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08-08-2015, 02:22 AM   #1
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DxOMark measures K-3II

DxOMark tests K-3II

Results not much different from K-3, unsurprisingly. D7200 is still the APS-C to beat.

Pentax K-3 II sensor review: Reaching for the stars - DxOMark

But no tests were performed in pixel-shift mode. Pity, that would have been quite interesting.:

QuoteQuote:
the K-3 II lags marginally behind the best APS-C sensors in models such as the Nikon D5300 or the Sony A6000 for DR, noise, and color discrimination, but the results do not include sensor resolution or data from the multi-shot Pixel Shift option.



Last edited by rawr; 08-08-2015 at 07:17 AM.
08-08-2015, 02:36 AM   #2
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Subtext: we did not test in areas that would show Pentax cameras to be superior?
08-08-2015, 02:49 AM   #3
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The D7200 is the clear winner if you only consider the sensor, but they do mention in a comparison paragraph: "Although very capable, the Nikon D7200 falls a little short of expectations in this segment. It lacks the durable build of its rivals, and while Nikon has upgraded the buffer, it still has a rather modest 6fps (12-bit) or 5fps (14-bit) continuous shooting capability. It also has just one central cross-type sensor at f/8, and it’s those kinds of features that limit its appeal to professionals. Notwithstanding those few restrictions that may or may not be relevant to your photography, with a DxOMark score of 87 points, the sensor in the Nikon D7200 is the best in its class."

It is odd the D7200 tests so much better. I suppose Nikon gave Sony specific tweaks to implement in the sensor to maximize dynamic range, as the D7200 tests even better than the K5 in this respect and really close to full frame levels (it is quite a bit worse than full frame in SNR).
08-08-2015, 07:53 AM   #4
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Given the same actual ISO values, the difference that I see between the D7200 and K-3s sensors is negligible. The tweak is that D7200 base ISO is approx 30% lower than K-3s. i.e. an D7200 user is tricked by experiencing 30% slower shutter speed than a K-3 user, but he/she'll will never notice it. In Tv more, K-3 user will be shooting sport at ISO1600, the D7200 user will be shooting at ISO2200 to get the correct exposure. The D7200 is designed to get good at DXO tests. But generally speaking, since the K-5 era, the improvement steps are tiny, negligible. So, apart from other things such as AF perf. , burst rate or other camera functions; there is not big incentive to buy yet another APSC camera. A better way to get better sensor performance is to buy a camera with a larger sensor; i.e full frame or medium format.


Last edited by biz-engineer; 08-08-2015 at 07:59 AM.
08-08-2015, 09:32 AM - 3 Likes   #5
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"It ranks in 50th place overall and in joint third place for Pentax models tested to date, including the medium-format Pentax 645D (we’ve yet to test the potentially impressive Pentax 645Z)."

"Potentially impressive?" They are too chicken to touch that beast
08-08-2015, 09:36 AM - 1 Like   #6
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QuoteOriginally posted by Rondec Quote
It is odd the D7200 tests so much better. I suppose Nikon gave Sony specific tweaks to implement in the sensor to maximize dynamic range, as the D7200 tests even better than the K5 in this respect and really close to full frame levels (it is quite a bit worse than full frame in SNR).
Are you sure it is a Sony sensor? Nikon was using the Toshiba 24MP in the D5200 and D7100. Nikon does in fact design its own sensors. Renesas has fabricated the sensors for the D700, D3, D3s, D4, D4s, Df, D3100, & D3200. Toshiba fabricated the D5200, D7100, and possibly the D5500 and D7200. Sony makes the D610, D750, D810, & D7000. Sony fabricated the sensor for the D3x, but it was a Nikon design.

People seem to think there is some special deal between Nikon and Sony. I think it goes back to when Nikon leased fabrication from Sony for the D3x.
08-08-2015, 10:17 AM   #7
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QuoteOriginally posted by stillshot2 Quote
"It ranks in 50th place overall and in joint third place for Pentax models tested to date, including the medium-format Pentax 645D (we’ve yet to test the potentially impressive Pentax 645Z)."

"Potentially impressive?" They are too chicken to touch that beast
But they are testing it this month, though ; waiting for Pentax to provide them with it since last year.

Last edited by Zygonyx; 08-08-2015 at 11:49 AM.
08-08-2015, 10:26 AM   #8
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I check out DxO just like most of the people here, but I really don't but a whole lot importance on what they report. Cameras can have nearly identical curves on the graph, buy produce pictures of different quality. The Canon 5D and Sony A900 have nearly identical S/N curves, but because the Sony A900 has 2x as many mega-pickles the final images look better with more detail. The same can be said for cameras with and AA filter vs without an AA filter.

08-08-2015, 11:49 AM   #9
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QuoteOriginally posted by Zygonyx Quote
But they are testing it this month, though ; waiting Pentax to provide them with it since last year.
Really? That's exciting to know. I didn't realize Pentax was holding it back? It seems letting it get a dxo score would have helped sales for those people who like to go by dxo scores. I prefer looking at samples, and the samples for the 645z found on the imaging resource site amaze me!
08-08-2015, 11:56 AM   #10
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Well, all i know is the fact they just got a body from Pentax France a few weeks ago. The other way to do would apparently have been to find a private user to get it beforehand.

---------- Post added 08-08-15 at 12:03 ----------

QuoteOriginally posted by Winder Quote
I check out DxO just like most of the people here, but I really don't but a whole lot importance on what they report. Cameras can have nearly identical curves on the graph
The two important points you're refering to :
- there is no credible alternative "thermometer" to their physical and mathematical mesures to date ; so everyone is looking at them ;
- constructors regularly "tweak" their body firmware to produce advantageous results through their protocols.
So, nothing really new in the wild west

Last edited by Zygonyx; 08-08-2015 at 12:11 PM.
08-08-2015, 12:10 PM - 2 Likes   #11
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To put things into perspective, the new crop sensors out-perform the old full-frame sensors of just five years ago.
This is why so many people are happy with crop sensors and are questioning upgrading to FF.

Michael
08-08-2015, 12:15 PM   #12
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I partially agree as far as sensor dynamics is concerned, (and i am almost confident the new 645Z sensor will not bury out the 645D's in that respect) ; but definitely not as far as electronic noise is concerned.
08-08-2015, 12:55 PM   #13
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QuoteOriginally posted by MJSfoto1956 Quote
To put things into perspective, the new crop sensors out-perform the old full-frame sensors of just five years ago.
This is why so many people are happy with crop sensors and are questioning upgrading to FF.

Michael
I'll keep my K-01 for a few years.
08-08-2015, 04:14 PM   #14
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QuoteOriginally posted by Zygonyx Quote
But they are testing it this month, though ; waiting for Pentax to provide them with it since last year.
It will be very interesting to see its performance against the new Sony 42 MP FF sensor. I assume the Canon 5DS will be no match.
08-08-2015, 04:31 PM   #15
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QuoteOriginally posted by RonHendriks1966 Quote
I'll keep my K-01 for a few years.

Me too. We have to keep using them to remind ourselves just how bad it is!
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