[marki]

So the real answer here would be to have a curved CCD that matched the error present in the optics yes, just like they used to do with the old film schmidt camera's. Obviously this would be too hard to do economically and possibly beyond any current technology. My previous comment was aimed at the common use of the term "flat field" relating to many scope types and their various flatteners as this is clearly misleading, there will always be some curvature present. My problem with this is while the hype remains manufacturers can charge excessive amounts for scopes as is evident by celestrons pricing for these scopes in OZ. The edge HD optics are not flat but are better (have 1/3 the curvature) then an SCT without a corrector. That said it is good to hear that yours can provide a reasonably flat and evenly illuminated field across the entire 16000 chip. Yes I have had a look at some of the images and they appear promising with nice round stars out to the edge but I think they lack the sharpness and fine resolution I have seen in similar images from the CDK scopes. This may very well be in the processing applied by the users?????/

Mark