remy@yahoo.fr.

Tours in 2019!
From 37,000 feet above the
Paciﬁc Ocean, you'll be high
above any clouds, seeing up to
3¼ minutes of totality in a
dark sky that makes the Sun's
corona look incredibly dramatic. Our ﬂight will depart from
and return to Santiago, Chile.

African Stargazing Safari
July 29-August 4, 2019

Total Eclipse Flight: Chile
July 2, 2019

skyandtelescope.com/2019eclipsef light

Join astronomer Stephen
James O'Meara in
wildlife-rich Botswana
for evening stargazing
and daytime safari
drives at three luxury
ﬁeld camps. Only
16 spaces available!
Optional extension to
Victoria Falls.
skyandtelescope.com/botswana2019

This is our 6th year
running this popular
tour of Iceland. Visit
historic sites, geysers,
and towering waterfalls
with a guide; at night,
seek the fabled northern
lights. Fine restaurants
and hotels await you.

Iceland Aurorae
September 26-October 2, 2019

skyandtelescope.com/iceland2019

■ Contributing Editor JERRY OLTION is
a big fan of short telescopes. Contact
him at j.oltion@gmail.com.

B ERTR A N D R EM Y (4)

The shroud
and front
shield protect against
stray light
and dew.

Australian Observatories
October 1-9, 2019

Travel Down Under to tour top observatories, including Siding Spring and "The
Dish" at Parkes. Go wine-tasting, hike
in nature reserves, and explore eclectic
Sydney and Australia's capital, Canberra.
Options to Great Barrier Reef and Uluru.
skyandtelescope.com/australia2019
Uluru & Sydney Opera House: Tourism Australia; observatory: Winton Gibson

See all S&T tours at skyandtelescope.com/astronomy-travel

sk yandtele scope.com * JA N UA RY 2 019

73

http://www.skyandtelescope.com/2019eclipseflight http://www.skyandtelescope.com/botswana2019 http://www.skyandtelescope.com/iceland2019 http://www.skyandtelescope.com/australia2019 http://www.skyandtelescope.com/astronomy-travel http://www.skyandtelescope.com

Sky & Telescope - January 2019

Table of Contents for the Digital Edition of Sky & Telescope - January 2019