Re: High MP count? Bring it in

How many times do you use higher ISOs? That's where Thom Hogan says he sees the biggest difference between 12 bits and 14 bits on the D300, and it makes perfect sense.
Either Thom Hogan is totally clueless, or it's again related to D300 read noise due slower data from sensor. Once you leave the base ISO, the extra bits should just be noise and nothing else.

And this time I will take your D3 challenge. Do you have examples from D3 at ISO 400 and up that show a difference between 14-bit vs 12-bit?
 
How many times do you use higher ISOs? That's where Thom Hogan says he sees the biggest difference between 12 bits and 14 bits on the D300, and it makes perfect sense.
Either Thom Hogan is totally clueless, or it's again related to D300 read noise due slower data from sensor. Once you leave the base ISO, the extra bits should just be noise and nothing else.
"The question that lies underneath this one is: is the noise handling of the D300 good enough to make use of those additional tonal values? My answer to that is a definite maybe. At the base ISO I find it difficult to find anything that shows up as a visible difference. In a few cases at higher ISO values, I have seen small differences in the shadow detail. I actually tried measuring this by doing an exhaustive series of tests, and I came up with perhaps a third of a stop difference in absolute dynamic range at ISO 800 and ISO 1600, less at other ISO values.

Frankly, it's not enough of a difference to worry about. Most people can't see the differences the old Compressed NEF made versus regular NEF--they certainly aren't going to see 12-bits versus 14-bits. That said, I shoot at 14-bits. Why? Because I do all my NEF editing at 16 bits, and I'd rather have the data than not have it, even if it doesn't really give me a tangible benefit. I long ago learned that software is getting more and more clever at pulling out "errors" in data. Who's to say we won't someday have someone manage to figure out how to pull out the read noise in a raw file? That would likely be enough to reveal what's living down in those extra bits."


http://www.bythom.com/nikond300review.htm

There's no contest here, I'll take Thom Hogan's exhaustive tests and good advice against your endless pontification and fanboy rants, every time.
 
ET2:...I will take your D3 challenge. Do you have examples from D3 at ISO 400 and up that show a difference between 14-bit vs 12-bit?

Tony Beach:There's no contest here, I'll take Thom Hogan's exhaustive tests and good advice against your endless pontification and fanboy rants, every time.


(1) Sounds like a "no". You are not going to show an ISO 400+ D3 example you have, demonstrating a reasonably useful photo that is noticeably better due to having the data stored at more than 12 bit depth.

(2) "Fanboy rants" is information-free name-calling. For example, ET2's words would only be "fanboy" words if you had proven them to be wrong on the topic of D3 bit depth needs. Which you haven't. In fact you demonstrate no urgency in providing proof of the subject under discussion, yet you are already ready to name-call as if everyone but ET2 knows that ET2 has been proven wrong. Also, who has proven that Thom Hogan's advice "is good" on this issue, since that's what's still under debate.

Iliah: D3, 13 stops push. Last bit still contains data. [Iliah's example below]

(1) Can't see the EXIF data or your notes identifying this image as having been taken at ISO 400 or greater.

(2) Well this is an image, but it is certainly no example, for ordinary photographers like myself, of a reasonably useful photo coming out noticeably better due to having the data stored at more than 12 bit depth. In other words, if you have to come up with an intolerably poor image of something in order to show that there is some kind of human-detectable difference, it sounds like for all practical purposes that ET2 (and physics professor Emil Martine) is right, increased 14 bit raw file sizes at ISO400+ don't pay their own way on the D3.

 
ET2:...I will take your D3 challenge. Do you have examples from D3 at ISO 400 and up that show a difference between 14-bit vs 12-bit?

Tony Beach:There's no contest here, I'll take Thom Hogan's exhaustive tests and good advice against your endless pontification and fanboy rants, every time.


(1) Sounds like a "no". You are not going to show an ISO 400+ D3 example you have, demonstrating a reasonably useful photo that is noticeably better due to having the data stored at more than 12 bit depth.
It's not for me to do, I have a D300 and not a D3. The difference works out to 1/3 of a stop on the D300, that's what I saw and that's what Thom Hogan saw too.
(2) "Fanboy rants" is information-free name-calling.
ET2 repeatedly refers to Nikon "hole" and Nikon "crap." Enough said about that; indeed, I've certainly had my fill of both of you (already on my Ignore User list from before). I wasn't the one that dragged this up again, but vain attempts at getting the last word in was the motivation of the OP, resulting in far more heat than light (as usual for him).

Also, to talk about Emil Martinec and useful photography is an oxymoron. I've never been so bored and disinterested as when I read his stuff.
 
just curious here...

if that image trying to prove that the last bit contains image data, if that data something meaningful or if that data is noise?

I have no doubt that 14bit data will have more information than a 12bit, and given that in the right condition it will have every bit of detail that you will want. But I cant get much out of that picture that you posted
Well this is an image, but it is certainly no example
It is a demonstration that the last bit contains image data.

