2
Restrictions
1. The standard TV adapter is the U-TV1X-2 or the U-TV0.5XC-3.
The U-TV0.25xC or U-TV0.35xC (TV adapter with a magnification below 0.5X) and the U-TV0.5XC/GX-TV0.5XC-DP cannot
be used because of their optical performances.
2. When the DP20 is mounted on the rear port of the U-DPT or U-MPH, the image in the peripheral area will degrade due to
the optical performances of the port.
3. When using two intermediate attachments by stacking one on the other, the peripheral area may become dark or
obscured depending on the types of the observation tube and objective used.
4. Under fluorescent lamp illumination, the image may flicker.
5. When the DP20 is combined with a non-Olympus microscope or a commercially available C-mount lens, problems due
to optical adaptability such as shading may occur. Also when using a commercially available C-mount lens, make sure
that neither screw protrusion from the C-mount abutting section nor lens protrusion exceeds 4.5 mm.
6. When the aperture iris diaphragm is stopped down near the minimum aperture during observation of a low-contrast
specimen (nearly colorless and transparent) or high-reflectivity specimen (near mirror), spot flare may be noticeable.
7. When edge observation of a non-transparent subject is performed using the STM combination under transmitted light
illumination, flare may be noticeable due to the difference in brightness between the transmitted area (over-exposure) and
opaque area (under-exposure). In this case, the flare can be reduced by reducing the exposure by means of exposure
adjustment or by using manual exposure.
<< SMT6 combination details >>
Edge observation using the combination MM6C-VL + MM6-ETR and MM6-OB3X/5X/10X objective.
8. This system cannot photograph dark specimens in reflected light fluorescence or darkfield observation (a specimen that
required exposure of 1/2 sec. or more when the ISO is equivalent to 100).
9. If the specimen has a distribution unsuitable for center average metering, it is necessary to use spot metering or exposure
adjustment.
10. When image magnification with electronic zooming is used during focusing, the image may become noticeably rough
with certain specimens.
11. The frame rate for live image (15 fps) is possible when the exposure time is no more than 1/15 sec.
12. When the scale photographing function or measurement function is selected, the image capturing time may be longer
than usual.
13. The tracking of the auto white balance function is deteriorated when the specimen has little white region.
14. The measurement function (not including the scale display function) requires a display resolution of 1600 x 1200 with
UXGA or 800 x 600 with SVGA. The measurement of playback picture is possible only with a TIFF image that has been
photographed with the scale display ON. It is not possible with JPEG images.
The measurement results are superimposed on the image display, but not compiled into a file such as a text file.
15. The available Compact Flush (CF) file formats are FAT and FAT32. Other file formats such as NTFS are not compatible.
If the CF card you want to use is in a format other than FAT or FAT32, you need to format the CF card properly on the PC
before use.
16. The recommended recording medium is the Compact Flash (CF card Type I, up to 4 GB) by SanDisk or Lexar. (For the CF
card models we already confirmed operation, see page 11.)
Operating Environment
Temperature: 0° to 35°C (32° to 95°F). Humidity: 20% to 85% (without condensation).
Recommended display specifications
Full-color capable monitor, 800 x 600 or better. (The factory setting is 1600 x 1200.)
Compliance with the VESA DDC2B standard.
1
Conformity of the System
17. The DP20 picture downloading software/USB driver cannot be used in the camera control (including recording).
18. When connecting a PC to the DP20, connect the DP20 control box to the USB2.0 port of the PC directly. If a connection
through a USB hub is used, malfunction may occur.