Julian Vrieslander

I am seeing results quite similar to yours, with a D800E and the same lenses.  The numbers that I measure are almost the same.  I tried to post a more extensive explanation of the tests that I ran,...

My results from the DotTune method were also somewhat variable and inconsistent.  I tried this method on my D800E, 24-70mm f/2.8G, and 14-24mm f/2.8G.  The end points of the in-focus range, as...

This matches my experience.  In some of my recent experiments, I used an enlarged version of the split zone plate target that is at the center of the ISO 12233 chart.  It gave more consistent...

http://www.dpreview.com/forums/post/41768731

For a D800, that tilt and shift mechanism would need precision on the order of microns.  Nikon is already having problems achieving that tolerance level in the relative positioning of the sensor,...

Just to be clear, I should emphasize that the variations in best fine tune caused by different target types were greatest when calibrating the outermost (line-type) AF sensors.  For the central...

I have not tried FoTunA.  But I recently ran some tests with FoCal, to see if the choice of focus target affected results.  I was surprised to find that it did.  FoCal's software has features which...

Check out Orcas Island Pottery.  The have a nice collection of crafts from various artists, much of it displayed outside, and in rustic buildings.  The last time I was there, they were working on a...

http://travel.nytimes.com/2010/10/03/travel/03Atget.html?_r=0 http://photo.net/france/paris One more tip: If you will be using a smart phone with internet access, then check out the RATP app for...

Not always true.  I had a D800 with a severe case of the "Left AF" problem.  With f/2.8 lenses, my results were even worse that the samples posted by the OP.  That camera was returned to the...

Are you using a calibrated wide gamut monitor?  Color-managed apps? On my system, the difference between ACR/Adobe Standard and ViewNX/SD is obvious.  I also see a significant difference between...

I have seen the red channel clipping first only in rare, rather pathological cases.  It can happen if the scene has intense red, orange, or yellow, and there is not enough content from other colors...

Interesting. I have a D800E, 24-70mm f/2.8G and 14-24mm f/2.8G.  When focusing these lenses with the center AF sensor, the optimum AF Fine Tune values are in a normal range (0 for the 24-70, -9 for...

If you are planning to be in Paris for a week or more, consider renting an apartment rather than staying in a hotel.  Many of the apartments in Paris are owned by part-time residents, or investors,...

I've seen the same thing in my D800E, also when using Sandisk Extreme Pro 64 GB, 95 MB/s as primary.  I had a Sandisk Extreme Pro 16 GB, 90 MB/s in the CF slot.  The CF card was set for writing...

Actually, the tolerance levels for obtaining accurate focus on a D800 are on the order of tens of microns (if I remember right).  Which is still a real challenge for manufacturing.

Your selection of quotes from Thom's article gives the impression that the "Left AF" problem is driven by panicky users who are doing improper testing.  Certainly, there are people who fit that...

For some reason, this link did not appear in my post: http://www.bythom.com/D800autofocus.htm

http://www.similaar.com/foto/flaat-picture-controls/index.html

Not likely. Nonsense.  A nanometer is one millionth of a millimeter, an impossibly small tolerance for a mass produced camera.  Perhaps he meant microns (one thousandth of a mm). I don't know...