AF tunning what actually happens?????

Started Jan 24, 2014 | Discussions thread
Leonard Shepherd
Leonard Shepherd Forum Pro • Posts: 14,285
Re: To understand better - or maybe worse

Horshack wrot

To understand this better, first go to this page and play with the java applet to get a sense on how phase detection works by moving the "lens position" slider around.

To understand better or worse the link is in part less than complete.

The link seems to ignore the AF system, depending on the type of subject, can project detail on the aF sensor which confuses it and causes a wrong reading.

This potential limitation is what the guidance on Page 100 of the D800 instructions, page 72 for the D7100 or in the instructions for many Nikon wide angle lenses deals with.

Very few cameras, tested with sensible AF targets to a good standard, seem to need the amounts of fine tune suggested on this forum and; any new cameras that do are obviously defective and should be exchanged..

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Leonard Shepherd
Great images are often of good subjects.
If they are great images does what lens, body or technique was used matter more than the skill of the photographer?

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