--
http://www.libraw.org/
 
And not according to this thread by GordonBGood ...
Once again you are ignoring my question have you ever in your life post-processed a single 14-bit RAW file or you just keep picking bits and pieces of what you read around the Web?

Wait, never mind, you just answered it.
Yes I have, but the WTF does it matter?
It matters because if you did good work you would have seen the difference. It stares you right in your face.
You are going to dismiss it, just like you dismissed DPR review

http://www.dpreview.com/reviews/sonydslra580/page7.asp

"The A580 captures its image information in 12 bit RAW files vs the Nikon D7000's 14 bit. In theory this means the Sony records less shadow detail but in practice, when playing with these Raw files, we could not notice any difference."
You seem to be in bad need of some comprehension skills. If you had it you would realize DPR does not claim there is no difference whatsoever ever like you twist their words to suit you. Instead they are saying that they could not notice difference in shots they took and processed. There is not a single thing there you can hang your hat on firmly. You don't know what was their process and on what to start with but you are jumping to huge assumption, and you know what they say what making assumptions makes you look like.
 
The slightly (tiny) lower noise
About a 1/3 of a stop.
It's pretty simple. All you have to do is take that 14-bit photo with D300 that you posted, convert it into 12-bit RAW. If you still see that 1/3 difference, then obviously it's the extra 2 bit that is responsible for the 1/3 stop. If not, it's lower read noise due to reading the sensor data more slowly.
You keep being stuck on D300 like a pig in a mud, and you keep wanting to truncate 14-bit file into 12-bit one. Why? Because it is muddying up the waters.

You are making a generaized statement about 12-bit vs 14-bit data yet you want to compare outputs from 14-bit capable camera shoehorned into 12-bit only after readout has been done.

Those are two different things. If you want this done right don't Mickey Mouse around, make field correct, get camera that is completely 12-bit and compare results to one that is completely 14-bit.

And please stop being stuck to APS-C. We understand you mighty be living in that world but again you are making generalized statements about bits. Do it on full frame to reduce effect on noise, as that will focus more on topic than on you trying to weasel around.
 
http://www.bythom.com/nikond300review.htm

There's no contest here, I'll take Thom Hogan's exhaustive tests and good advice against your endless pontification and fanboy rants, every time.
Thom Hogan has no scientific understanding on the topic. Even if D3 does benefit from 14-bit, surely it has to be only at the base ISO and at best ISO 200 ? Anything above that, and the last two-bits will have just noise..

Ask your hero Illiah about that.

I asked you to post an example from D3 at ISO 400 and above where you see a difference at ISO 400 and up.
 
(1) Sounds like a "no". You are not going to show an ISO 400+ D3 example you have, demonstrating a reasonably useful photo that is noticeably better due to having the data stored at more than 12 bit depth.
(2) Well this is an image, but it is certainly no example, for ordinary photographers like myself, of a reasonably useful photo coming out noticeably better due to having the data stored at more than 12 bit depth. In other words, if you have to come up with an intolerably poor image of something in order to show that there is some kind of human-detectable difference, it sounds like for all practical purposes that ET2 (and physics professor Emil Martine) is right, increased 14 bit raw file sizes at ISO400+ don't pay their own way on the D3.

You can't give him heck for not posting an example (camera model is irelevant) and then give him heck for the example he posted all in the same post. At least use two differnt replies :)

Any image that shows data beyond 12-bits is bound to show subtle differences. If it were something obvious that just jumps out and says "boo!" there wouldn't be a discussion at all. And of course you have to jack the s--t out of an image to isolate the data. Saying that a 10EV push is extreme and not in the realm of normal processing is redundant.

You're just counting angels on the head of a pin... Iliah is saying there are 433 and you're saying that it's only 432 and 433rd one is not a real angel :)

And all this stemming from a thread about the obvious extra defects of more magnified files when viewed at 100% magnification!

Oh well, slow day at work...keep entertaining me.

--
http://fotoman99.smugmug.com/
 
Now post the 12-bit shot. You need both to demonstrate the difference
I think you're missing the point. That is the last bit of data, and it still has details, so clearly, no matter how small or how large, 14bits provides more info than 12bits.
 
ET2 wrote:
http://www.bythom.com/nikond300review.htm

There's no contest here, I'll take Thom Hogan's exhaustive tests and good advice against your endless pontification and fanboy rants, every time.
Thom Hogan has no scientific understanding on the topic. Even if D3 does benefit from 14-bit, surely it has to be only at the base ISO and at best ISO 200 ? Anything above that, and the last two-bits will have just noise..

Ask your hero Illiah about that.

I asked you to post an example from D3 at ISO 400 and above where you see a difference at ISO 400 and up.
I multiplied all values by 8192 on a D3 iso800 14bit raw file I had on my computer using Libraw library and I got the following image. Is that what you are asking?





--
Panagiotis
 

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