The 25 Best Online Colleges For 2016-2017. 7.1 million Americans took for-credit classes online in 2013, with a large portion of these students completing their entire degree online. Online education is relatively new, but now itâs mainstream. There are more online colleges than ever, increasing competition, offerings, and overall value for students.
An electronic viewfinder (EVF) is a camera viewfinder where the image captured by the lens is projected electronically onto a miniature display. The image on this display is used to assist in aiming the camera at the scene to be photographed.
A digital single-lens reflex camera (also called a digital SLR or DSLR) is a digital camera combining the optics and the mechanisms of a single-lens reflex camera with a digital imaging sensor, as opposed to photographic film. The reflex design scheme is the primary difference between a DSLR and other digital cameras.In the reflex design, light travels through the lens, then to a mirror that alternates to send the image to either the viewfinder or the image sensor.he alternative would be to have a viewfinder with its own lens, hence the term single lens for this design. By using only one lens, the viewfinder of a DSLR presents an image that will not perceptibly differ from what is captured by the camera's sensor.