Abstract: The present invention provides a viewing scope adapted to be mounted on a device, such as a rifle or camera. The viewing scope may include a body module, an objective module, a test module, and a control module. The test module may be configured to test the performance of the scope. The control module may include a series of user inputs that can be accessed and activated by a user without requiring the user to move his or her visual focus from the scope.

Abstract: In a first embodiment, the present invention provides a modular viewing scope configured to be attached to a device such as a firearm or camera. The modular viewing scope may include a plurality of modular units wherein one or more of the units are selected from the group consisting of: a body module, an objective module, an eyepiece module, a control module, and a test module. Moreover, each of the modular units may be adapted to be replaced and/or upgraded as desired by a user without requiring removal of the viewing scope from the device.