1.0 to 1.78 or 16:9 – The 16:9 aspect ratio (aka. 1.78:1 or “HDTV” High Definition Television) was developed by SMPTE as being the geometric mean of the full range of US and European standard aspect ratios at the time. The HDTV format was determined to accommodate high definition performance within the most optimal results in visual perception. Today, it is the most widely used format in television and gaming design. As of 2009, 16:9 is also the most common format in stand-alone monitors. Finding either a residential or even commercial projector in a 16:9 native format is not only easy but likely on today’s projector market.