hi again all.
thanks for the succinct and enlightening explanations, I now understand enough to get me in REAL trouble.
my summary of the below answers.
option 1. I can spend merely copious quantities of money getting a particular FOV.
option 2. I can spend ENORMOUS amounts of money for a particular FOV.
if I want the "wide screen hi definition" view of a particular amount of sky, I must pick option 2.
goodbye bank balance...
Rider
Quote:
Originally Posted by ngcles
Hi Rider,
Rider wrote:
"I think they will both have the same area of stars in frame, so would duplicate each other." (emphasis added)
The calculations by Dennis are spot on -- but only tell half the story. To answer the second part of your question as reproduced.
The view through the 43 deg AFOV eyepiece while about the same size will be much less aesthetically pleasing, will have a slightly brighter background sky, the view will seem much more "compressed" and because of the narrowness of the AFOV, will seem a bit like looking down a sewer pipe.
The 82 deg AFOV ep while showing essentially the same slice of sky will be much more like looking out of a porthole, show a more contrasty view and more detail will be more easily discerned due to the higher magnification -- assuming it is a high quality occular -- which an 82 deg AFOV usually implies! All round much nicer!
Best,
Les D
Contributing Editor AS&T
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