Somehow this issue was on the shelf at Charring Cross on the 6th. Nice tidy article and I think much needed for dslrs but I think we need more, here is why. I have had a D7200 for about two years and to be honest the focus with either of the Nikon lenses I bought with the body is random at best. Static photography with digital is ok though, as an aside I feel I have to dial in more exposure all the time +.7, but moving objects is abysmal. Articles online and in books speak similarly to the AP editorial. Sadly they all seem to skirt the true operation of the systems. For instance AF-C (continuous), which I use moving objects, and prioritization of 'focus' or 'release' in settings. Then most add in back button as an addon. Single point focus can be set to 9, 21 or 51 none seem to work well. In resignation to wasted money I had my 40 year old OM2 serviced now am back with something I can use. I am prepared to try again with the D7200 but we need articles in logical order and more depth please?