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Is DPReview Skewing Test Samples to Favor Nikon??

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Lars Rehm said:
There is an easy explanation indeed. The shots in the original 1Ds
review were shot with a 24-70. We later reshot them with a 85mm lens
Click to expand...
But the "later" shots have an earlier EXIF date and are using an earlier version of the 1DsIII firmware!

--
Erik
 
well observed! Ok, I made some investigations with some people who have been here longer than myself.

A long long time ago the 1Ds MkII was shot with a 24-70 because we did not have a 85mm back then. When we reviewed the Mark III we used the 85mm as we usually do with all FF cameras but we also used the 24-70 to compare the Mark III to the Mark II. That's why there are 2 versions of the shot. In the D3x review we obviously used the 85mm version.

--
Lars Rehm, dpreview.com
 
I am not "fan" driven but I do prefer to think that I am prudent in my equipment purchases. If there is the possibility that I made a choice where I didn't buy the best for a comparable price then I didn't do due dilegence in my purchasing process. Now the question becomes do I upgrade to the 1D Mark IV when it comes out or do I liquidate my current lenses and switch brands because another camera maker seems to poduce better gear and is keeping up with the demands of the photography community. How long do you stay on a sinking ship?

When will all this madness stop! Agony! Mommy.....Help!!!!!!!!!!!

--
Ken

Canon 1D Mark IIn + 400D, EF 17-40L, EF-S 17-85 IS, 100-400L IS, 400 5.6L, 500 4.0L IS
Panasonic FZ20 & FZ50
http://ken.smugmug.com/
 
no text

Renato
 
It seems to me that the three recent 85mm shots (5DII, D3x and 1DSIII) all have different focus points in your raw test - D3x to 1DSIII might be a couple of cm or more. Despite f8 the depth of field of the 85mm lenses is not great at this distance.

Do you have a goal for focus in these cases ? It would seem to me that the P of Peru would be good (or the B of Baileys but the Baileys label does not appear such good quality to me).

Many thanks for the clarification
Andrew
 
I posted a question/comment about the basic DPR's DR/tone curve chart measurements in the Open Forum.

http://forums.dpreview.com/forums/read.asp?forum=1018&message=31065256

I think DPR could post in the Learn/Glossary area the protocols for the tests you do in reviews of dslrs, like :
  • lighting in the studio shots (are they daylight calibrated, DR range of scene, etc)
  • DR tests, how it's done and you calibrate the scales in the grpahs (0 EV, for example, as I asked)
  • How do you arrive at the ACR best setting for each camera? What about posting a high DR image at that conversion setting (I think it'd look too flat)?
Thanks
--
Renato.
http://www.flickr.com/photos/rhlpedrosa/
OnExposure member
http://www.onexposure.net/

Good shooting and good luck
(after Ed Murrow)
 
Yes, ofcourse it's a conspiracy. Yaaaaaaaaawwwwnnnn
therickman said:
Compare the RAW samples of the 1DsIII in the D3x review with the
1DsIII samples in the 1DsIII review. They are noticeably different.
In the D3x review, the images are significantly more blurred to make
the D3x samples look superior. Most noticeably, the Umberto coin is
much sharper in the 1DsIII review, and so is the Martini Rossi coat
of arms. The composition, distance, and angle of view of the two
1DsIII tests are different as well. Open the following links in two
separate windows and compare the 1DsIII images side-by-side. The
proof is in the pudding:

1DsIII Review
http://www.dpreview.com/reviews/CanonEOS1DSMarkIII/page28.asp

D3x Review
http://www.dpreview.com/reviews/nikond3x/page28.asp

What's going on here? Is DPReview purposely using inferior 1DsIII
image samples to favor the Nikon? Why didn't DPReview use the
original 1DsIII test samples for the D3x comparison tests? Is the
1DsIII in the D3x tests the same model from the 1DsIII review? If so,
and it's 2 1/2 years old, how much was it used in that time and has
it been recalibrated?

DPReview should have used the original 1DsIII test samples in their
D3x Review.

--
Insert obligatory quote here...
Click to expand...
 
It's obvious that the 1DsIII images have a diferent focus point: see the clips: they are in focus in the 1DsIII picture and out of focus in the D3x one.

That invalidates the test and it seems strange that something so obvious is not corrected before publishing the review. In any case there are too many coincidences to not think that there is some intentional bias ... perhaps the "business conditions"...
--
JReg
 
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