• UPDATE



    The forum will be moving to a new domain in the near future (canonrumorsforum.com). I have turned off "read-only", but I will only leave the two forum nodes you see active for the time being.

    I don't know at this time how quickly the change will happen, but that will move at a good pace I am sure.

    ------------------------------------------------------------

DXO uh-oh?

Sunnystate said:
There has to be a very good reason for that, i assume but I think who does not know what happened, and was following the tread should be informed. Thanks.

msm said:
Seems someones posts are missing from this thread, the entertainment is over :'(

Forum members can delete their own accounts and the member in question opted to do so. In that process a checkbox is presented (unchecked by default) for all of the user's posts to be deleted along with the account and the member apparently checked that box.
 
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unfocused said:
This conflicts with the whole idea of having ISO anyway (the "s" being for standardization). If it were different between film and digital, light meters, etc. wouldn't work properly.

You might think so, but in fact, they are governor by different standards (which is actually what the 'S' stands for, lots of different standards for lots of different things). ISO 6, ISO 2240, and ISO 5800 define speed for B&W negative, color reversal, and color negative film, respectively. ISO 12232 governs sensitivity for digital sensors.
 
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neuroanatomist said:
unfocused said:
This conflicts with the whole idea of having ISO anyway (the "s" being for standardization). If it were different between film and digital, light meters, etc. wouldn't work properly.

You might think so, but in fact, they are governor by different standards (which is actually what the 'S' stands for, lots of different standards for lots of different things). ISO 6, ISO 2240, and ISO 5800 define speed for B&W negative, color reversal, and color negative film, respectively. ISO 12232 governs sensitivity for digital sensors.
I did a metering comparison tonight... My Olympus OM-1, my Nikon FM, and my light meter all agree... They all date back to the good old days of film and film speeds are ASA numbers. On the test scene they all agreed at 1/400th of a second.

In the digital world, My 60D says 1/1000 sec, my Olympus E-510 says 1/800 sec, and my SX-50 says 1/1000. sensor speeds are ISO numbers.

I know ISO and ASA are supposed to be the same... but this is curious....
 
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dilbert said:
unfocused said:
dilbert said:
About 10 years ago I tried an experiment where I used the same speed settings on a film cameras as I had used on a digital camera. It didn't work - the film was exposed very differently to digital (I don't remember if it was under/over.) The ISO number that you get when you take a picture with your DSLR is not the same as the ISO number used for film. Try it for yourself.

That seems like a difficult experiment to conduct. There would be too many variables to use negatives and actually quite a few variables using transparencies. Did you develop the film yourself? What were the controls used to assure that temperatures, etc., were precise. If you sent the film to a third party to be developed, you lose all control over the process.

The process of developing film is standardised - C36 is "the process" that is used to develop colour film and it is the same process the world over. The only quality impact is the amount of dust that finds its way inside the machine and then causes "spots" on your prints. Differences in paper won't impact whether the print is dark or light due to under/over exposure.

Umm...this is plain and simply not true. I'm not sure where C36 came from. To my knowledge, today, there are two primary forms of color film processing: C-41 and E6. The former is used to process color negative film, while the latter is used to process color positive film (usually, slides or "transparencies".) C-41 and E6 are not the only two color film processes still in use.

There are a lot of film photographers out there who like to use expired and old films. They prefer the edgy, "old" or "roughed up" look, and for some, the worse off the quality of film, the better. A popular kind of older color film is Kodacolor, which was primarily developed using the C-22 process, however the even older Kodachrome used the K-14 process. C-22 is probably one of the more commonly used "old film" color processes still used today, as Kodacolor was pretty pervasive for a while, and a lot of old Kodacolor film is still out there, locked away in freezers and buried on old shelves. I believe there have been other processes for developing older Fujicolor film as well (CN-16, although I believe that may be compatible with the C-41 process). That is nothing to say about Polaroid Instant film, which used a different and instant development and immediate fixation process, and there are actually quite a number of people who would love to see the classic Polaroid instant film brought back (I believe there is even a group working on replicating the film and development/fixing process independently.)

