DONEGAN OPTICAL COMPANY - OptiVISOR Model #DA-3
(1.75x magnification at 14")
These are the same
headband magnifiers that are used in the medical profession,
by professional jewelers and others that require high quality, distortion
free magnification.
The Donegan OptiVISOR is a hands-free, headband binocular magnifier that
has optical glass lenses that are ground and polished into prismatic
lenses for quality and clarity, and is available in multiple dioptric
strengths (indicated by the number in the model) which provide specific
magnification power (X) at specific focal lengths, or distance from
object.
This magnifier enhances the size and resolution of an object or
image, and is commonly used for a variety of applications such as
jewelry-making, watch- making, needlework, artwork, electronic
inspection, book-reading, print inspection, and stamp-collecting.
The OptiVISOR magnifier features replaceable binocular lenses that have
beveled edges that are mounted in an interchangeable plastic frame. An
adjustable headband with padded leather comfort band conforms to a
variety of head sizes and provides comfort for hours of continuous use.
It can be worn over prescription or safety eyeglasses. A durable,
plastic visor tips up above the forehead when not in use. Spring-loaded
pivot screws hold the headband in a raised or a forward-facing position.
The magnifier weighs approx. 180gms.
Optical Glass Prismatic Lense - Ground and polished
to precision optical standards - bevel edged and mounted in
interchangeable plastic frame.- It Tilts - Adjustable pivots allow
the visor to be tilted out of the way when not needed and at your
fingertips when you need magnification.
- Adjustable Headband - Conforms to
fit all head sizes - fabricated from a special blend lightweight
material - comfortable when worn for long periods of time.
- High Impact Visor - Provides a tough, durable, always new appearance.
- Genuine Leather Comfort Band - Padded with orthopedic felt adds to comfort.
please note:
For best results, choose the lens the
with the lowest power necessary to accomplish your task. This is because
the greater the magnification you use, the shorter your focal length
will be and the smaller your field of view will be. Choosing the minimal
magnification ensures the best possible field of view and focal length
as you work
Not to be confused with the model LX-5 which is cheaper as it has ground plastic lenses.
Also, beware of the cheap Chinese made imitation Optivisor (which also have plastic lenses)