Field Flattener Compatibility

[tommo4523]

Hi everyone,

I am looking to purchase a field flattener for my TS 80mm f/7 FPL-53 doublet, I current have these adapters for my Canon 500D:
http://www.sirius-optics.com.au/sirius-optics-canon-eos-t-ring.html
http://www.sirius-optics.com.au/sirius-2in-m42-t-adapter.html
I was wondering is there a specific field flattener I need or can I use a universal one without any side effects such as this:
https://www.365astronomy.com/TS-Universal-2-Inch-Field-Flattener-for-Refractors-from-f-5-to-f-8.html
Also will the thread from that flattener just thread onto the 2 inch end of my M42 to 2 inch adapter or do I need another component to make everything work?

Thanks,
Tom,

[glend]

This is the one that TS recommend for that scope, their TS Flat 2,5.

https://www.teleskop-express.de/shop/product_info.php/info/p2646_TS-Optics-REFRACTOR-1-0x-Flattener-for-full-sized-sensors---M68-connection.html

Note the TS Flat2,5 has an M68 x1 thread to attach to the focuser.

[tommo4523]

Will that fit on the thread of the GSO 80mm 2 inch extension tube or do I need more adapters?