USE OF IHE SETIING CIRCLES:
The locorion
of ony obiect in the sky wiihin ihe
ronge of the telescope is
determi.ed by
irs
rlght
oscension lhour
ongle) ond declinotion, very much os
ploces
on eorth ore ocored by
lotitude o nd longriiude.
The setting circles
permit
yoo to index dtectly to
ony sror by setting
your
ielescope 10 cored
position
os indexed in on olmonoc or sior colologue.
The
TASCO mounting is compleiely equotorio ond
lhe hour
circle
(R.A.)
is
deslgned
to be used with
the
single index system or the double lnder
sysrem.
To moke full lse
of
the
seiiing
ci.cles with elther
system it is
necessory to prepore your equoloriol
mou.ting for
your
po
iculor ploce of observotion
by co(ecling o.y
iidexing
edor o{
ihe circles ond
their indicotoE in relotion to
yo!, geogrophicol
locotion. I is nol necessory 1o
use
your lelescope
for rhese odiustmenis. The corection
procedures
ore
simple o.d only require
reosonoble
core
in moking
L Mork ielescope crodle lo show obiedive end.
2. Moke sure
thot ihe tripod
heod
is
level
in
oll
3. Double check lhe
poor
oxis seilln9 {or lhe
loiitude ond ozim!ih ong es.
I.
Ploce 'he moLnrirg i. pos_ion
o.
howr '.
rgLr.
i.
DO
NO-
CFANGT LAI IUDT SI
II
\G
5.
Remove lhe
couiterbolonce
weight from the
couirerbolonce rod. Use
the
rod
to
supporr o
6. Level
the
declinolion oxis while resring rhe level
on
lhe
colnter boldnce rod. Tighren lhe hour
oxis
clofrp screw
(porl
30r.
7. Slip,lurn rhe hour
circle so
rhot the
0-0
mork
of
rhe hour
cncle
is in line wilh the
FIXED indicotor.
L
Adiust moving indexes lby
bendiig) so
thol
they
point
io figures
6 18, 6'6 of
lhe hour
cLcle.
9. Loosen the
decllnolion clomp screw
(port
24)
ond
ploce the
level in rhe ielescope
crodle
Move the
cfodle unril level. Lo.k the
declinotion
clomp screw Reod rhe
degrees opposile
rhe
declinolior cncle indicotor
10.
Now,
loosen ihe
clomp screws, swing the crodre
lo rhe
opposile slcie ol lhe lripod moking sure
rhor rhe
obiective end is
poinring
os belore
ond repeoi lhe leveling pro.edures.
Do
not
chonge
polor
oxis or ozimuth
settings. Reod
rhe
degree seiting opposile ihe
declinouon
indico
ior. li
probobly
wi I not
be
the
some. Split the
difference
berwen
these
two reodings ond
core-
fully bend lhe deciiolon
lndicotor
(po
26l
to ihis coiiecled
selting.
This
e
iminotes
lhe etror
of difference berwee.
iro sides
oi
the teles.ope.
ll. Loosen
the
declinotion
holr clomp screw
ond
swins the crodle in
no.th
ond
south declinotion.
'r.
c odle
is
"On
The M..id o."
wh
cl- svey
imporloni in
ihe
colculotions of
hour ongles of
rhe srors.
rhese
colculotioris ore
dlwoys figured
from
your
meridion.
12. Mourt your telescope
in the
crodle
ord clomp
securely. Loosen
rhe
decliiotion cldmp
screw ond
sei lhe declinotion ci.cle ot
90'.
Double
cnecr
io moke sure ihol0-0 is opposiie
the
fixed index
ond
ihoi ihe movins lndex opposite 6-18.
13. Yo!r lelescope is now in zero
position
ond
is
poiriing
ot rhe celestiol equotor ond
you
ore
now reody ro
index
directly 10 o stor.
WITH THE DOU8LE
INOEX
SYSIEM NO
ANITHMETIC
IS NEEI'ED!
With double indexlng
you
i.dex directly
ro
side.eol
time
ond
then index
directly
to
R.
A.
of the slor.
For
exomple,
if you wish to find
o stor
rhol is
corologued
ot
2:00
R.
A. when ir is
5,00 sidereol
iime,
jr
is
only
necessory to
slip-lurn
lhe hour
circle
to pur
sidereol
lime
(5:00)
of
the
outer
hour
cncle
in ine with the
MOVINC index. Loosen
the holr
oxis clomp screw
(port
301 ond
turn the te
escope
(lhe
hour circle will
move wiih itl in the needed direcuon lo
pli
3:0O
of
lhe inrer circe in line wiih ihe FIXED index.
Loosen declinoiion clomp screw
(port
24) ond move
lelescope until
proper
declinoiion ongle is indicoied
ond clomp
tight.
Use
the Wlde View
eyepiece
(50X)
10 locote the
sior
in the lield
of
view
Use {lexible
controls
to
briig
the
sror
to the inteGeclion
of the
cross-hoirs of the linderscope. Now, you con follow
rhe tor for ons
periods
of iime by
orly
odvoncing
the hour oxis wilh the {lexible control. f you hove
the
electric clock drive it con now be engoged ond
will lollow
ouiomoricoly.
You
con
move
trom one stor
lo onother following lhis procedure.
The only
rime
it is ne.essory ro
chonge
the
serup is
when you
90
from
one side of
the tripod io
ihe olher. Then you
musr
relurn
the telescope
10 zero
position
ofter which
you proceed
os before.
SINGLE II{DEXING SYSIEM
lf you
orc o
methodicol person
ond enioy
doing
lhings i. rhe
scienlific woy using the nece$ory orilh-
meric involved then the
siDg e indexing system is
For
single
index you
do not sel direclly to R.A.,
but rother to o known ongle
os colculoted for o
certoir stor ol o ce oin sidereol iime. Let
us
o$ume
thct it is 4:00
sidereol iime ond yoo wonl to find
o
slor
lhot is
oi R.A. 1,00. ll is nece$ory to subshoci
1,00 R.A. from the 4:00
sidereol
time.
The resut
wolld
be 3:00 west.- Since
our
exomple gives
o
3:00W. colculorion the telescope is ploced
o.
rhe
eost side
of
the tripod ot zero posiiion. Slip'tur. the
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