Not being much of a visual observer atm....but I do have an ED80....for most visuals the eyepieces I would be looking at around the 6-10mm you will use most of the time....giving you a magnification of 60 -100X.
Anyhing smaller then a 6mm you may find uncomfortable eye relief unless you go for the Barlowed Eyepieces for example like the Naglers Pentax or Meade UW and others.
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