PinnedAndRecessed
member
- Joined
- Aug 10, 2004
- Messages
- 1,541
On an earlier thread someone stated that the rule to determine the largest scope lens size the eye can utilize is 7 = (28/4) for a four power scope.
Therefore for a four power scope the largest lens the eye can utilize is 28mm.
Does that mean if the scope is a 20 power it will be 20X7=140mm?
Or what is the maximum lens size the eye can utilize?
I know there's no rifle scope with a 140mm lens, but exactly how does the formula work?
Therefore for a four power scope the largest lens the eye can utilize is 28mm.
Does that mean if the scope is a 20 power it will be 20X7=140mm?
Or what is the maximum lens size the eye can utilize?
I know there's no rifle scope with a 140mm lens, but exactly how does the formula work?