Hello everyone,
Thank you all very much for your thoughts and ideas, they're much appreciated.
Some comments to some of your answers following:
Originally posted by jatrax .... On some lenses it is better to start at a distance and focus toward close, on some lenses the reverse works better. ...
For what I understand from your statement it seems to me the behavior is similar to what I get with the D7000 or A65.
With the D90 it didn't matter where I was coming from, the camera allowed the shutter to be released only when the image was in focus, this made a world of difference when shooting fast birds. In the D90 there is a very slight difference in the focus position coming from back or front, but the subject was always within DOF... always.
Originally posted by IchabodCrane Just a hunch... CIF likely works best with a fast lens that's stopped down a good amount. The fast lens should decrease the "slop" in the focus while the smaller aperture upon actuation will allow higher tolerance of what slop in the focus accuracy remains. Any merit to this?
Well, yes, it's a good suggestion, it's a workaround to this limitation. But it only works if the used lens have auto aperture, and if I'm willing to use it stopped down, witch happens rarely
Originally posted by Laurentiu Cristofor At the moment, for me, that is the Olympus E-M5.
Ok, but why? I also have a G5, witch for MF usage is not that different than the EM5. But when it comes to MF I far prefer the Sony. Peaking puts it on another level, so does the EVF.
Originally posted by Laurentiu Cristofor CIF is only as good as the camera AF is.
That was my expectation, but unfortunately not my experience, The D7000 and D300 AF are both very good, much better than D90, but still I have problems with trap focus on these bodies, the D90 on the other hand is much more reliable.
IMO a good AF doesn't warrant a good CIF/trap focus.
Originally posted by Laurentiu Cristofor With the K10D and K-7, I always noticed that the focusing confirmation stayed on for a bit while I was adjusting focus - this is a bit like focus peaking which can continue to cover some area while you keep adjusting focus.
So my answers to all your quoted questions are: CIF is as accurate as the camera's AF, it can release the trigger when the focus is not perfectly acquired but is close, and there are diferences between the bodies, because the AF algorithms are continuously being improved.
Having peaking showing doesn't mean it's the point of focus...true. But with peaking you can adjust back and forth and look for the best point, and used like that is 100% acurate and also very fast. This at least is my experience with it.
CIF on the other hand cannot be used like that, to be reliable it should only allow the shutter to be released if the chosen focus point is at least somewhere within DOF, that was what happened with my older bodies. Is the newer bodies with newer and improved AF algorithms that are giving me problems.
Getting back to peaking, as good as I find it, in it's current state it's only really good for static or slow moving shots, for anything moving fast I still preferred my D90s trap focus.