Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-02-2010, 02:01 PM   #16
New Member




Join Date: Oct 2010
Photos: Gallery
Posts: 20
[langtitle=it]Quale è il problema?[/langtitle]

DxOMark credo che sia abbastanza affidabile ho avuto diverse esperienze con altre fotocamere per constatare che quasi sempre ci azzeccano inoltre dopo avere visto i campioni di iso scattate con K-x e K-r avvalora ancora di più l'idea che mi ero fatto, sembra che la K-x sia leggermente meglio in qualità d'immagine rispetto alla k-r. Chiaramente è una mia opinione personale ma il valore della k-r va misurato in funzione delle sue altre specifiche velocità af migliorata, alimentazione diversificata, punti AF e altri che adesso non ricordo ma che danno qulacosa in più.
Il prezzo del K-r unica nota dolente, qualità immagine ottima.

11-02-2010, 02:45 PM   #17
Pentaxian
johnmflores's Avatar

Join Date: Apr 2009
Location: Somerville, NJ
Photos: Gallery | Albums
Posts: 5,187
Sigh, if only I had read this before taking ~1800 photos last month with my awful K20d. All that time wasted with such a piece of dung.

You chart readers and pixel peepers are taking the "photo" out of "photography"!
11-02-2010, 02:53 PM   #18
Veteran Member




Join Date: Dec 2009
Location: Sacramento, CA
Photos: Gallery | Albums
Posts: 728
I don't think I'm understanding the Sports Low-light ISO score.

K-r: 755
K-x: 811
D3100: 919

I don't base my purchases on DxOMark, I'm just trying to understand how they're relaying their info. Is a higher value supposed to be better? Or is the SNR 18% chart that they have a better measurement?
11-02-2010, 03:00 PM   #19
Site Supporter
Deimos's Avatar

Join Date: Oct 2010
Location: Kingdom of Wonder
Posts: 1,709
QuoteOriginally posted by einstrigger Quote
I don't think I'm understanding the Sports Low-light ISO score.

K-r: 755
K-x: 811
D3100: 919

I don't base my purchases on DxOMark, I'm just trying to understand how they're relaying their info. Is a higher value supposed to be better? Or is the SNR 18% chart that they have a better measurement?
agreed. also as someone else mentioned some of their stats on the k-r such as 12fps are off, so who knows what else is off?

11-02-2010, 03:01 PM   #20
Pentaxian




Join Date: Sep 2006
Location: Kaunas
Posts: 1,452
QuoteOriginally posted by einstrigger Quote
I don't think I'm understanding the Sports Low-light ISO score.

K-r: 755
K-x: 811
D3100: 919

I don't base my purchases on DxOMark, I'm just trying to understand how they're relaying their info. Is a higher value supposed to be better? Or is the SNR 18% chart that they have a better measurement?
They state here ISO value which, according to them, still give acceptable quality.
11-02-2010, 03:03 PM   #21
Veteran Member
Eruditass's Avatar

Join Date: Jul 2009
Location: Pittsburgh, PA
Photos: Gallery | Albums
Posts: 2,206
QuoteOriginally posted by einstrigger Quote
I don't think I'm understanding the Sports Low-light ISO score.

K-r: 755
K-x: 811
D3100: 919

I don't base my purchases on DxOMark, I'm just trying to understand how they're relaying their info. Is a higher value supposed to be better? Or is the SNR 18% chart that they have a better measurement?

https://www.pentaxforums.com/forums/pentax-news-rumors/120739-dxomark-rates-p...ml#post1248213
11-02-2010, 03:39 PM   #22
Senior Member




Join Date: Feb 2008
Location: Mount Shasta
Posts: 185
DxOMark is meaningless tricked-up numbers that bear no relation to real world shooting. It is electronic nonsense.
11-02-2010, 04:51 PM   #23
Veteran Member
mattdm's Avatar

Join Date: Feb 2007
Location: Boston, MA
Photos: Gallery
Posts: 2,964
QuoteOriginally posted by Eruditass Quote
I believe the K-x fared worse in DxO compared to the D90 (and the same very well may happen with the K-5 and D7000) because of their high requirements for low-light ISO. They want a DR of 9 EV and 18bits of color. The Nikons typically hold onto their DR and color depth longer but taper off at the end, while the Pentax cameras end up having better scores at high ISO, but worse scores at medium ISOs (where one would get the DR and color depth requirements)
To be fair, that seems like a real-world advantage for the D90 in many practical situations. I'd rather have stellar medium ISO and decent high ISO than "just" good at both.

