Attaching ASI294 MC Pro to a Zenithstar 73 with flat73a

[Steorra]

I have just purchased a asi 294 mc pro and was wondering if anyone can help me. how do i attach it to the field flattener for the wo z73 and what would be the correct back focus im a little confused with it all.

[Adreneline]

Hi.

Have you seen this?:

This gives the spacing from the end of the flattener to the sensor as 54.80.

The ASI294MC sensor is set 6.5mm inside the camera so you need 54.8-6.5=48.3mm of spacers.

You just need appropriate M42 spacers to make up the gap.

Adrian

[Steorra]

is this plus the 11.4mm that it recommends for the flattener

[Adreneline]

16 minutes ago, Steorra said:

is this plus the 11.4mm that it recommends for the flattener

Well I don't know! What I do know is that when I had a WO scope (Z71) the equivalent diagram for that scope worked for me using a WO R/F.

[Steorra]

col. did some digging and i think it is in addition to the 11.4 thanks for the help.

[hadyn42]

Hi Steorra.

Have you had a look at this ZWO page?

Link:  https://astronomy-imaging-camera.com/tutorials/best-back-focus-length-solutions-55mm.html

Best regards,

Hadyn - IOM

[Steorra]

Yeah that what i found. Nice bit of info thanks for sharing. Just trying to figure out if the flattener need to be at 11.4 or if this is on top of the 55mm back focus

 

[Steorra]

https://www.cloudynights.com/topic/716740-william-optics-back-focus/

 

Found thias which answered my last question thanks for the help