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| Coupler Mount Type for Body | Fastening Screw |
| Coupler Magnification | 2X |
| For Camera Sensor Size | Under 2/3 in. |
| Net Weight | 0.025kg (0.055lbs) |
| Applied Field | Mitutoyo-378-505 (VMU-V), Mitutoyo-378-506 (VMU-H), Mitutoyo-378-513 (VMU-LB), Mitutoyo-378-514 (VMU-L4B) |
Technical Info
| Coupler or camera adapter, is also called photo eyepiece, CCTV adapter, CCD adapter, camera adapter, digital camera adapter, and camera adapter etc. Coupler is an optical imaging lens that uses mechanical adapter device to connect the camera to the microscope, and project the image onto the camera's target through the adapter. Coupler/C-mount adapters have different magnifications to capture images of different magnifications and field of view. In optical imaging, optical parameters such as chromatic aberration, distortion, and field curvature are also to be considered to ensure image quality. At the same time, for some other couple/C-mount adapters, factors such as the position and angle of the camera are also considered to suit the needs of the observational environment. |
| Coupler/C-mount adapter is an adapter commonly used for connection between the C-adapter camera (industrial camera) and a microscope. |
| Coupler magnification refers to the line field magnification of the coupler/C-mount-adapter. With different magnifications of the adapter lens, images of different magnifications and fields of view can be obtained. The size of the image field of view is related to the sensor size and the coupler/C-mount-adapter magnification. Camera image field of view (mm) = sensor diagonal / coupler/C-mount-adapter magnification. For example: 1/2 inch sensor size, 0.5X coupler/C-mount-adapter coupler, field of view FOV (mm) = 8mm / 0.5 = 16mm. The field of view number of the microscope 10X eyepiece is usually designed to be 18, 20, 22, 23mm, less than 1 inch (25.4mm). Since most commonly used camera sensor sizes are 1/3 and 1/2 inches, this makes the image field of view on the display always smaller than the field of view of the eyepiece for observation, and the visual perception becomes inconsistent when simultaneously viewed on both the eyepiece and the display. If it is changed to a 0.5X coupler/C-mount-adapter, the microscope image magnification is reduced by 1/2 and the field of view is doubled, then the image captured by the camera will be close to the range observed in the eyepiece. Some adapters are designed without a lens, and their optical magnification is considered 1X. |
| For the size of the lens field of view of the coupler/C-mount-adapter, in the design process, the size of the camera sensor imaging target should be considered. When the field of view of the lens is smaller than the target plane of the camera, “black border” and “dark corner” will appear. The general microscope coupler/C-mount adapters are generally designed for the 1/2" camera targets. When a camera of 2/3 or larger target is used, the “dark corner” phenomenon will appear in the field of view. Especially, at present, DSLR cameras generally use large target plane design (1 inch full field of view), when used for microscopic photographing, the general DSLR camera coupler/C-mount adapter will have “black border”. Generally, the “dark corner” that appears on the field of view is often that the center of the microscope and the camera are not aligned. Adjust the position of the screw on the camera adapter, or turn the camera adapter to adjust or change the effect. |
