Abstract: A battery holder is provided for supplying electrical power to a battery operated electrical device. The battery holder includes a main fixing frame, a spare fixing frame and a battery cover. The main fixing frame defines a first opening and a first battery-receiving cavity for receiving at least one main battery. The spare fixing frame is assembled onto the main fixing frame for closing the first opening of the main fixing frame. The spare fixing frame defines a second opening and a second battery-receiving cavity for receiving at least one spare battery that can be removed from the second battery-receiving cavity to the first battery-receiving cavity for replacing the main battery. A battery cover is assembled onto the spare fixing frame for closing the second opening of the spare fixing frame.

Abstract: Provided is a sighting apparatus capable of displaying a value of magnification. The sighting apparatus includes a magnification generation module, a controller and a display unit. The magnification generation module includes a magnification pattern, which contains multiple values of magnification, and a sensing unit. When the magnification pattern is rotated, the sensing unit detects one of the magnification values from the magnification pattern. The magnification generation module generates a magnification signal corresponding to the magnification value. The controller functions to transform the magnification signal and the display unit displays the value of magnification corresponding to the magnification signal.

Abstract: The electronic sight includes a base, an optical window, a point light source, a photomask and a low-reflective layer. The optical window is disposed on a first end of the base. The point light source, disposed on a second end of the base, provides a lightbeam. The photomask is disposed between the point light source and the optical window, and the low-reflective layer is formed thereon. The lightbeam passes through the photomask along a first direction, hits the optical window, and is reflected toward a second direction by the optical window. The method for manufacturing the electronic sight includes: providing a base; providing an optical window disposed on a first end of the base; providing a point light source disposed on a second end of the base; providing a photomask; forming a low-reflective layer on the photomask; and positioning the photomask between the point light source and the optical window.