The amount of magnification depends on the focal length of the eyepiece. Games are viewed through a binocular eyepiece and controlled using an affixed gamepad. The use of a compound objective/eyepiece combination allows for much higher magnification. True FOV is the observable world observed though an ocular eyepiece inserted into a telescope. It uses a convex lens as the eyepiece instead of Galileo's concave one. Microscopes were first developed with just two lenses&colon; an objective lens and an eyepiece. It can easily be mistaken for a comet in the eyepiece of a telescope. In the eyepiece of a large telescope, its southeastern dust lane becomes visible. The coincidence rangefinder uses a single eyepiece. The binoculars are revealed to have two spikes emerging out of the eyepiece. The image forming rays continue towards the low powered telescopic eyepiece. It looks similar to a coincidence rangefinder, which has only one eyepiece. The maximum is limited by the focal length of the eyepiece. Laser alignment is much easier than aligning through using the eyepiece. The dial sight had all scales internal, illuminated and viewed through a single eyepiece.