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== magnification and resolution == | == magnification and resolution == | ||
To find out how big the surface is we are looking at, we are capturing a piece of a screen/display and count the pixels. We tried an [[wikipedia:iPod Touch|iPod Touch]] which has a widescreen with the following specs: | To find out how big the surface is we are looking at, we are capturing a piece of a screen/display and count the pixels. We tried an [[wikipedia:iPod Touch#Specifications|iPod Touch 4th generation]] which has a widescreen with the following specs: | ||
* resolution is 960 x 640 pixels | * resolution is 960 x 640 pixels | ||
* physical size is 75 x 50 mm | * physical size is 75 x 50 mm | ||