Originally posted by jpzk lytrytyr
This was an excellent link, and thanks for posting it.
I've read the entire review TWICE and came to the conclusion that it is NOT BF/FF which I am dealing with but an inherent "feature" of the lens itself, because of its optics.
Nothing actually wrong with the lens, but rather a matter of understanding how it works.
Without this review, I would have been totally discouraged with this lens.
Now to the nitty-gritties ....
While using the lens wide open, the correct focus lies usually a little bit in front of the point that has been expected. Beside this, the focus confirmation function of any AF-camera is a relative improper tool for accurate focusing of an f/1.4 lens on closer distances. Also, a standard focusing screen and viewfinder of an SLR camera shows the limitations of accurate manual focusing with an 85mm lens at f/1.4. For instance, it is not possible in practical use to focus more accurately than about +/- 2 cm at an object distance of 1m without additional magnification systems. For accurate focusing at full aperture or stopped down a little bit, we strongly recommend:
-use a tripod if possible
-use zoom-in function in live-view mode while the lens has been stopped down to the designated f-stop.
-focus bracketing exposures (with small steps of rotating the focusing ring)"
Zeiss mentions the "standard" focusing screens are not the best to use with this lens.
So, I will definitely look into getting a proper screen. Which one? There are at least two out there which are considered among the best:
Katz-Eye and the Canon one discussed in another thread.
" ... without additional magnification systems ..." what is this exactly?
They suggest LiveView and focus bracketing; that's fine with me (I will give it a go today) but that could also be a problem when you want to use the lens wide open and via the viewfinder!
So, it looks like I will be in the market for a focusing screen although I am very leary about the installing and perhaps "shimming" that thing.
If that is what it takes ... I will likely ask for much more help here!
Since I also have a K7, I should do the screen job on that camera rather than on my K5 ... just in case.
I use the K7 most often with the DA*16-50 and other lenses (primes) and pretty much leave the "big lenses" to the K5 (DA*300/4 and Tammy 70-200/2.8).
That seems to have wrapped up my quest for an answer to my original, and erroneously titled, query.
To all of you who have responded ... Big Thanks!!
I will report back here with my "tests"..
JP