Home · Register · Search · View Winners · Software · Hosting · Software · Join Upload & Sell

Moderated by: Fred Miranda
Username   Password

  New fredmiranda.com Mobile Site
  New Feature: SMS Notification alert
  New Feature: Buy & Sell Watchlist
  

FM Forums | Nikon Forum | Join Upload & Sell

  

Archive 2012 · D800 back from El Segundo..detailed Left AF results
  
 
snapsy
Offline
• • • •
Upload & Sell: On
p.1 #1 · D800 back from El Segundo..detailed Left AF results


They had the body for a total of 5 business days, so very quick turnaround.

The center AF fine-tuned at -5 to -10. The Left and Right fine-tuned at -15 to -20. So like others have reported, the Left/Right asymmetry appears to have been corrected at the expense of the center. But unlike others the compromise I see on mine might be within what I consider acceptable (just barely)

Here is a full comparison of Left/Center/Right at AF tune values of -5, -10, -15, and -20. I didn't do zero because it was obvious from the progression that it would only get worse below -5. Distance to chart was 4 feet 7 inches.

Here are my observations from this full data set:
.....Center AF Point: Sharpest at -10, worst at -20
.....Left AF Point: Sharpest at -20, worst at -5
.....Right AF Point: Sharpest at -15, worst at -5

Here are my conclusions from the above observations:
.....The Left/Right AF points are roughly symmetrical (plus/minus 3 AF tune ticks)
.....The delta between the Center and Left/Right is about 7.5 AF tune ticks

Here is how I will configure my D800+24G based on the above conclusions:
.....For general use I will configure my body for -16 (compromise)
.....For Left/Right use I will configure my body for -20






For magnification reference, here is the full frame of the scene from which these 100% crops were taken. My 5000K LED light was moved between Center/Left/Right for each sequence.
Full Scene



Aug 04, 2012 at 05:15 AM
MikeW
Offline
• • •
Upload & Sell: On
p.1 #2 · D800 back from El Segundo..detailed Left AF results


and this is after it was worked on....screw that, compromise indeed...


Aug 04, 2012 at 05:44 AM
LivLif
Offline
• • •
Upload & Sell: On
p.1 #3 · D800 back from El Segundo..detailed Left AF results


Disappointing that it isn't 100%.


Aug 04, 2012 at 05:46 AM
snapsy
Offline
• • • •
Upload & Sell: On
p.1 #4 · D800 back from El Segundo..detailed Left AF results


FYI, here is a description of my service process:

http://forums.dpreview.com/forums/read.asp?forum=1021&message=42186280



Aug 04, 2012 at 03:24 PM
EB-1
Offline
• • • • • • •
Upload & Sell: Off
p.1 #5 · D800 back from El Segundo..detailed Left AF results


That does not look acceptable to me.

EBH



Aug 04, 2012 at 04:00 PM
snapsy
Offline
• • • •
Upload & Sell: On
p.1 #6 · D800 back from El Segundo..detailed Left AF results


More lenses. 35G and 50G are spot-on













Aug 04, 2012 at 06:16 PM
 

Search in Used Dept. 



Smridevan
Offline
• •
Upload & Sell: Off
p.1 #7 · D800 back from El Segundo..detailed Left AF results


This "fix" is not acceptable at all! I rather just focus and recompose and take my chances than having to make this large adjustment to the AF tune. Nikon needs to get its act together.


Aug 04, 2012 at 07:48 PM
SloPhoto
Offline
• • • •
Upload & Sell: On
p.1 #8 · D800 back from El Segundo..detailed Left AF results


Gah, that is terrible


Aug 04, 2012 at 08:18 PM
snapsy
Offline
• • • •
Upload & Sell: On
p.1 #9 · D800 back from El Segundo..detailed Left AF results


14-24mm. Center and Left AF tuned perfect at -13, but the Right was off. Even at -20 the Right is still a few ticks off, it needs like -25.







Tamron 24-70 VC. Center tunes at -6 but Left trails at around -12 and right trails to -20, similar to the 14-24mm. First set is -20, where Left/Right are good but center is off. Second set is -6, where Center is good but Left is off a bit and Right is off significantly.








Aug 04, 2012 at 08:40 PM
311erin
Offline
• •
Upload & Sell: On
p.1 #10 · D800 back from El Segundo..detailed Left AF results


Just curious, has anyone done a similar test with a camera that has the CAM3000 or a Canon AF system? With no official response from Nikon and more technologies available to ferret out these issues and further insight into PDAF systems thanks to Lensrentals, what exactly are we dealing with here? Is this the new norm? Planned inconsistency?



Aug 04, 2012 at 09:53 PM
snapsy
Offline
• • • •
Upload & Sell: On
p.1 #11 · D800 back from El Segundo..detailed Left AF results


311erin wrote:
Just curious, has anyone done a similar test with a camera that has the CAM3000 or a Canon AF system? With no official response from Nikon and more technologies available to ferret out these issues and further insight into PDAF systems thanks to Lensrentals, what exactly are we dealing with here? Is this the new norm? Planned inconsistency?


Before I sold it I tested a 5DM3 with a 24L @ f/1.4 and it was perfect across the Left/Right/Center AF points.



Aug 04, 2012 at 10:39 PM
snapsy
Offline
• • • •
Upload & Sell: On
p.1 #12 · D800 back from El Segundo..detailed Left AF results


Nikon 24-70mm @ 24mm. Surprisingly for my past few tests PDAF is more consistent than CDAF (Live View).








Aug 04, 2012 at 10:40 PM





FM Forums | Nikon Forum | Join Upload & Sell

    
 

You are not logged in. Login or Register

Username   Password    Retrive password