Beseler Topcon B Booklet Product booklet

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BESELER T

f the many components that make up a 35mm
camera, the lens is most important. The small
1" x 1%" negative, which makes possible the

camera’s compact size, requires that all pictures be enlarged
many times, whether as prints or as projected images on a screen.
The lens, therefore, must be able to reproduce the finest details
and, in doing so, maintain original colors and tone values with
the highest degree of fidelity.

In recent years, the discovery of unusual optical qualities in cer-
tain rare earth minerals has led to spectacular improvements in
camera optics. Scientists of the Tokyo Optical Co. have been in
the forefront of this development. Their research resulted in the
new series of TOPCOR lenses with picture-taking qualities far
superior to those of existing optical formulae. TOPCOR lenses
render unsurpassed results in edge-to-edge sharpness and color
rendition, yielding transparencies and color negatives for
superb reproduction by every known printing process. Moreover,
they combine these qualities with much larger maximum open-
ings than previously possible. All internal and external lens sur-
faces are coated for maximum light transmission and improved
shadow detail. Testing virtually all standard single-lens reflex
lenses, a famous consumer research organization gave the

TOPCOR its highest rating of “Excellent” and endorsed it as
“one of the best lenses yet encountered.” No wonder TOPCOR
lenses have been received with instant enthusiasm by serious
photographers all over the world,

‘The superior performance of every TOPCOR lens is assured by
its precision helical focusing mount, machined to the closest
possible tolerances. The black finish of its exterior provides a
background that makes the light colored markings clearly visible
even under adverse light conditions, permits quicker, more accu-
rate settings and readings. All calibrations are located at the top
to give the photographer a comprehensive picture of distance,
opening and depth-of-field at a single glance. The man-sized,
knurled focusing ring turns throughout its entire range with
unusual smoothness. Like all the functions of the BESELER-
TOPCON, those of the TOPCOR lens impress the photographer
with the quiet competence of a superb precision instrument.

‘The family of TOPCOR lenses now comprises the five most
desired focal lengths, mastering every situation: 35mm, 58mm,
100mm, 135mm, and a magnificent 300mm {2.8 lens, the only
one of its kind . . . combining “big bertha” focal length and
tremendous light gathering power. Others are in preparation to
augment this wide choice of superb lenses,

TOPCOR LI