What C-mount is recommended to attach a Dage-MTI HD camera to my microscope?

What C-mount is recommended to attach a Dage-MTI HD camera to my microscope?

We recommend a 0.35x (no more than a 0.4x) to use with your microscope. In those situations where a higher magnification c-mount is required by the microscope configuration, we recommend an optical coupler between the camera and the c-mount to reduce the magnification back to 0.35x – 0.4x