Thanks Matthew, good advice. That, along with Kevin's good visual experience with the SW120 (and astounding results with some *very* patient post-processing astrophotography), has largely tipped me over to that choice. But I'll 'cool off' for a while and not 'pull the trigger' for a few days.
I must admit, getting 2.7 degree fields on the 120mm with my Panoptic does seem like plenty, and the 2.2 degree TFOV with my Nagler T5 16mm will also be nice. It's probably sufficient, as you note, little reason to push for 3 degrees.
Just one thing, you said:
Quote:
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Had a 102 f5 and the FC was pretty bad
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Could you expand on this a little? Is this field curvature problem a natural product of trying to get a smaller primary lens down to an F5, or an issue specific to the SW102?