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
Sky and Telescope - March 2016 - 12
Sky and Telescope - March 2016 - 13
Sky and Telescope - March 2016 - 14
Sky and Telescope - March 2016 - 15
Sky and Telescope - March 2016 - 16
Sky and Telescope - March 2016 - 17
Sky and Telescope - March 2016 - 18
Sky and Telescope - March 2016 - 19
Sky and Telescope - March 2016 - 20
Sky and Telescope - March 2016 - 21
Sky and Telescope - March 2016 - 22
Sky and Telescope - March 2016 - 23
Sky and Telescope - March 2016 - 24
Sky and Telescope - March 2016 - 25
Sky and Telescope - March 2016 - 26
Sky and Telescope - March 2016 - 27
Sky and Telescope - March 2016 - 28
Sky and Telescope - March 2016 - 29
Sky and Telescope - March 2016 - 30
Sky and Telescope - March 2016 - 31
Sky and Telescope - March 2016 - 32
Sky and Telescope - March 2016 - 33
Sky and Telescope - March 2016 - 34
Sky and Telescope - March 2016 - 35
Sky and Telescope - March 2016 - 36
Sky and Telescope - March 2016 - 37
Sky and Telescope - March 2016 - 38
Sky and Telescope - March 2016 - 39
Sky and Telescope - March 2016 - 40
Sky and Telescope - March 2016 - 41
Sky and Telescope - March 2016 - 42
Sky and Telescope - March 2016 - 43
Sky and Telescope - March 2016 - 44
Sky and Telescope - March 2016 - 45
Sky and Telescope - March 2016 - 46
Sky and Telescope - March 2016 - 47
Sky and Telescope - March 2016 - 48
Sky and Telescope - March 2016 - 49
Sky and Telescope - March 2016 - 50
Sky and Telescope - March 2016 - 51
Sky and Telescope - March 2016 - 52
Sky and Telescope - March 2016 - 53
Sky and Telescope - March 2016 - 54
Sky and Telescope - March 2016 - 55
Sky and Telescope - March 2016 - 56
Sky and Telescope - March 2016 - 57
Sky and Telescope - March 2016 - 58
Sky and Telescope - March 2016 - 59
Sky and Telescope - March 2016 - 60
Sky and Telescope - March 2016 - 61
Sky and Telescope - March 2016 - 62
Sky and Telescope - March 2016 - 63
Sky and Telescope - March 2016 - 64
Sky and Telescope - March 2016 - 65
Sky and Telescope - March 2016 - 66
Sky and Telescope - March 2016 - 67
Sky and Telescope - March 2016 - 68
Sky and Telescope - March 2016 - 69
Sky and Telescope - March 2016 - 70
Sky and Telescope - March 2016 - 71
Sky and Telescope - March 2016 - 72
Sky and Telescope - March 2016 - 73
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Sky and Telescope - March 2016 - 76
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Sky and Telescope - March 2016 - 81
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Sky and Telescope - March 2016 - 83
Sky and Telescope - March 2016 - 84
Sky and Telescope - March 2016 - Cover3
Sky and Telescope - March 2016 - Cover4
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