Chapter 7 Tips on Photographing
50
Photographing
Basics of DS-L4
7.3
Calculating the Display Magnification for Microscopic Observation
Pixel sizes of image pickup device on microscope cameras
The table below shows the pixel size (the maximum number of pixels stored) of image pickup device and the
effective area (area for the effective number of pixels stored) of each camera.
Camera
Pixel size (m) Recorded pixel count Effective area (mm)
Width Height Width Height Width Height Diagonal
DS-Fi3 2.4 2.4 2880 2048 6.91 4.92 8.48
Use the following formula for calculating the magnification of the subject on the display panel.
Magnification on the display panel
Optical magnification (objective lens magnification x relay lens magnification) x
height of display
*1
Height of effective area for image pickup device
*1: The dot pitch of the LCD panel of the DS-L4 is 0.1128 mm/pixel. In normal cases (if no external display is connected),
the number of vertical pixels is 1,180. Therefore, the height of the display area is 0.1128 x 1,180 = 133.1 mm. If an
external display is connected, the number of vertical pixels is 1,060. Therefore, the height of the display area is
0.1128 x 1,060 = 119.6 mm.
Camera
Magnification of
optical device
(example)
Magnification of the subject on the DS-L4 display panel
DS-Fi3
Objective: 40x
Relay lens: 0.55x
(Electronic zoom: 1x)
In normal cases:
40 x 0.55 x 133.1 mm / 4.92 mm = approximately 600
If an external display is connected:
40 x 0.55 x 119.6 mm / 4.92 mm = approximately 530
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