11-02-2010, 05:04 PM   #24
Veteran Member
Eruditass's Avatar

Join Date: Jul 2009
Location: Pittsburgh, PA
Photos: Gallery | Albums
Posts: 2,206
QuoteOriginally posted by mattdm Quote
To be fair, that seems like a real-world advantage for the D90 in many practical situations. I'd rather have stellar medium ISO and decent high ISO than "just" good at both.
I agree, just pointing out the discrepancies people often site between 100% crops at high ISO of these cameras vs these scores. And of course, sharpness isn't compared on DxO
11-02-2010, 05:39 PM   #25
Pentaxian
audiobomber's Avatar

Join Date: May 2008
Location: Sudbury, Ontario
Photos: Albums
Posts: 6,688
QuoteOriginally posted by johnmflores Quote
Sigh, if only I had read this before taking ~1800 photos last month with my awful K20d. All that time wasted with such a piece of dung.

You chart readers and pixel peepers are taking the "photo" out of "photography"!
I hear ya! I prefer photos from my K20D compared to my K-x up to ISO 1600. That's a much important more range to me than mediocre, barely acceptable or semi-crappy (depending on your perspectve) results from ISO 3200 to a gazillion.
11-02-2010, 06:12 PM   #26
Pentaxian




Join Date: Aug 2007
Location: Madison, Wis., USA
Posts: 1,510
This is data. One very specific set of data. One very specific set of (generally) carefully-measured data.

It's not a camera recommendation. It's not intended to be - by anyone, at DXO or in this forum.

Why all the whinging and carrying on?
11-02-2010, 06:15 PM   #27
Pentaxian




Join Date: Mar 2009
Location: Perth Australia
Photos: Albums
Posts: 1,511
I do worry about DxO, because its our only source of numbers based measurement on performance, which I like. But they put numbers in there like 12 fps so you wonder how accurate they are with the numbers that affect their scoring.

However I still like and use DxO because their findings in number terms always match my 'feelings' from looking at comparometer images etc...

So while i use DxO i always double check with real examples to see if they have not missed a 0 :P
11-02-2010, 06:28 PM   #28
Veteran Member
omega leader's Avatar

Join Date: Jan 2008
Location: Niagara Region, Ontario Canada
Photos: Gallery
Posts: 417
Remember everyone that a 5 point difference is 0.33 of a stop. Not significant at all.
11-02-2010, 06:31 PM   #29
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,253
Having seen sample photos from the K-r and nothing their unmatched clarity, I can only conclude that this scoring is complete and utter BS, unless, of course, a mistake was made somewhere.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

11-02-2010, 06:54 PM   #30
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 16,253
QuoteOriginally posted by Adam Quote
Having seen sample photos from the K-r and nothing their unmatched clarity, I can only conclude that this scoring is complete and utter BS, unless, of course, a mistake was made somewhere.
I really think they measure what they measure. The reality is that crop cameras, even good ones start losing dynamic range around iso 900 and full frame cameras around 1800. The numbers being thrown around sound like bigger differences than they are. These are quarter stop differences or less that are talked about -- not really visible in real shooting.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
dxomark, k-r, pentax, pentax news, pentax rumors
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DxOMark scores Pentax 645D det1rac Pentax Medium Format 1 10-26-2010 07:12 PM
Pentax Kx Now on dxoMark taurus9 Pentax DSLR Discussion 15 03-10-2010 02:28 PM
(dxomark) K20D and K7. Reportage Pentax DSLR Discussion 20 01-13-2010 05:06 AM
Help with rates! mtroute Photographic Technique 1 10-14-2009 03:41 PM
PZ-1p - Going Rates? legacyb4 Pentax Film SLR Discussion 3 09-23-2008 04:22 AM



All times are GMT -7. The time now is 12:00 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top