High-resolution C-Mount coupler system enables video adaptation for most major microscopes. Parfocal adjustment allows for the simultaneous focus of both scope eyepieces and video monitor via a simple twist. The main body/coupler contains a relay lens to project the microscope’s intermediate image onto the camera’s sensor. Several magnifications are available for achieving the desired field of view for many sensor formats (1/3", ½", 2/3", 1"). Different bottom clamps allow easy, versatile adaptation between coupler and microscope. The 1.0X coupler is designed to offer higher resolution associated with digital cameras.