How to connect ASI6200MM Pro to 2″ EFW/M54 filter drawer and M68 OAG?
How many solutions are there for ASI6200MM Pro to get 55mm back focus length?
How to connect ASI6200MM Pro to the M68-thread telescope side?
If you are still stressed with these problem, then this tutorial is exactly what you are looking for.
There are five connection solutions for ASI6200MM Pro.
1. Using adapters only
This solution needs the M48-M48 16.5mm extender and the M54-M48 21mm extender. You can find them in the package of the ASI6200 camera.
2. Using 2”EFW
This solution needs M48-M48 16.5mm extender and the M54-M48-2 adapter (come with the 2” EFW). You can also buy the M54-M48-2 adapter separately.
You need to disassemble the back cover of the 2”EFW and then fix it to the camera via the screws.
3. Using M54 filter drawer
It is much easier to connect to M54 filter drawer than to the 2” EFW with the M54* 0.75 male thread of the filter drawer, as the picture shows below:
Please note that the back focus length of the solution 2 and 3 is 56mm, and the M48-M42 adapter will block the sensor for a little bit as the diagonal of the ASI6200 sensor is already 43mm.
Thus, we more recommend you go solution 4 and 5.
4. Using M68 OAG and M54 filter drawer
This solution only suits for the telescopes with M68 thread side.
5. Using M68 OAG and 2” EFW
This is the very first and also the most recommended connection solution. The combination of the mono full-frame camera and 2”filter wheel can create many possibilities on your astrophotos. The use of OAG will also help simplify your imaging setup by replacing the guide scope. It’s very suitable for the middle and high-level astrophotographers.
The installation of the M68 OAG, 2” EFW and ASI6200 camera is not very complex, but considering you need to remove the sensor tilt adapter of the camera first, so we’d like here teach the detailed connection steps to help you quickly complete installation without making mistakes.
The detailed guide of the firth connection solution:
1) Disassemble the 5mm sensor tilt adapter on the main camera with the help of a screwdriver:
2) Remove the back cover of EFW:
3) Disassemble the filter wheel carousel (Note: Please do not disassemble or move the central screw of this carousel, otherwise the EFW will be damaged):
4) Align the four screw holes of EFW with these in the four corners of the camera chip as shown below:
5) Tighten the screws at the interface between the EFW and the main camera:
6) Install the filter wheel carousel:
7) Fix the M68 OAG to the back cover of EFW(Note: You may reposition the prism to make sure it would not block the sensor):
The M2.5*8 screws used here can be found in the package of M68 OAG.
8) Fix the 5mm sensor tilt adapter to this M68 OAG. If the thread of the telescope side is M42 or M48, then you should use the M54 sensor tilt adapter just removed from the camera. While if the thread of the telescope side is M68, then you should use the new M68 sensor tilt adapter.
9) Attach the back cover of EFW to the front cover:
10) Installation completed.
Note: Please make sure the prism does not block the sensor or your telescope.
Adjust the focal length of a guide camera by using the guide knob.
Would be better if you finish the above steps during daytime, as it is very difficult to adjust it accurately at night.