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Wide Angle Eyepieces on f/10 refractor?

Started by Lee_S, 09/09/2005 07:38AM
Posted 09/09/2005 07:38AM Opening Post
Do wide-angle eyepieces that advertise 66-degree and 70-degree fields of view work on scopes with longer focal lengths? Or are they specifically for wide-field scopes?
My telescope is a 70mm refractor with 700mm f.l.

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I have several telescopes, but none are semi-APO, APO, or in anyway valuable.
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Posted 09/09/2005 08:55AM #1
Do wide-angle eyepieces that advertise 66-degree and 70-degree fields of view work on scopes with longer focal lengths? Or are they specifically for wide-field scopes?
My telescope is a 70mm refractor with 700mm f.l.
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Actually the less expensive widefield eyepieces often work significantly better at F/10 than the do in at F/5 in that they will be sharper near the edge in the slower scope.

F/4 etc scopes produce a steep light cone and it takes fancy eyepieces like Naglers to provide a clean image.

At F10 basic eyepieces work very nicely.

jon
Posted 09/10/2005 10:36AM #2
Cool! I may have to try one of the wide angles once I finish my power mad phase! 8) I had good results Lunar observing with an 8mm Plossl and want to try 5mm and 6mm Plossls next. Thanks.

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I have several telescopes, but none are semi-APO, APO, or in anyway valuable.
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Posted 09/10/2005 02:00PM #3
HI LEE,I HAVE A POLAREX 4" REFRACTOR IT OPERATES AT F/15.I'VE RECENTLY PURCHASED AN EYEPIECE MADE BY KOKASHI-KOKI IN JAPAN. THIS COMPANY MAKE 4 EYEPIECES-30MM-2"
20MM,16MM,13MM-1.25". I HAVE THE 16MM IN MY SCOPE THAT GIVES ME 92X,THEY ALL HAVE A 84 DEGREE A.F.O.V.ITS LIKE LOOKING THROUGH A HUGE PORTAL OUT INTO SPACE.I'M NOT SURE WHAT NAME THEY ARE UNDER IN THE U.S. BUT ANY OF THE LARGER DEALERS OR ONE OF THE ASTROMART MEMBERS MIGHT BE ABLE TO HELP. CHEERS FROM OZ. JOHN smile