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6. Eyepiece
Remove one eyepiece from its eyepiece holder (6) and slide it into the eyepiece
connection (3). Tighten the holding screws (No. 5). Start with the lowest
magnification eyepiece, which has the highest focal length printed on it (e.g.
20 mm or 25 mm, depending on your model) to locate objects and find the
correct focus. If you have the object you want to view centred in the field of
view, switch to a higher magnification by using an eyepiece with shorter focal
length. After changing the eyepiece, it might be necessary to adjust the focus
again (see section 8).
7. Dust cover
Remove the dust cover (15) that protects the objective lens of the optical tube
opening (2).
8. Focus wheel
To get objects into focus, your telescope is equipped with a precise focus con-
trol. When you use the telescope for the first time, you might need to turn the
focus wheel (4) multiple times to achieve a focused image. To try it out, pick a
landmark or a building far away in daylight or bright twilight, and turn the focus
wheel until the object comes into focus. Remember, objects to be observed
cannot be closer than 20 metres away.
9. LED viewfinder (only included with 90-62100)
The telescope with Art. No. 90-62100 is equipped with a LED viewfinder (10).
The LED viewfinder projects a red dot on the visor to help you point at objects.
For the first use, remove the plastic cover on the battery so the LED can be
switched on. To use the viewfinder, you need to align the finder to the telescope
optic. To achieve this, point the telescope at a landmark or building that is a few
hundred metres away and centre this object in the field of view while using an
eyepiece with a low magnification (e.g. 20 mm or 25 mm). Switch on the LED
viewfinder and adjust it using the alignment screws of the viewfinder.
Part II – Handbox
1. Batteries
Remove the cover of the battery compartment (11), located on the top side of
the mount's base, and insert the batteries in the battery holder (No. 2). Use 6
AA batteries and make sure the polarities are aligned correctly. Place the holder
into the compartment and cover it. Do not use rechargeable batteries.
2. Handbox
Ensure that the on/off switch is in the off position (No. 8). Remove the handbox
from the handbox tray (7), and plug one end of the cable into the port labelled
with "HBX" and the other one into the RJ-45 port of the handbox. Flip the switch
to the on position. The handbox display should light up, accompanied by a
sound.
3. Setup
Time and Date
After turning on the handbox, you will be prompted to enter the date and time.
Do so by navigating with the arrow keys and entering the numbers with the
number pad (7) on the handbox. When done, press the centre key (5), located
between the arrow keys.
Daylight saving time
If the daylight saving time is in effect, select status:on. If daylight saving time
is not in effect, select status:off.
Location
When asked for your location, you can either choose a city near you by selecting
the 'Country & City' option or enter your GPS coordinates by selecting 'Custom
Site'.
a) Country & City
Select the country where you are by using the up and down arrow keys. Then
select the city by using the left and right arrow keys. When done, use the centre
key (5) to select the location.
b) Custom Site
Enter the details of your location as follows:
Name:
Enter a custom name for your location.
Lon:
Enter the longitudinal coordinate of your location.
Lat:
Enter the latitudinal coordinate of your location.
Zone:
Enter the time zone of your location.
OTA (Optical Tube Assembly) Zero
Here you will be asked to provide the orientation of the telescope.
In the 'Azi:' field, enter '000'.
In the 'Alt:' field, enter '00'.
Open the Altitude and Azimuthal locking knobs. Adjust the telescope so that the
tube opening (2) is pointing directly north and is level. It is recommended that
you use the included compass (18) and bubble level to make sure the device is
positioned accurately. You can put the compass into the eyepiece connection
(3). Then retighten the locking knobs.
4. Alignment
In order to use your telescope's Go To mode, you must align the telescope
properly so it knows where it is pointing when it is turned on. There are three
ways to align your telescope: one-, two- and three-star alignment.
Step 1:
To start the alignment, press the centre key (5) on the handbox and
select the first menu option, 'Telescope Align'. There you will be able to choose
between one-, two- and three-star alignment.
The more stars you use for the alignment the higher the slewing precision of
your telescope will be.
One-Star Alignment:
Step 2:
After you select this option, you will be prompted to select a target star.
The software will select a star that is very visible in the night sky. If you happen
to know of a star you can see with the naked eye, you can choose it by pressing
the up and down arrow keys and then selecting it with the centre key (5). In
most cases, you will want to select the first option presented to you. Do so by
pressing the centre key (5).
Step 3:
The telescope will now slew to that star and will prompt you to centre
it in the field of view, which you can do by using the arrow keys. The star you're
focusing on is the brightest star in the region your telescope is pointing at.
When the star is centred, confirm the position with the centre key (5). The
telescope is now aligned.
Two- and Three-Star Alignment:
The procedure is similar to one-star alignment. The only difference is that you'll
have to repeat steps 2 and 3 twice or thrice depending on the type of alignment
you've chosen.
Note:
If you have aligned the telescope, don’t move it manually. Use the arrow
keys on the handbox to make adjustments. If you do move it manually or change
the tripod orientation, the telescope has to be realigned.
5. Further Adjustment:
Target Sync:
With this method, you can further improve the alignment of the telescope. After
slewing to a star target you know, you can centre the object precisely in the
field of view. Press the centre key (5) and select 'Telescope Align', then 'Target
Sync'. The telescope will align to that target and have more precise positioning
for further targets you want to observe.
Backlash Correction:
You can improve the precision of the telescope by training the backlash correc-
tion of the axis. This must be done separately for each axis and is not necessary
for most cases.
Simply go to the main menu by pressing the centre key (5) and select 'Telescope
Align' and then 'RA BKlash Corr.' to adjust the right ascension axis (horizontal
axis) or 'DEC BKlash Corr.' to adjust the declination axis (vertical axis). Then
follow the on-screen instructions.
Part III – Menus
Initial Start:
Welcome screen
Date and Time
Daylight saving
Status:
off
Status:
on
Custom Site
Name:
Lon:
Lat:
Zone:
Country & City
Country: up and down
City: left and right
OTA Zero
Main Menu Overview:
• Telescope Align
• One Star Align
Aligns the telescope with a single star
• Two Star Align
Aligns the telescope with two stars
• Three Star Align
Aligns the telescope with three stars
