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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

6200-55mm-backfocus-solution-1 (2)

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

6200-55mm-backfocus-solution-2 (2)

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

6200-55mm-backfocus-solution-3 (2)

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:

6200-M54 filter drawer

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

6200-55mm-backfocus-solution-4 (2)

This solution only suits for the telescopes with M68 thread side.

 

5. Using M68 OAG and 2” EFW

6200-55mm-backfocus-solution-5 (2)

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:

connect ASI6200 with 2inch EFW-1

2) Remove the back cover of EFW:

connect ASI6200 with 2inch EFW-2

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):

connect ASI6200 with 2inch EFW-3

4) Align the four screw holes of EFW with these in the four corners of the camera chip as shown below:

NO.5 对准EFW与主相机接口位置

5) Tighten the screws at the interface between the EFW and the main camera:

connect ASI6200 with 2inch EFW-5

6) Install the filter wheel carousel:

connect ASI6200 with 2inch EFW-6

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.

connect ASI6200 with 2inch EFW-7

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.

connect ASI6200 with 2inch EFW-8

9) Attach the back cover of EFW to the front cover:

connect ASI6200 with 2inch EFW-9

10) Installation completed.

connect ASI6200 with 2inch EFW-10

 

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.

60 Responses to [ASI6200 Guide] 5 connection methods to get 55mm back focus length
  1. Avatar

    Can you provide the instructions to connect the ASI 2600MC Pro with the 2″ Filter Drawer (m54) and the New OAG (M68), How to connect for backspace 55 ? The output of the reducer 0.79x being m48.
    Can we buy a new m42 to m54 sensor tilt adapter from the ASI 6200MM Pro ?
    Thank you.




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    • Avatar

      Sorry the 2″ Filter Drawer (m54) was specifically made to match with the full-frame cooled camera ZWO ASI6200MM/MC Pro. It can’t connect to the ASI2600MC Pro. And the female thread of the Filter Drawer is M54, it can’t connect the M48 reducer. You could use M42 filter drawer and ZWO OAG to connect ASI2600MC. Sorry we don’t have M42 to M54 sensor tilt adapter.




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      • Avatar

        Hi,
        I have the same issue.
        I use a Tak FSQ106 with 0.73x reducer.
        With this reducer and at F/3.6, the basic OAG can’t cover the APS-C format because of the shadow of the prism.
        Why don’t you offer the same options for the ASI2600 than for the ASI6200 ?
        Could we order the ASI2600 with the M54 tilt adapter in place of the M42 one?
        The M54 tilt adapter is not in your Accessories options. Only M42 or M68.

        For all telescopes < F/4, your M42 solution isn't correct to cover the APS-C format with the basic OAG.
        Thank you.




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          Sorry we don’t have M54 tilter. You could try move the prism to reduce the shadow. And the occlusion of the prism will not have much effect on the imaging.




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          • Avatar

            Thank for your answer that not satisfy us :(
            I’m pretty sure that we are many users that need:
            – the M68 OAG
            – the M54 filter drawer to use ASI2600 with dual-narrowband filter
            This M42 solution isn’t viable for all the scopes below F/4.

            For myself i use a very expensive scope (Tak FSQ106) and i already use the ASI6200 with another scope (AP 130 GTX). I cannot consider to have vigneting or shadows due to the prism because ZWO won’t provide just a little M54 adapter (this adapter exists and is standard in the ASI6200).

            Can you consider our request and tell your technical department to provide the M54 tilt adapter as a standard solution for the ASI2600MC or as an option solution, in fact we need exactly the same options than for the ASI6200 color one.

            This is not a new reference to create or a new adapter to produce, all are still existing.
            We just need to have the opportunity to use our expensive setups in the best conditions possible :)

            A big thank you :)




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  2. Avatar

    Can I use the 6200mm with an oag and filter wheels connecting to canon ef lenses




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  3. Avatar

    I know this is not made for the ASI1600MM. But I already have 2 inch filters from another project.
    Can I plug the M54-M42F Adapter on this Filterwheel as well on my ASI1600MM?




