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Tuesday, September 06, 2011

One Stop ISO Advantage of NEX-5N Over K-5

This post is self-explanatory and a picture worths more than a thousand words sometimes. So, here we go:-

http://forums.dpreview.com/forums/readflat.asp?forum=1036&message=39288778



I am afraid that I have to agree with the OP that the ISO 6400 picture of the 5N is very close to that ISO 3200 picture of the K-5, for both the amount of visible noise and also for the amount of image details that are retained. So, it is either that Sony has improved their that 16.2MP Exmor sensor and has made a new version, or that they have improved their image processing, so that they have successfully sucked out more from the same sensor, or maybe both!


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Raist3d's avatar

Raist3d · 708 weeks ago

You do realize that's a JPEG comparison right? Rice, I welcome critical thought but it seems to me that you post a lot of stuff with a sensationalist headline, usually "against Pentax" and not much research.

Again, I do appreciate critical thought, not fanboyism, but you don't help matters by doing something like this.
http://forums.dpreview.com/forums/read.asp?forum=...
8 replies · active 708 weeks ago
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Art's avatar

Art · 708 weeks ago

Raist3d, did you read the replies to steelski post that you link? Pentax RAW FILES are COOKED, as noted by dxomark
http://www.dxomark.com/index.php/Publications/DxO...

On K-5 the RAW NR starts at ISO 3200, so you can't compare K-5 RAW files at ISO 3200+ with other cameras.
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Raist3d · 708 weeks ago

I know that the Pentax RAWS start noise reduction coming ISO 3200. I didn't need to read that reply because I already knew that. As far as comparing them I can compare them if I can still get better results than the other cameras with some noise reduction. While I would prefer Pentax to leave the file untouched, if it's done at a very early stage in the RAW processing I don't mind as much.

As for reading replies, did you read the reply too where it was mentioned the Nikon D7000 which doesn't cook files seems to do same or better?

And still then, how does that change what I said? Look at the stuff you wrote and you are still comparing JPEGS. That's a very flawed comparison. So a new camera from Sony has a JPEG engine that beats Pentax's last year camera. Well, surprise! Technology marches forward.

Even the Pentax Q seems to have a more refined JPEG engine- look at the reds of the Q vs the reds on the K-5. The K-5 unless you are using slide film tends to do this nasty magenta cast (how's that for objective critique?).

But look at what you wrote and the conclusions you jumped too. Honestly, think that through, if you mean well that is.
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Raist3d · 708 weeks ago

And talking about reading, I made a mistake and I thought that was Rice how replied. LOL. My apologies on that one Rice.
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RiceHigh 110p · 708 weeks ago

In fact, all RAW files are cooked, camera regardless. Actually believing any RAW is uncooked is naive, frankly.
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Raist3d · 708 weeks ago

They are certainly far less cooked than a JPEG if they are as you say. Comparing JPEG output to denote sensor performance- now that is truly naive.
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Art · 708 weeks ago

I am pretty sure Nex-5 will score around A580 score on dxomark, which is within margin of error of D7000/K-5. But the simple fact remains: Nex-5 ISO 6400 looks better than K-5 ISO 3200, for out of camera jpeg, that 99% of people use :) That's a fact that anyone can confirm by going to IR ;)
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Raist3d · 708 weeks ago

Considering the lens speeds that people are used to use with a Nex-5, I think the K-5 comes on par if not ahead anyway :-)

As for 99%, I think you need to speak for yourself :-) Probably more JPEGS on the Nex and more Raws on the Pentax.
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RiceHigh 110p · 708 weeks ago

Your meant the 5N? (Instead of the 5.)

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