FINE-TUNING YOUR AF AIN'T LIKE DUSTIN' CROPS, BOY!

Time to reactivate the blog. It's something that scratches an itch but sometimes infrequently, so apologies for the terrible lack of posts in recent months. Having been added to several lists of Bloggers by Tweeters recently, I guess it's best if I do something to put that right...


A technical post, then, first off.

Something that I've recently worked on, with very positive results, is making sure that the Autofocus on my pair of D3s bodies and my D4 is working as well as it should.

The D4 AF Fine Tune, within the Set Up menu. I found with all my lenses that this body likes to back-focus (i.e. sharp focus is actually behind the subject) quite a bit, so all lenses have individual adjustment to make them
focus in front of where the AF system wants at its default, or they use the body default I set up of -4.

ALL mechanical devices are built to tolerances. That is, "10mm" may be between 9.99mm and 10.01mm (for example) and the machinery should still work. The more expensive a thing, normally the tighter the tolerances, because you are paying for tighter quality control as much as anything.

More after the break...