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PART XI : ADVANCED FUNCTIONS
•
The initial polar alignment should not be too far off to avoid the polar alignment error in
azimuth exceeding the adjustment range of the mount.
•
It is necessary to use a reticle eyepiece in the 2-Star alignment, 3-star alignment and polar
alignment process.
•
Generally, the cone error in a telescope-mount setup might reduce the accuracy of this
polar alignment process. Therefore, it is recommended to reduce or eliminate the cone
error before the polar alignment process
ON EQUATORIAL MOUNTS).
•
It is recommended that the user verifies the accuracy of the 2-star alignment or 3-star
alignment before starting the polar alignment process by locating several objects in dif-
ferent areas of the sky. If the pointing accuracy is low, try to use another set of alignment
stars for the 2-star or 3-star alignment process.
11.4 Camera Control
The SynScan hand control can control a DSLR camera to do astrophotography. It can accept
8 groups of "Exposures Time - Frames" parameters, and then controls the camera to take
batch exposures without manual intervention.
To use the camera control function, the camera must be equipped with a shutter release con-
trol port and can be set to the bulb exposure mode.
Connecting the Camera
1.
Using the SNAP port on the telescope mount:
Several Sky-Watcher's equatorial mounts (such as the AZ-EQ6 GT and the EQ8) are
equipped with a SNAP port. Users can use a proper shutter release control cable to con-
nect this port to the same port on the camera.
Using the multi-purpose port on the SynScan hand control:
2.
The SynScan hand control uses 2 pins (The SHUTTER and COMMON pins in the dia-
gram of
3) of its multi-purpose port to control the shutter release of a DSLR
Appendix
camera. Users may use a proper shutter release cable to connect the SynScan hand
control and a camera.
Setup Control Parameters
UTILITY
1.
Press the "
" shortcut key, access to sub-menu "
and press the
ENTER
key.
Edit the interval between each exposure (in MM:SS format) and press the ENTER key .
2.
3.
Use the scroll keys to browse through a list of 8 groups of parameters. A sample screen-
shot is shown below:
The leading number ("
1
") is the index number of this group; the "
posure time in minutes and seconds; and the ending 3 digits number is the frames to be
shot. Press the
ENTER
key to pick a group and proceed to the next step.
(Refer to
APPENDIX 1 : ELIMINATING CONE ERROR
Camera Control \ Configuration
Select a Group
1. mm:ss X 000
mm:ss
" data is the ex-
36
The first row of the screenshot below indicates the index number of the group being edited.
3.
The second row shows the exposure time of this group.
•
Use the left and right keys to move the cursor and use the numeric keys to fill the dig-
its with the cursor. Press the
•
Now the screen is changed to set the frames to be shot for this group, as shown be-
low. Use the left and right keys to move the cursor and use the numeric keys to fill in
the digits with the cursor. Press the
•
The SynScan hand control will return to the status of
edit another group of parameters.
Note: To disable a group, set either the "
4.
After setting all groups of the parameters, press the
cess.
Batch Exposure
Set the camera to bulb exposure mode.
1.
Press the "
2.
press the
The SynScan hand control will start to take batch exposure and display the progress data
3.
on the screen, a sample screenshot is shown below:
•
The top row shows the group index and the frames pending.
•
The bottom row shows the remaining exposure time of the current frame.
"
•
At the end of each frame, the SynScan hand control will wait for the preset interval
before the next exposure.
During the batch exposure, users can press the
4.
screen will display "
exposure or press "
Edit Group#1
Exposure mm:ss
ENTER
key to end setting the exposure time.
ENTER
key to end setting the frames.
Edit Group#1
Repeats 000
Exposure
" or the "
UTILITY
" shortcut key, access to the sub-menu "
Enter
key.
Shooting#1: 003
Released mm:ss
ESC
Shoot Suspended. 1) Resume 2) Exit
2
" key to exit.
Shoot Suspended
1) Resume 2) Exit
37
PART XI : ADVANCED FUNCTIONS
Step 2
for users to choose and
Repeats
0
" parameters to
.
ESC
key to exit the configuration pro-
Camera Control \ Shoot
", and
key to suspend the operation. The
1
". Press "
" key to resume batch
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