SM-4 Series Stereo Microscope
AmScope Proprietary
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Barlow Lens
Barlow lenses screw onto the objective lens housing to
either amplify or reduce the total magnification of the
objective lens.
The SM microscope has two options available--the 0.5x and
the 2.0x. The 0.5x will cut magnification in half down to a
minimum of 3.5x (and double working distance to
approximately 8 inches or 203mm), while the 2.0x will
double your magnification (but half the working distance,
down to 3/32 of an inch or 2.4mm).
Continuous Zoom/Fixed Power
AmScope‟s objective lenses have either fixed power or continuous zoom
objectives.
Continuous zoom microscope
head's have a dial to move
through an entire range of zoom
such as 0.7x-4.5x. To move
through the magnification range
you would adjust the dial
accordingly.
Fixed power objective lenses are
pre-set at certain levels.
Magnification is changed by twisting
the objective lens housing.
Fixed power objective lenses are
more economically priced than
continuous zoom microscopes and
produce specific magnifications.
