The human eye and the equipment chain (4/4) Conclusions The maximal achievable pixel resolution for the FX format is limited by the available lens technology which allows about a 20Mpixel picture on the sensor. This is higher than all common (discussed above) reproduction types to get the impression of a sharp picture. The A4 Photo needs about 9Mpixels limited by the human eye angle resolution. This amount is only necessary for a very close viewing distance where you may like to see some sectional details. For a normal full size view 3 Mpixels would be enough. What's said about the A4 picture is also valid for all the others discussed combinations. As you sit maybe a little closer to your computer screen and also like to see sectional details a resolution above 3 Mpixels can make sense in line with the new UHD format which offers 8 Mpixels. This represents approximate the fine print standard of 300 dpi. TV watching with today’s Full HD format with 2 Mpixels is quite optimal. It will be very difficult to see any difference between the Full HD and the 4x higher UHD format as you can't sit that close to really capitalize on it.