the image in the waist-level finder is reversed 'left to right' which can make framing a photograph difficult, especially for an inexperienced user or with a moving subject. with high-quality tlrs like the rolleiflex and the mamiya c220/c330 the waist-level finder can be replaced by an eye-level finder, using a roof pentaprism or pentamirror to correct the image while making it viewable through an eyepiece at the rear of the camera.