SW ED100 and ZWO ASI290MC camera.

[Chris M48]

Can I incorporate my .85x Flattener/Reducer with this combination or is it solely for DSLR?

If so, what adapter will I need?

Will bypassing the Flattener ruin any prospect of decent images?

Any help will be appreciated.

Clear skies. Stay safe.

[lukehill]

I am also in this dilemma and i will look to see how other members reply.

[fireshipjohn]

The reducer aspect is still useful  (if desired), the flattener aspect corrects the image distortion towards the edges of the frame, for a small sensor it will have no effect, but will cause no harm also! 

If it's like my ED80 the .85x Flattener/Reducer presents a 48mm thread, you probably need a 48mm/42mm (T thread) adaptor, https://www.firstlightoptics.com/adapters/astro-essentials-m48-to-t2-adapter.html but I would check with FLO  

The spacing to your sensor is critical, from the back of the Flattener/Reducer you need 55mm to the plane of the sensor. See this useful guide on the ZWO site:

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

[Chris M48]

Thanks fireshipjohn for some good guidance.

FLO are sending me the adapter.

Great stuff.

[lukehill]

thank you for this information