Re: DxO ranks Nikon # 1 & 2...but where does resolution fit in?

On Nov 18, 6:52 pm, Me <u...@xxxxxxxxxxxxxx> wrote:
RichA wrote:
On Nov 18, 2:13 am, Me <u...@xxxxxxxxxxxxxx> wrote:
RichA wrote:
On Nov 18, 12:08 am, Me <u...@xxxxxxxxxxxxxx> wrote:
RichA wrote:
On Nov 17, 9:39 pm, Me <u...@xxxxxxxxxxxxxx> wrote:
RichA wrote:
 http://www.dxomark.com/index.php/eng/DxOMark-Sensor
DxO are nuts.
Hands-on experience with /subjective/ assessment of performance leads to
far different conclusions than their so-called "objective" performance.
Case in point - Pentax K20d / Samsung GX20.
The sensor in that camera truly sucks - yet they give it a high score.
And yet most reviewers are fixated on noise to the extent they forget
about resolution of detail.  Check out this dpreview comparison
between the K200D (Pentax) and a few others.  Look at the detail (or
lack of) with the Nikon D60.  You could clean up all the noise in the
Pentax image, it would still show more detail.  When you take raws
from the Nikon D300 and the Pentax K20D, they are virtually the same,
with the Pentax having slightly higher resolution and the Nikon having
greater per pixel sharpness.  I've compared the two cameras at length.
http://www.pbase.com/andersonrm/image/105998943
All I can say is that the DxO analysis is seriously flawed.
Take a Canon 5d and K20d and compare raw files side by side.
The K20d has far worse noise performance, far far worse usable dynamic
range, and much less "per pixel" sharpness than the 5d.  You'd have to
be freakin' blind not to see it. Yet DxO rate them about the same...
According to them the Samsung sensor is /miles/ ahead of the Canon 40d
sensor.  That's so laughable I could cry.
The problem with /wankers/ like DxO - is that /idiots/ will read that
garbage and be inclined to believe it.  Already ludicrous landscape have
links to it - probably others.
Their web page looks pretty good though - except it crashes Mozilla
Firefox if the interactive pages are loaded on more than one tab.
A couple things;  the only real issue with the K20D sensor is banding
in the shadows at higher ISOs, A very annoying problem.
It's not just banding - there's just no recoverable detail in the
shadows when pushing. Compared with 40d and D300, the K20d is wiped out
in that area. There's too many wankers making obscurely quantified DR
measurements - but who apparently never take photos where DR is needed..

Well, it's like Olympus which does have reach into the shadows.  It's
there, but who would want it?  Noisy and banded.

Something DxO seem to have missed - compared to the (old) Canon 5d, for
which pulling detail from the shadows is remarkably good (just not
compared to D3/700!)



"I have shown that one can boost Nikon D300 low ISO images by 4 stops
where as one can only boost K20D images by 2 to 2.5 stops; at high ISO's
the Canon 40D and the Nikon D300 have about the same noise at ISO 1600
as the K20D does at ISO 400

This is wrong.

http://www.pbase.com/andersonrm/noise_tests_pentax_k20d__nikon_d300

Yeah - I'd say so.  Why would you bother showing sample photos with no
detail and with wildly varying exposures?

The varied exposures are because the Pentax cameras produce dimmer
(30-40% in PS about 0.5 to 0.7 stops) images than either Nikons or
Olympus cameras, so you have to provide varying exposures to:
1. Show what the Pentax produces when exposed exactly the same as the
Nikon.
2. Show what it produces when you expose to produce the same
illumination level as the Nikon.



.

Relevant Pages

  • Re: DxO ranks Nikon # 1 & 2...but where does resolution fit in?
    ... The sensor in that camera truly sucks - yet they give it a high score. ... I've compared the two cameras at length. ... All I can say is that the DxO analysis is seriously flawed. ... Take a Canon 5d and K20d and compare raw files side by side. ...
    (rec.photo.digital.slr-systems)
  • Re: DxO ranks Nikon # 1 & 2...but where does resolution fit in?
    ... The sensor in that camera truly sucks - yet they give it a high score. ... lack of) with the Nikon D60. ... All I can say is that the DxO analysis is seriously flawed. ... Take a Canon 5d and K20d and compare raw files side by side. ...
    (rec.photo.digital.slr-systems)
  • Re: DxO ranks Nikon # 1 & 2...but where does resolution fit in?
    ... The sensor in that camera truly sucks - yet they give it a high score. ... lack of) with the Nikon D60. ... All I can say is that the DxO analysis is seriously flawed. ... Take a Canon 5d and K20d and compare raw files side by side. ...
    (rec.photo.digital.slr-systems)
  • Re: Cameras that Last AND Last AND Last... (35mm bayonette mount SLRs in particular)
    ... The F2's shutter seems to be quite reliable. ... Some were "pre-owned" and others I bought new. ... Nikon EM - Light streaking, and, if memory serves, unreliable/"jumpy ... Don't care about screw mount cameras. ...
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  • Re: Messing with Mother Nature
    ... the Nikon F-1 with the mechanical ... My digital SLR weighs more than the latest Nikon F6 35mm film camera and my Nikon F100 film camera. ... I just sentTim some of my older cameras - he's a Luddite and can ... lenses from my OM-1/2 days and several of the Oly 4/3rds speciality ...
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