Sky and Telescope - March 2016 - 65

PIERRE LEMAY

Lemay made the scope's hemispheric "ball"
using a Styrofoam form, which is shown here
being shaped with a router mounted in a jig.

Although lighter than his ﬁrst
attempt, the new hemisphere was still
heavier than desired. "I had made progress but was still heading for a 100-pound
tube assembly," he notes. Then inspiration struck. "After carefully considering
my options, it dawned on me that I could
lop oﬀ part of the hemisphere without
aﬀecting the scope's motions." To accomplish this, Pierre put together another jig
to accurately draw a cut line angled 30º
from the top of the existing hemisphere.
He made the cut freehand with a jigsaw.
As he reports, "It worked - I eliminated
14 pounds of plastic!" With the two most
diﬃcult components completed, building the rest of the optical tube was little
diﬀerent from putting together a normal,
truss Dobsonian.
Pierre's dream scope has a number of
nifty reﬁnements, including a motorized
drive and an ingenious rotating doubleeyepiece turret with helical focusers.
Even so, future modiﬁcations are already
looming. "I know it's a cliché, but when
I 'ﬁnished' the scope two years ago, little
did I realize it was only the beginning of
the project!"
Additional details on the construction of Pierre's scope can be seen at his
website: telescopelemay.com. ✦
Contributing editor Gary Seronik is an
experienced telescope maker and has led the
ATM department since 1998. You can contact him via his website, garyseronik.com.

www.observa-dome.com
As the country's oldest dome manufacturer, Observa-DOME has
developed an expertise unmatched in the industry. Our clients
are world-wide, from the United States Government to the
amateur astronomer. No matter what the use, the climate, the
installation, the design, Observa-DOME meets the challenge.

NASA MCAT
7-Meter Fast Tracking Dome
Ascension Island

Phone (601) 982-3333  (800) 647-5364
Fax (601) 982-3335  mail@observa-dome.com

371 Commerce Park Drive
Jackson, MS 39213

Sk yandTelescope.com March 2016

65

http://www.obsessiontelescopes.com http://www.observa-dome.com http://www.telescopelemay.com http://www.garyseronik.com 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
Sky and Telescope - March 2016 - 8
Sky and Telescope - March 2016 - 9
Sky and Telescope - March 2016 - 10
Sky and Telescope - March 2016 - 11
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Sky and Telescope - March 2016 - 40
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Sky and Telescope - March 2016 - 65
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Sky and Telescope - March 2016 - Cover3
Sky and Telescope - March 2016 - Cover4
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