8 Using optional accessories 8.1 Camera connection (only for trinocular version) Due to the trinocular tube, which can be optionally fitted for the OPM-1, OPN-1 and OPO-1 series, it is possible to connect microscope cameras to the device, in order to digitally record images or sequences of images of an object being observed. After the plastic cover has been removed from the camera adapter connector on the top of the microscope head, then a suitable adapter must be fitted. In general there are two C-mount adapters available for this (1x and 0.57x magnification, see Chapter 3 Features). After fitting one of these adapters it can be fixed with the fixing screw. A camera which has a C-mount thread is then screwed on top of the adapter. We recommend that you first adjust the field of view using the eyepieces on the device for the existing requirements, and then carry out the observation using the microscope camera (i.e. using the PC screen which is connected). To do this, the trinocular toggle rod on the righthand side of the microscope head must be pulled out. The light from the microscope lighting is deflected so that it is completely in the beam path for the camera, which causes a dark field of view in the eyepieces. This means that it is not possible to simultaneously observe by the eyepieces and PC screen. For C-mount adapters, which have their own integrated magnification, the image which is shown on the camera connected to the device can often have a different level of focus compared with the image on the eyepiece. In order to be able to bring both images into focus, the focus can be adjusted by those adapters.