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The C6 has a comparatively dim view and the stars are boring little blobs.

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This statement has me a little baffled. I have all three of the scopes/binocs you mentioned and I don't think its possible to compare equal magnifications with either one of them. I love my 15x70's so don't get me wrong, but they will never show me the Ring Neb. The lowest power on the C6 is around 35x with an exit pupil of 4.0mm.

The AT66 is a great little scope too but by the time you pump enough mag in it to see the Ring it's going to be pretty dim, if you can see it at all. If you look at exit pupils as a guide, the AT66 at 1.0mm exit pupil yields 66x. The C6 with a 1.0mm exit pupil gives 150x. Big difference. At 0.5mm exit pupil (3mm eyepiece), the AT66 is only at 132x and has exceeded 50x per inch of magnification.

When I look at clusters like the Double Cluster with the C6, I see bright well defined stars, many with color. On the other hand, planetary views are just okay, but certainly better than the AT66ED.

I'm not sure what's going on...maybe you just don't like the slightly softer view of the SCT, although of all the SCT's I've looked thru, the C6 has had the least amount of softness.

Patrick

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Discovery 10" f/6 Split Tube Dob
Celestron C6 SCT
Denk Binoviewers
AT66ED Refractor
Oberwerk Ultra 15x70 Binocular
475B Geared Tripod & 501HDV Head
Oberwerk 9x60 Binocular
Celestron Regal 8x42 Binocular
Canon 30D DSLR
Mini EQ1


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