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  4. Avatar

    Is there a way you can use the filter drawer and the M68 OAG with the ais6200 mm?




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    • Avatar

      Yes, you could try the following way: ASI6200(12.5mm) + M54 filter drawer( 20mm) + M68 OAG(17.5mm) + telescope.
      Note: If your telescope has M68 threads, it can directly connect with M68 OAG. Otherwise you need to customize an adapter.




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  5. Avatar

    Can the EFW be attached to ASI071MC Pro camera? If yes, could you, please send me a diagram with instructions.
    Thank you.




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  6. Avatar

    Hi,

    Can I use an SX Lodestar II guide camera on the OAG with this camera?
    Also, could I use a 6mm camera rotator between the FW and Camera without causing vignetting?

    Thanks
    Jon




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      Yes, you can use Lodestar II guide camera on the OAG. The vignetting might be caused by shelter, filter hole, interface or large senser.
      Could you tell me what 6mm camera rotator looks like? And how to connect with EFW and camera?




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  7. Avatar

    Hi, I wonder if the new ASI071MC PRO will have the same housing and 55mm backfocus, so does the 071MC PRO can be combined with in the same way with the ZWO 2″ EFW as well? Thx




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  8. Avatar

    Is there a way to connect a Nikon lens directly to the EFW withe proper backfocus? The available M54 Nikon adapter works great with just the camera, but does not provide proper back focus when used with the EFW. Thanks




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  9. Avatar

    Hi. I do not have an OAG, so I’ll just use the configuration ASI6200+tilt adapter+2″EFW+M54-M48 adapter+M48-M48 16.5MM adapter. My problem is that the M54-M48 adapter is loose (it doesn’t have a position where it stops rotating inside the M54 thread of the EWF exit hole) and therefore the 16.5MM adapter and everything that is connected to it (other adapters and coma corrector) is not securely tightened to the EFW. What am I doing wrong ? How can I make everything securely tight ?




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  10. Avatar

    Can I use EFW and M68 OAG on ASI094MC just like ASI6200?




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  11. Avatar

    Can this setup be connected as is to a canon 100-400L IS lens? Or do we need additional connectors? What other accessories will i need to mount the camera and the lens together




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  12. Avatar

    Hi,
    Will you build an Adapter for Canon Lenses in combination with ASI6200 and Filter wheel.




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  13. Avatar

    Are all the threads from the camera to the scope 42mm?




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  14. Avatar

    How does this filter wheel connect to the ASI294MC Pro?




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  15. Avatar

    How is the connection without the OAG? If the EFW is fied with screw tot he ASI6200 directly, what would the connection be on the telescope side (M48) without the OAG? How would the tilt adapter fit in?




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  16. Avatar

    Will this Configuration also work with the ASI2600MC Pro? Can you provide the same instructions to connect the ASI2600MC Pro with the 2″ Filter Wheel and the New OAG? Thanks in advance :) I have ordered the ASI2600MC Pro and will need instructions for this.




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  17. Avatar

    If I may telle something : it will be interesting to put the sensor chip 90° the position you show on your picture. Doing that, it is easier to balance on a newtonian telescope, et and you can do the right orientation for delta and alpha (alpha on the long side of the sensor, delta on the small one.
    If I explain badly, don’t hesitate to ask. But your solution is also very cool!




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      Thanks for your feedback and I will sent your message to our devs.
      When you connect the camera to the scope, the orientation of the camera won’t always be fixed as it is shown in the picture.




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  18. Avatar

    Can sensor tilt adapter be skipped? it seems like it can cause some vignetting.




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  19. Avatar

    ASI6200MM Pro, 2” EFW and M68 OAG – assuming all the filter wheel positions are utilized, what is the approximate weight of this assembly?




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  20. Avatar

    Does this filter wheel have adapters to connect to other cameras, such as a DSLR?




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