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Hi Glen,
I have often wondered, do the users of full frame cameras spend 70% of the time cropping their images to highlight the chosen target. Galaxies, planetarys and globs do not need large real estate, as most of the sky will be cropped out.
The only benefit is on large scale structures like the Rosette, Corona Australis, the M42/running man complex etc.
The down side for a newt anyway is maintaining a fully illuminated chip. For a fast newt this would require a larger secondary, 3 inch focuser, bigger OAG and possibly a wider coma corrector. The interface for large frame cameras is a M54 port so all the plumbing must be wider than this as you get closer to the secondary.
Not to mention more expensive filters if a mono camera, even a 2 inch may be too small.
Coma, tilt and field curvature stick out like a sore thumb with a large chip and you need a lot of patience to overcome it.
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