How to clarify the view through your target scope magnifying lens
For indoor target archers competing in classes that allow them, magnifying lenses can greatly improve your vision of the target and allow you to be more precise in aiming.
But don’t expect to simply pop a lens in your scope housing, look through it at the target and expect everything to be crystal clear. Think about what you have to do to check your arrows by looking through binoculars. They have a focus knob that you turn to clarify your view. An archery scope housing doesn’t have that knob.
When you look through your scope with a lens in it, it’s highly likely things are going to be blurry. Don’t worry. That’s normal.
The remedy varies from archer to archer. That’s understandable when you consider how much people’s eyesight varies from person to person.
It may be that you need a clarifying lens in your peep sight. If you’ve heard archers mention using a "clarifier," this is what they’re talking about.
To be able to add a clarifying lens to your peep, you have to be using a peep that accepts them, so make sure you’ve got such a peep. It will be threaded to receive the lens insert.
Depending on which peep system you use, there are multiple clarifiers to choose from. The best way to find out which lens might work is to try them all until you find one that makes the target clear. For scopes with 2-5-power magnification, look for clarifiers with the lower numbers to work best. Lenses with higher magnification usually work best with clarifiers at the higher end of the spectrum.
Here's a great reference chart from Specialty Archery to keep in mind.
Generally, if the target is blurry, but the scope is clear, then try a stronger clarifier - one with a higher number. If the target is clear, but the aiming dot on your scope is blurred, try a weaker clarifier.
While you are doing this, if you find one clarifier is almost perfect, you can try sliding your scope in toward your eye or away from it, assuming your sight bar has a dovetail mount which allows for this adjustment.
If you just can’t find a clarifier that works properly – a common occurrence for people who wear eye glasses – you can try reducing the size of your peep aperture. Shrinking the aperture reduces the stream of light that reaches your eye, increasing depth of field of your vision, which brings objects into focus.
Archery peeps generally come in sizes ranging from 1/32” to 5/16”.
Again, as you’re experimenting with peep sizes, try sliding your sight bar in and out to fix minor focus issues.
If reducing the peep size alone or adding a clarifier alone doesn’t work, you can also try different clarifiers with different sized apertures.
In most cases, a remedy can be found somewhere within this experimentation. Once you’ve found a system that makes the target clear for you, you’re ready to start shooting.