I read with interest your One-eyed Users Manual earlier this year and in it you mentioned that wide-field eye pieces can offer as much as 40% more field of view than conventional eyepieces of the same power and in some cases nearly 100% more field than a zoom on the same power. I was wondering if you could give me an example of a manufacturer/model in each of these cases, if possible.
wide angle vs zoom eyepieces
Here are several examples that show a manufacturer’s 20x wide angle eyepiece vs their zoom eyepiece set at 20x when used in the same scope.
In a Leica 77mm Televid
Leica 20x WA, 197 ft/1000 yds
Leica zoom at 20x, 100 ft/1000 yds
In a Swarovski 80HD
Swarovski 20xWA, 180 ft /1000 yds
Swarovski zoom at 20x, 108 ft
In a Kowa 663
Kowa 20xWA, 173 ft /1000 yds
Kowa zoom at 20x, 89 ft
In addition, the fixed power eyepieces are generally regarded as being just a little sharper, although the difference is very small in eyepieces of this quality, In cheaper scopes, the difference in image quality is much more obvious.
Hope this helps. Please let me know if you have more questions.