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  1. My Fuji xT-1 has a scale showing the dof and focal distance viewable in the LCD and view finder which is very useful to determine hyperfocal distance. By adjusting manual focus twist till the right end of the blue (focus range) band touches infinity. The focus distance, shown in white, is your hyperfocal distance. An iPhone app Tack Sharp, gives the hyperfocal distance for an APS-C sensor, given the focal length and aperture. The two, TS and Fuji, disagree considerably. At 18 mm focal length, f/16, Fuji says hyperfocal about 14 ft, min focus about 7 ft., TS says (for 17mm - doesn’t do 18) hyperfocal distance is 3.2 ft., near focus, 1.5 ft. Why? After contacting Rico Pfirstinger, author of a book on the XT-1, I now know why they differ. Tack Sharp by default uses a 19 micron CoC for the APS_C sensor, Fuji (according to Rico) uses 5 micron CoC for their camera calculation. Tack sharp lets you, in the info panel, adjust the COC. Set it to 5 micron and the Tack Sharp answer agrees a lot better with Fuji. I guess this means unless you need the precision of focus Fuji is trying to achieve don't believe the blue range of focus band. Another iPhone app, Lens-Lab agrees well with Tack Sharp. A Wikipedia article uses 19 micron for the CoC of a APS-C (Nikon) sensor. So what does this all mean? Here is the Tack Sharp for 5 micron CoC and for 19 micron
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