I have an F60 and a recently purchased used F80. Both are excellent finders and have no trouble coming to focus with any of my eyepieces. They are especially good with my ES 20 68deg eyepiece and can easily perform as rich field grab and go.
As an aside... Last week I dropped the F60... And despite two minor cracks on the very edge of the objective it still works well! One note though, the supplied eyepiece isn't so hot and gets pretty soft towards the outer edge.
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