I use a 14mm ES eyepiece with an 8" f6 dob and the views are superb for DSOs. For planetary, would not (as mentioned above) recommend barlowing the 14mm as it will be very heavy/unwieldy. Suggest the Pentax 8.5mm xf, or Pentax xw 7/10, or Vixen lvws. The Delos are supposed to be rather good too. Lots of choices!
Andrew
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