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PR-680/680L User Manual
15
S
TANDARD
O
BJECTIVE
L
ENS
The standard objective lens for the PR-680/680L is the MS-75 - a 75mm f/2.8 MacroSpectar
®
that focuses from
1:4 magnification to infinity. This objective lens enables the PR-680/680L to perform a variety of measurements
including: luminance, radiance, spectral radiance, chromaticity, correlated color temperature (CCT), Color
Rendering Index (CRI), dominant wavelength, etc.
For applications other than radiance or luminance the PR-
680/680L can be supplied with optical accessories such as a cosine receptor for irradiance / illuminance, LR-127
LED Analyzer for testing LED's for CIE 127 conformity, fiber probe for remote non-line-of-sight luminance
testing, and a series of magnification lens for small spot size analysis. Refer to Optional Accessory section for
more information on all available optical accessories.
FIGURE 20 - MS-75 OBJECTIVE LENS
I
NSTALLING AND
/R
EMOVING THE
S
TANDARD
L
ENS
The standard objective lens is installed by aligning the thread from the OBJECTIVE
lens with the instrument’s
lens mount and rotating clockwise while grasping the rubber ring toward the rear of the lens (see
). The
thread should offer minimum resistance during installation.
Full details including spot size versus working distance for all available lenses for the PR-680/680L can be found
in the
Specifications
section.
Uninstall Lens
Install Lens
Lens focusing ring
Grasp here to install or
uninstall lens.