Blog Archives

Do I need to calibrate autofocus?

AF Microadjustment Values for ALL Canon cameras and lenses

We’re often asked whether there really is any point to calibrating your camera autofocus. Obviously we’re going to say a big, fat yes! otherwise FoCal wouldn’t exist, but I wanted to show a few charts to explain the sort of performance you’re likely to get “out the box”. When FoCal is used to calibrate or analyse a …


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Which are the most popular Nikon Cameras? – 2012 to 2014

Following on from the “which lenses are most popular” post, this post is about which are the most popular Nikon cameras among FoCal users from May 2012 through to October 2014. The Data Since 2012, users of FoCal have had the opportunity to upload their results data back to our servers.  We’re really excited about being able to …


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Nikon Top 10 Lenses by Month (2013-2014)

This page gives the month-by-month top 10 lists of lenses on Nikon cameras as shown by the user data uploads from Reikan FoCal users. Each month shows the top 10 lenses.  The Month Percentage column shows the percentage made up by this lens (of the total Nikon lenses used during this month).  The Percentage Change column shows the difference from the …


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Why can’t the 5Dmk3,1D X and Nikon cameras be completely automated?

When FoCal was first launched, it supported the Canon EOS 5D Mark II and 7D and could run a complete calibration with absolutely no user interaction.  We added further Canon cameras, and then when we added support for Nikon cameras we hit a stumbling block which meant that the software couldn’t control one particular setting.  With …


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Nikon Firmware Bug ( doesn’t affect ANY automatic FoCal Testing)

During the development of FoCal 1.9, we’ve found a bug in the firmware of all Nikon cameras we’ve tested with which will affect the procedure used for running the FoCal Manual Mode test and other situations where the AF Fine Tune value in the image metadata is of importance. **PLEASE NOTE THIS DOES NOT AFFECT …


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