Hi,
At last, I bought Takahashi EM11 Temma2 Jr which is famous for one of the best equatorial mounts. But I have a little worry about its age
Through the test I've found that
even the slew speed of mount is quite slow, but it's quite stable and other operations such as azimuth and altitude adjustment for polar alignment, focus control is very smooth.
I could feel more than one level higher, comparing to the previous light mount with 5kg payload.
In general I am very satisfied except one thing.
Here are what I did at last night:
After polar aligning using SharpCap & guide camera only with the mount power-off, the mount positioned toward NCP apparently.
And I turned on the mount to recognize this position to NCP as the home position.
And then I executed ATP and Stellarium, I tried to slew to famous stars to focus more accurately.
However
when I executed the goto to an object in APT and Stellarium such as Deneb, Vega etc,
the destination always deviated to the target quite far away even though I'd correctly entered required information for latitude, longitude,altitude in the mount property at the begining.
Attached files are related to this;
(After polar aligning using SharpCap & guide camera with the mount power-off, the mount positioned toward NCP apparently.)
For test purpose I just tried to do goto to Polaris/NCP using Stellaruim (Find Polaris and press down ctr+1),
however strangely the mount started to move and located to other position in right below corner.
I attached relevant pictures
- Pic 1. Mount property setting at connection
- Pic 2. Actual telescope location right after polar aligning, shown in Stellarium (You can find the telescope location in left upper corner)
- Pic 3. After goto Polaris for test, Stellarium showed the telescope location was same as Polaris, but actual positioning of real mount went toward around M31 right below of Polaris.
Please advise me why it happened and what I have to do to solve this problem.
Best regards,
James