Using a camera with an optical inatrument often requires matching the output of the instrument with the camera image sensor. Typically, in microscopes and telescopes, the required adapter changes the size of a real image from the instrument to a size that allows the camera sensor to capture the center of the image. How much of the image is captured depends on the magnification of the adapter. Additional information on how to select the magnification of an adapter can be found here. In other instruments, the coupling requirement mayt be more complex. Here we offer an assortment of adapters for a variety of optical instruments.