of optical zoom, digital zoom, and software to get improved results when zooming in further than the lens’ physical capabilities. Smartphones with optical zoom have lenses with 3× or 5× magnification. Trying to zoom in further than this limit may result in loss of quality as the camera switches to digital zoom, though hybrid zoom may mitigate this. Many cameras, including mobile phone cameras, also employ lossless digital zoom for video recording by using the spare resolution of the image sensor for cropping by taking advantage of used video frame resolutions often being significantly below the available resolution of the image sensors. This means that, for example, if implemented correctly by the camera hardware and software, a 2160p image sensor would enable up to 2× lossless digital zoom for 1080p video recording, 3× for 720p video, and 4.5× for 480p video by using image sensor cropping. The terms among camera and image sensor manufacturers are "Smart Zoom" (Sony), "Safe Zoom" (Canon), "Sensor Crop" (Cisco) and "Intelligent Zoom" (Panasonic and others). There are also cameras with digital zoom functions as high as 7.2× and Smart Zoom with approximately 30× total zoom (optical zoom 20× and digital zoom 1.5×) for 7MP from 16MP total resolution, and also 144× total zoom (optical zoom 20× and digital zoom 7.2×) for VGA 640x480. Aesthetic Photographers can purposefully employ digital zoom for the characteristic low-fidelity appearance of the images it produces. The appearance of poor quality in photographs can be intentionally used to imply carelessness on the part of the photographer and a sense of candidness in the photograph. See also Image scaling Teleside converter - a secondary lens made for fixed lenses that increases the focal length, uses as a filter Zoom lens References Digital photography