The Field Dimensions are the extent and outline of the field as you see it, usually measured in terms of the maximum height and width of the field (in centimeters or inches).
Generally, most dentists and surgeons
want to have the largest field of view possible.
The greater the magnification factor, the smaller the Field Dimensions (and the larger the Magnification
Scotoma, too!)
You can measure the Field Dimensions
for any telescope system quite easily:
Hold a clipboard with a blank piece of paper (graph paper is best) perpendicular to your line of sight through the magnifiers and at approximately the middle of the depth of field for the magnifier.
Trace the outline of the magnified field. Measure the height and width of the field.
Compare these measurements with the Field Dimensions for other telescope systems.
Note: The apparent
size of the field of view will vary greatly depending upon the distance between your eye
and the telescope ocular itself. This is especially relevant when you are evaluating
headband-mounted flip-up telescopes. Generally, the further the telescope from your eye,
the smaller the Field Dimensions will be.
Remember: In general, you will want to have
the largest field of view possible.
If you have comments or suggestions,
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