Well, if you insist on WF, then a CCD will be expensive and a cooled DSLR is a viable alternative, with a LOT of effort ("easier" is a myth IMO, for a given quality pic).
Swapping clip-in filters is a pain too.
S/H St8/10s etc pop up occassionally, but they are relitively low res.
Focus with Focusmax, once set up on an autofocuser, is in the order of 20 secs.
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