Vortex Optics SPITFIRE 8.5X32 BINOCULAR - Manual (Page 3)

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Attach the padded neckstrap to the binocular in
three simple steps. Begin with the right barrel of the
binocular and repeat the process for the left barrel.
The Neckstrap
1. Push a few inches of the
strap through the neckstrap
attachment point on the
binocular.
2. Loop the strap over the
attachment point, then
thread the strap through
the strap buckle.
3. Secure the end of the
strap by slipping it
through the strap loop.
IPD
The eyecups on the Spitfire binocular twist up and
down so any viewer can take advantage of the long eye
relief and enjoy comfortable, full-field viewing.
With eyeglasses or sunglasses,
retract the eyecups.
Without eyeglasses or sunglasses,
extend the eyecups.
Adjusting the Eyecups.
The twist-up eyecups are built on a solid frame and
covered with rubber.
Adjusting the Interpupillary Distance.
The interpupillary distance (IPD) is the distance
between the centers of the left and right eye pupils.
Match the IPD of your eyes
to that of the binocular by
rotating the binocular
barrels inward or outward
until you see a single image
that is free of shading.
Customizing the Spitfire