All modern digital microscope cameras are equipped with a female C-Mount thread and will, therefore, fit onto a C-Mount adapter which has a male C-Mount thread. C-Mount adapters are manufacturer-specific and, in Ceti’s case, model-specific. Please check that the C-Mount adapter you have selected matches the make and model of microscope you wish to mount the camera on. For example, you cannot to use an Olympus C-Mount adapter on a Ceti microscope or vice versa.
Some C-Mount adapters have lenses in them so that the user sees a similar magnification to the one seen through the 10x eyepieces. A 1x C-Mount adapter has no lenses built into it so it means the user sees a narrower field of view than that viewed through the eyepieces.