Originally posted by pentup I always wanted that too; do any manufacturers have it though? You could shoot in bursts, I suppose, and some shots might simply by accident be better focused than others...
When I'm close to the subject and wide open I sometimes find moving my head back and forth very slightly can be more convenient than making tiny turns of the focus ring -- that depends on the lens though.
Another thing that seems to help me is to focus on specular highlights, if they're present at or near the plane I want to focus on. My eyes simply find it easier to judge when a specular highlight is "tighter" or more diffused than when various edges look sharper than other edges. (especially given the problems with inaccurate portrayal of depth of field by the view finder that Marc mentioned) This can be especially helpful with portraits: I zero in on the specular highlights in the iris of the subject and try to get that spot of light as undiffused looking as possible. I have no idea how accurate or practical this is for others, but at least it keeps me from going nuts tweaking the focus back and forth.
Thanks Pentup!
(Selectable focus bracketing) That is wishful thinking I suppose ...
I think you trick with moving the head back and forth a little while you keep shooting (continuous?) makes sense. Never tried it but I just might.
(Specular highlight) Something I have read somehere but cannot remember who/where/when. But that makes sense in portraiture since the eyes of the subject usually will be the main focus point (target), if I am not mistaken. I don't so a lot of portraits, save for my own family, but this sure would be something to practice.
Back to the business of the 85/1.4 and manually focusing ...
I just a series of 40 or so pictures, with different settings (mainly changing the ISO - shutter speed) in Live View and through the VF.
First series targeting small print with very little contrast at near MTF.
Second series targeting slightly larger print with higher contrast.
Most were at f1.4 but I did some shots in incremental "stop down" until I reached F5.6. This was to check for focus shift (I mean ... "check" and not "test" really) There WAS focus shift, just as described by the Zeiss company's response to a review which was quoted earlier here.
Camera on a tripod and remote 3 second delay used.
Findings (as expected) :
Via the viewfinder: most shots wide open and up to f 4.5 were OOF. That was using the green hexagon as confirmation of focus ... of course it did not do that right.
Via Live View: most shots were bang on (from f 1.4 to f 4.5).
Stopped down further (f 5.6 and smaller aperture): quite acurate focus in LF and with the VF.
Problem with Live View with this manual-focus lens ... the "zoom" in and out feature that would normally activates when using an AF lens simply does not work here. So you have to "approximate" the focus the best you can. There is no confirmation "beep" or "hexagon" either.
This is either normal or I am doing something wrong ... maybe someone can confirm this? I am hoping for the latter (being wrong) and rectify it.
I even tried a few shots with CIF but that was a total disaster when the lens was wide open.
I have not yet uploaded the files to my computer/Flickr, so sorry ... no pics to show yet.
I will do that when I find the time later during the weekend.
So that is my reoprt for today.
Tune in soon for more ... with pictures.
JP