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www.vortexoptics.com

8

www.vortexoptics.com

Focusing the Binocular.

Choose an object that is about 20 yards away from you 
and follow this two-step process to properly adjust 
the focus. Be sure to stay in the same spot until you 
have adjusted both the center focus and diopter.  

1. Adjust the center focus 

– Start by closing your right 

eye or covering the right objective lens with your hand. 
Focus your left eye on the object 
and adjust the center focus wheel 
until the image is in focus. Leave 
the center focus in this position 
as you adjust 
the diopter. 

2. Adjust the diopter 

– Start by closing your left eye 

or covering the left objective lens with your hand. Look 

through your right eye and adjust 
the diopter (ring found on the 
right eyepiece) until the object 
is in focus. Make note of this 
diopter setting in case you need 
to set it again.

From this point on, you will only need to use the center focus dial.

Maintain the optical brilliance of the Diamondback by 
keeping the lens surfaces free of dirt, oils, and dust.

Protect Lenses While Out in the Field.

Caring for the Lenses

Make use of the rainguard and tethered objective lens 
covers to protect the lenses when not viewing. Store the 
Diamondback in its custom-molded carry case.

Keep Lenses Clean.

Along with normal use comes the need to clean the 
binocular lenses. Follow these guidelines for cleaning: 

1. Remove any dust or grit from lenses before 
wiping. 

Use a can of pressurized air or soft camel hair 

brush (acrylic optical brushes also work well).

2. Clear lenses of smudges, fingerprints, or eyelash 
oil. 

Fog the lenses with your own breath and wipe 

with the non-abrasive lens cloth included with the 
Diamondback binocular.

Cleaning fluid and optical paper can also be used. However, you 
should never use facial tissue, heavy cotton, or flannel clothing 
on lenses—these materials can scratch the lens surfaces.

Other cleaning options:

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