When you observe the microscope with the naked eye, the field of view gets rounded.
(We are using glass scales in increments of 0.5 mm as test samples.)
When this is shot with a camera, it becomes a 4: 3 rectangle with enlarger size.
Besides that, the field of view will change depend on the magnification of the camera connection (connector lens), the size of the image sensor of the camera, and so on. (It will also be a red field of view and a blue field of view in combination.)
You can express this with monitor magnification. (You can also calculate.)
■Camera connection part is C-mount
If the camera connection part on the microscope is C mount, the C mount part also has magnification.
If you do not specify microscope, it seems that a C mount adapter of equal magnification (1 times) is often attached.
Monitor magnification = magnification of objective lens × magnification of C mount × (diagonal length of monitor / diagonal length of camera sensor angel)
1 / 2.5 inch camera (diagonal length of camera sensor angel is 7 mm)
19 inch monitor (diagonal angel 470 mm),
C mount part (equal magnification),
Objective lens 10 times
<Magnification caculation>
10 times X 1 times X (470 mm / 7 mm) = 670 times
The field of view will be like the bottom picture.
Since the horizontal dimension of the 19 inch monitor is 370 mm. So, the image on the right spreads to the screen
<Measured magnification>
370 / 0.55 mm = 672 times
Magnification caculation (monitor magnification) and actual magnification are the same.
We need to reduce the magnification of C-mount in order to increase the field of view
We also offer equal size (standard equipment) and 0.5 times (option).
There are various magnifications when looking at other company’s catalogs.
■If you are connected to microscope by JIS len, the magnification can not be changed (equal magnification)
If you are connected a camera to this lens barrel, a relay lens is attached to the camera side. There is magnification in this relay lens.
Magnification calculation is as follows:
Monitor magnification = magnification of the objective lens × magnification of the connector lens × (diagonal length of monitor / diagonal length of camera sensor angle)
1 / 2.5 inch camera (image sensor diagonal 7 mm),
19 inch monitor (diagonal 470 mm)
Connector lens (0.45 times),
Objective lens 10 times
<Calculation magnification>
10 times X 0.45 times X (470 mm / 7 mm) = 302 times
Since the horizontal dimension of the 19 inch monitor is 370 mm. So, the picture on the right spreads to the screen then:
<Measured magnification>
370 / 1.2 mm = 308 times
Magnification caculation (based on magnification on monitor) and actual magnification are the same.
Our company has 0.45 times and 0.37 times connector lens available.
We’ll advise the suitable one to the customer according to the size of the image sensor of the camera.
