Sky & Telescope - December 2020 - 66

S&T Test Report by Richard Tresch Fienberg

The Unistellar eVscope
Does this little reflector live up to the claim "100× more powerful than a regular telescope"?

Unistellar eVscope
U.S. Price: $2,999 plus shipping.
unistellaroptics.com

What We Like
Ease of setup and use
Excellent image quality
Extensive manual control
Citizen-science features

What We Don't Like
Glow in eyepiece barrel
Tiny camera sensor
Narrow field of view

66

DECEMBER 2 02 0 * SK Y & TELESCOPE

S Unistellar's eVscope is no ordinary Newtonian reflector. It offers "enhanced vision" views
of deep-sky objects by taking long-exposure
digital images and displaying them both in the
eyepiece and on the screen of a smartphone or
tablet connected via Wi-Fi.

shows the spiral arms of the Whirlpool
Galaxy and the red glow of hydrogen
gas and the dusty "pillars of creation"
in the Eagle Nebula, even from a city.
The eVscope doesn't violate any laws
of physics. But when you look into
eVscope Inside & Out
its eyepiece in "eV" mode, you're not
You can tell at a glance that the eVscope
looking at the photons
is no ordinary reflector
collected by the optics,
because the eyepiece
as you would in an ordiis at the "wrong" end,
nary instrument. Those
near the altitude axis
have been intercepted by
and primary mirror.
a sensitive digital camThat's a good thing,
era and converted to a
though, because it
display on a small color
means the eyepiece
screen - so you're lookposition doesn't change
ing at a long-exposure
a lot as the telescope
image. I was skeptical
points around the sky.
S The eVscope's eyepiece is
that this would feel any- really a tiny OLED monitor.
Instead of holding a

A LL PHOTOS BY AU THOR E XCEPT
WHERE OTHERWISE NOTED

LET'S BE HONEST: To the untrained
eye, most celestial objects look unimpressive in a typical backyard telescope.
Sure, there are exceptions, such as
the Moon, bright planets, the (safely
filtered) Sun; the most colorful double
stars; and about as many showpiece star
clusters, nebulae, and galaxies as you
can count on your fingers and, if you're
generous, your toes. But most of the
deep-sky objects in celestial atlases and
catalogs are not worth showing to our
nonastronomer friends and neighbors,
because the dim gray views in the eyepiece just can't compare with the bright
colorful Hubble images the public has
gotten used to seeing.
Unistellar, a crowd-funded startup
with offices in Marseille, France, and
San Francisco, California, has come
up with a solution: the eVscope, or
"enhanced vision" telescope. Advertised
as "100× more powerful than a regular
telescope," the eVscope - a mere 114mm (4.5-inch) f/4 reflector - plainly

thing like looking through a "normal"
telescope. But when I pointed the unit
that Unistellar loaned us at my first
deep-sky target, turned on eV mode,
and peered into the eyepiece, I surprised
myself by jumping up and down and
shouting like a little kid.
The eVscope also makes deep-sky
astrophotography effortless and enables
users - even those just getting started
in astronomy - to make scientifically
valuable observations. The more I used
it, the more I came to appreciate what a
game-changer it could be.


http://www.unistellaroptics.com

Sky & Telescope - December 2020

Table of Contents for the Digital Edition of Sky & Telescope - December 2020

Contents
Sky & Telescope - December 2020 - Cover1
Sky & Telescope - December 2020 - Cover2
Sky & Telescope - December 2020 - 1
Sky & Telescope - December 2020 - Contents
Sky & Telescope - December 2020 - 3
Sky & Telescope - December 2020 - 4
Sky & Telescope - December 2020 - 5
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