Posted By Mike Ratcliff
Got to thinking about this after reading R. F. Royce's website (premier mirror maker) where he said he only used a few plossls and barlows.
For a common 1200mm focal length (10" f/5, 8" f/6, 6" f/8) this would give 38x, 48x, 60x, 94x, 120x, 150x, 188x, 240x, 300x.
Optical excellence, comfortable eye relief (12.5mm UO ortho bothered me even though I don't wear glasses), good magnification coverage, much cheaper than say 5 Naglers.
Disadvantages: 50 degree field of view, awkward swapping of equipment
I look at both planets and DSO's. Undriven dob.