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Old 05-06-2008, 10:23 PM
§AB
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Join Date: Aug 2007
Location: New Iceland
Posts: 761
Quote:
Originally Posted by allan gould View Post
Is there much difference in apparent magnification between the 8mm LVW and the 5mm LVW? Been thinking of getting the 5mm LVW.
Thanks Allan
generally, the longer the focal length of your scope, the bigger the mag difference is between any 2 given eyepiece F/Ls.

for example:

on a 600mm FL scope, the 5 and 8mm produce 120x and 75x respectively (diff = 45x) ,

on a 1250mm FL scope, the values are 250x and 156x (diff = 94x).

on a 2000mm FL scope, the values are 400x and 250x (diff = 150x).

overall the difference between 5 and 8mm is significant enough at all focal lengths to warrant having both.
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