Zeiss 000000-1080-349, Instructions For Use Manual

Page: 183 / 278

Version 7.0
G-30-1781-en
Page 183
S100 / OPMI pico Operation
A target value in a range from 50% to 70% usually provides the best ex-
posure results.
Low light This mode has the same function as the "Automatic" mode, but exposure
times greater than 1/50 (60) s are allowed, which can result in blurred
movements.
Manual
In this mode you can set the exposure time under "Exposure time". The
setting range extends from 1/6 to 1/10000.
– Increments for PAL: 1/10000, 1/4000, 1/2000, 1/1000, 1/500,
1/250, 1/100, 1/50, 1/25, 1/12 and 1/6
– Increments for NTSC: 1/10000, 1/4000, 1/2000, 1/1000, 1/500,
1/250, 1/120, 1/60, 1/30, 1/15 and 1/8
2 Lightmeter
In "Lightmeter" you can choose between three types of exposure meas-
urement: Small spot, large spot or integral.
The lightmeter function is active only when the brightness is to set "Auto-
matic" or "Little light".
Small spot The exposure is measured in a very small area in the image center. This
measurement is suitable for work in narrow channels when an extremely
small illuminated-field diameter is being used.
Large spot
The exposure is measured in an area in the image center. This measure-
ment is ideal for working with an eclipsed surgical field edge (resulting
from a reduced illuminated-field diameter).
Integral The exposure is measured and averaged across the full video image. This
measurement is recommended for surgical fields that are fully and evenly
lit.
If the object of interest to you is not in the image center, in most cases the
"Small spot" setting will not deliver the desired exposure result. Select ei-
ther a larger area ("Integral" or "Large spot") or manual exposure.
Fig. 80: Types of
exposure measurement
Integral
Large spot
Small spot