Field flatteners and barlows in an image train

[Helen]

Just wondering how I would put a 2x powermate into my refractor image train while keeping a flat field.  I'm using a flattener not a flattener/reducer.  Would I go flattener then barlow, or the other way around? and how would the flattener to chip distance be affected??  (If it was flattener then barlow then I'd also need a t-thread to eyepiece holder and that would add rather a large distance!)

Thanks

Helen

[RolandKol]

I would suggest just simply try without flattener...

I doubt you will like what you will see and you will forget this idea, unless, you go for planet hunting, in this case, you do not need flattener anyway.

[vlaiv]

Just skip flattener.

With x2 barlow you will effectively image only central part of the field (half of width and half of height) - and this part of the field should have minimal curvature. It takes very curved field to have much impact in this region.

[Helen]

Ok, thanks both ?

Helen