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05-15-2013, 05:58 AM   #1
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If next Pentax DLSR uses 24mp Sensor of Nikon D5200, ...

If next Pentax DLSR uses 24mp Sensor of Nikon D5200, I nearly have no doubt to upgrade my gear from current K5!

- The 1st attached is taken by my nephew with D5200.
- The 2nd one is taken by me with K5 + DA18-135.

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05-15-2013, 06:11 AM   #2
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They aren't the same picture, specifically, all the dark areas have been eliminated from your frame, causing different exposure values. If you do a crop of the Left side of the top image without the top and bottom darker areas the images are very similar. I don't see that you can draw any conclusions at all from these two images, as presented. Also there is no exif for the first image. Just as a general observation, the second image could be a crop of the first.

I've done comparisons of a D3200 and K-5 and found the images to be functionally identical for hand held shots. (I couldn't convince my friend to use a tripod.)
05-15-2013, 06:39 AM   #3
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Of course, the photos are not taken in the same time, light and composition. Just indicate a good sensor should be there!
05-15-2013, 10:19 AM   #4
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QuoteOriginally posted by SKwan Quote
If next Pentax DLSR uses 24mp Sensor of Nikon D5200, I nearly have no doubt to upgrade my gear from current K5!
Even if Pentax next DSLR is a K-r replacement?

05-15-2013, 10:30 AM   #5
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It is a good sensor that can take advantage of very good glass; but, I agree, nothing can be determined from these samples. The only lenses you have that might show a resolution increase with this sensor are the DA40 and the DFA 100 WR. I doubt you'd see any improvement with the 18-135.
05-15-2013, 11:09 AM   #6
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QuoteOriginally posted by kenafein Quote
The only lenses you have that might show a resolution increase with this sensor are the DA40 and the DFA 100 WR. I doubt you'd see any improvement with the 18-135.
+1

To take full advantage of any of todays sensors the optics in front of it have to resolve, this is also a key ingredient in overall ISO performance which can clearly be seen when shooting consumer grade glass versus upper tier pro grade glass that resolves quite a lot higher (more lines in a given space produces more detail and hides/blends more iso noise into the resolving detail patterns thus nearly eliminating noise to a certain degree).
05-15-2013, 11:38 AM   #7
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A DA 40 peaks out at 2475 lw/ph in photozone testing... the 18-135 reaches over 2600 lw/ph in several categories, including 24mm and 50 mm. I'd also point out that resoluion can also be expressed as a percentage of the thoeretical max.

A K-5 has 3200 pixels of resolution. The best lens (I beleive it was a Sigma 70 macro , I've seen tested in any test produced 2900 lw/ph but the average is around 2200-2300. Based on observations of what I've seen to date... with the vertical resolution on a 7100 increasing to 4000 (from 3200 on a K-5) I would expect the increase in resolution to be somewhere in the range of 75% of that or 3000 lw/ph. The only test I've found of an actual 24 MP APS-c sensor suggested it could achieve, 2500 lw/ph, ( Nikon D3200 Camera Exposure - Review ) Considerably less than the 75% of max vertical res, I expected, but still 200 to 300 lw/ph increase over a 16 MP sensor. We've definitely hit the wall of diminishing returns when it come to APS-c apparently. When you consider that it's been suggested that the increase in using a K-5 IIs over a K-5 is about 10% , and I'm really interested in seeing what the increase in the K-5 IIs is over the K-5, with the D3200 being about a 10% increase over the D7000, I need a little bit more information to write 24 MP off, but not much. The only way it pans out for me would be a 24 MP filterless APS-c Pentax, where it turned out you got he 10% for being 4000 pixles deep, and an additional 10% for the lack of filter, making a 20% increase over K-5. For at least a total of a 20% increase in lw/ph. If they cancelled each other and all you got was an additional 10% I'd rather stay with 16 MP and virtually the same resolution. A lw/ph increase of 200 is visible, a lot of times the difference between one lens and another can be that much....but not critical. IMHO you'd have to get at least 400 to be worth buying another camera for. Like the difference between a K-5 and a D600 or D800.

Last edited by normhead; 05-15-2013 at 02:18 PM.
05-15-2013, 11:53 AM   #8
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Well different lenses do make different pictures. More DOF with a more wide-angle does give a large difference.

05-15-2013, 11:57 AM   #9
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The above post was edited. I can't delete this correction, for some reason the delete button is gone. Apologies to all concerned.

Last edited by normhead; 05-15-2013 at 02:20 PM.
05-15-2013, 07:13 PM   #10
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QuoteOriginally posted by normhead Quote
The only test I've found of an actual 24 MP APS-c sensor suggested it could achieve, 2500 lw/ph,
You may be interested in having a look at photoreview.com.au - they have handy resolution x ISO charts for all the cameras they test, including tests of 24 MP DSLR's like the D5200, D3200, Alpha 99 etc.
05-15-2013, 07:38 PM   #11
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QuoteOriginally posted by SKwan Quote
If next Pentax DLSR uses 24mp Sensor of Nikon D5200.
Possible, but Toshiba makes the sensor in the Nikon D5200. I would expect Pentax to stick with Sony for the next round of sensors.

Sony has a new 20MP sensor, but it has not looked like a good replacement for the current 16MP. I hope we do see a 24MP sensor in the K-3 that can exceed the 16MP sensor in IQ at all ISO settings. Who knows. I don't think Pentax will go with a sensor that does not provide a notable increase in performance.
05-15-2013, 08:02 PM   #12
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QuoteOriginally posted by rawr Quote
You may be interested in having a look at photoreview.com.au
That place rates the K5 (and actually the K30) higher than the K5II... lol
05-15-2013, 08:41 PM   #13
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QuoteOriginally posted by joe.penn Quote
That place rates the K5 (and actually the K30) higher than the K5II... lol
Their ratings reflect a cameras position in the market re competitors at a point in time. A rating of 9 in 2008 may not mean a camera is better than one that scores 8.5 in 2013.

Anyway, the point of interest here is the resolution charts, not the arbitrary overall rankings.
05-15-2013, 08:59 PM   #14
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I just don't think I want to go with a 24mp camera that is aps-c unless it has the filter removed and even then, I don't know if it is worth it. My k5 is producing images that I have comfortably printed at 16x20 and 20x30. I am sure than once the IIs arrives, it will be fine to go even larger if I wanted. The only way that I want more mp is if we are talking FF. I have edited pictures taken with a friends d700 and I did feel constrained in cropping due to the mp, so I am thinking I would want 24 on a Pentax release. I think the 36 on the d800 was a bit of overkill. You would be going through a hard drive every two weddings!

Last edited by Allison; 05-15-2013 at 08:59 PM. Reason: Typo
05-15-2013, 10:35 PM   #15
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QuoteOriginally posted by Fogel70 Quote
Even if Pentax next DSLR is a K-r replacement?
I intend an ugrade ... 24mp in K5II with more features and faster operation speed(saving, responding ...)


QuoteOriginally posted by Allison Quote
I think the 36 on the d800 was a bit of overkill
Agreed. Howerver, if different sizes(16, 24 or 36) of raw format can be selected, 36mp is really an advantage!
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