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Posted by Walter Hamler on September 26, 2001 15:24:19 UTC

f/6 is at the high end of a widefield scope and would give good viewing positions for a 48" tall person. The f/7 would be a sort of compromise, f/8 would be the next logical step. Focal length is getting long enough that higher useful powers are available, yet wide fields are possible with longer eyepieces. Tube length still managable for a 48" tall person and much more convenient for an adult sitting on a stool. A 6" f/8 telescope was for many years the atm standard and is still a good starting point. The biggest advantage is that it will be compact and portable enough that an opportunity to take it out even for a few minutes will not be a chore to otherwise discourage the thought!!

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