Big differance between a peep and a ghost ring.....nothing beats a ghost ring for close range open site work....fastest and most accurate open site availible....
A ghost ring and a peep sight work on two different (and one the same) visual principles.
The one similarity is that when one looks through a hole, small or a bit larger, it is a natural occurrence to thoughtlessly center the target in the hole. Target centered in the hole and front bead centered in the hole make for accurate shooting, right?
Now, a ghost ring makes use of this phenomenon and works well as a sighting device.
A peep sight does the same thing but also takes advantage of something known as the pinhole effect.
The pinhole effect is when light passes through a small opening, it bends, or diffracts. This blocks unfocused light rays, leaving only focused light to land on the retina. The result is a clearer image.
In effect, looking through a peep sight makes the image more crisp than one can achieve looking over a flat sight or a bigger ghost ring because the light bends all around the peep hole focusing the entire fields of view rather than just over the sight plane of an open sight. An open sight does this too but just over a very small layer of light rather than circumpherally inward.
Native Americans would look through a squeezed hand to clarify the view and enable themselves to see much farther and more clearly - try it yourself - with a little practice it works very well!
Also, as I learned being bored in class, if you take a pen or pencil and while you look at something across the room, slowly slide it up the bridge of your nose, you will see a thin horizon across the top of the pencil of perfectly clear and focused image.
It’s the same principle as the peep sight, the clenched hand or the pencil.
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