nitehawkarchery.com

Look at the end of your nose. You will see a fuzzy border along its edge. This
fuzzy border is caused by light diffraction. Light passing near the edge of your
nose is bent away, diffracted, making the edge of your nose appear fuzzy.
Hold any object just in front of your nose and look at its edge. You will again
see this fuzziness. Look through your peep sight, you will also see a fuzziness
along the inside edge also. This is because all edges diffract light
and it it is this diffraction controls the size of your peep sight.

Diffraction controls the center of your peep.
If you shoot outdoors, where light is constantly changing, the following will help explain
some of your misses. Remember, the dimmer the light the greater
the effects of diffraction. These two figures show how changes
in light affect the center of your peephole. When the light on the
right side ofyour peephole is brighter than the light on the left side

Nite Hawk Peeps provide a clearer and
more accurate sight picture.
These pictures demonstrate the clarity of a Nite
Hawk peep compared to no peep at all. In other
words, a Nite Hawk peep will improve you eye's
ability to see. This extra clarity is the result of the
peep limiting the area your eye needs to focus on,
which allows your eye to focus more accurately.
Optometrists have known of this phenomenon for
decades. Allowing your eye to focus more acuately
and at the same time it eliminates the diffraction
which occurs in all other peeps, insures that your eyes
can never switch dominance and also extends your
shooting hours.

In these two figures the small arrows
show the direction light is diffracted or
bent. Light is bent perpendicular to the
edge of the peephole, and out and
away from your eye. Your eye will not
sense this light so the inside of the
peep appears fuzzy. When you sight
with a round-holed peep you are
sighting with diffraction. In low light

diffraction increases, so hunters must use larger peeps to provide extra space
for the diffraction. But, this does not eliminate diffraction or the problems
caused by diffraction. Read on and learn more.

Diffraction makes your eyes switch dominance.
With both eyes open, focus on a spot about ten feet away. Point at the spot with a finger.
Using the other hand, block your vision (dominant eye) with one of your fingers. Start
with your finger about a foot from your dominant eye. Slowly move your finger up and
down keeping your focus on the spot. When your finger impairs your dominant eye you
will notice you are no longer pointing at the spot. Instead you will be pointing to the left
or right of the spot. What happened? Your eyes switched dominance. The diffraction in a
round peephole does this same thing. And it happens without warning!

of your peephole, the diffraction will cause the center of your
peephole to appear off-center to the right. The opposite
happens when light is brighter to the left. As the light changes,
the diffraction changes, and the center of your peephole will
also change. Diffraction controls the location of the center of
your peephole. Remember, with a round holed peep you are
sighting with diffraction not your peep.

When diffraction blocks your peep, you will sight with your non-dominant eye, but the
arrow travels along the sightline of your dominant eye and you will either gut shoot your
animal or miss completely depending on the direction the animal is facing.

Light diffraction can be eliminated.
This drawing shows how diffraction can be eliminated. By
replacing the round peephole with two intersecting slots, a
peephole is created that has no edge. The intersecting slots
allow light to diffract within the slots but never within the
square hole. The light entering the slots diffracts
perpendicular to the edges of the slots and parallel to the
outside of the square hole. The result is a square hole that is
diffraction free and does not require extra space for
diffraction. Also, the square hole is always clear, and always
consistent in size and shape. Can you believe a smaller
square hole is clearer then a larger round hole? It is!

Hopefully by reading this page you have increased your understanding of this extremely
important piece of your archery equipment. Remembering what you have learned willhelp
you to understand why you sometimes miss what seem like simple shots.

The most important accessory on your bow is your peep sight, yet many archers have never
taken the time to try to learn how a peep sight works. This is your chance!