There have been quite a number of color film processes over the decades, so to say that one single process is used to develop all color film is patently false. Not only that...I've never heard of C-36...searching for a variety of combinations of C-36, film, develop, process, fixing, machine, etc. comes up with nothing related to color film development (other than the tangential C-41, E6 and C-22 of course.)
 
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I thought it was pretty well known now that the indicated ISO speeds on digital cameras are not consistent even from model to model from the same manufacturer. So for example ISO 100 on a 6D is actually 80, on a 5DII it is 73, and on a 5D 92.

This can be confirmed with an accurate hand held light meter. Set the meter to 100 and you get an under exposure of one third to two thirds depending on the camera you are using.

We can thank DxO for this information.
 
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Sporgon said:
I thought it was pretty well known now that the indicated ISO speeds on digital cameras are not consistent even from model to model from the same manufacturer. So for example ISO 100 on a 6D is actually 80, on a 5DII it is 73, and on a 5D 92.

This can be confirmed with an accurate hand held light meter. Set the meter to 100 and you get an under exposure of one third to two thirds depending on the camera you are using.

We can thank DxO for this information.
I've noted the same. That means there is no comparing a dSLR to one shooting film nor even one dSLR to another. Most in depth testing I've seen shares this "cooking of the numbers" when it comes to most any advertized iso settings of camera bodies. This had led to many a thread where people wonder if something is wrong with their camera because it "always under exposes by 1/3 to 1/2 stop".
 
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Yuriy said:
Это видео резюмирует многое из того, что произошло между Никоном и Canon, D810 является гораздо более современные камеры, и Canon не может идти в ногу с развитием, потому что его старой технологии датчика

https://www.youtube.com/watch?v=VR7Kjeq2aH4

<google>This video sums up much of what happened between Nikon and Canon, D810 is a much more advanced camera, and Canon can not keep up with development, because his old sensor technology</google>
 
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ya, the d810's many little improvements make it a much better all-around camera than the previous 800s.
So now it certainly IS competition for the 5d3 in more types of shooting.

As for Tony's videos... I'm not a fan.
 
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Aglet said:
neuroanatomist said:
Aglet said:
So now <the D810> certainly IS competition for the 5d3 in more types of shooting.

Yet Nikon IS still predicting greater sales losses than Canon. Some competition... ::)

as long as SoNikon sell enough to stay in production and a step ahead I'm OK with that.
I don't own stock in any of them. :P

Edit: typo

Agreed. For some people, low ISO DR is critical, and for them it's good to have options.
 
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Sporgon said:
I thought it was pretty well known now that the indicated ISO speeds on digital cameras are not consistent even from model to model from the same manufacturer. So for example ISO 100 on a 6D is actually 80, on a 5DII it is 73, and on a 5D 92.

This can be confirmed with an accurate hand held light meter. Set the meter to 100 and you get an under exposure of one third to two thirds depending on the camera you are using.

We can thank DxO for this information.

So to accurately measure that difference your really need to use the same lens. Different lenses even if they are all F2.8 have different light transmission qualities. The F2.8 is not an exact standard of light transmission. For example an F2.8 prime will likely have better light transmission than an f2.8 zoom due to having less optical elements. This difference is measurable. The same holds for ISO measurements. If you are not testing apples against apples then you cant really make the claim that ISO varies significantly when it could be the optics that are skewing the results.

This is particularly true when comparing different brands and sometimes models within the same brand if they have integrated optics or different sized sensors.
 
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bdunbar79 said:
Besides, DxO mark isn't relevant. Despite them scoring Nikon/Sony higher and higher against Canon product head to head, Canon still went from a 4% market share lead 4 years ago to a now 20% market share lead. Nobody cares or nobody believes because of just that: The garbage "science" they are doing.

This particular argument always baffles me. How does correlating two entirely orthogonal things prove anything? If a scientist finds that sensor A is better than sensor B for some particular purpose, but sensor B sells 100x more, that somehow invalidates the scientist?

Wait, what now?
 
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jrista said:
arcanej said:
As DXO has given a near perfect score to the D810, they may have painted themselves into a corner. Their proprietary scale doesn't give DXO much room to heap hyperbolic praise on the next Nikon release.

http://nikonrumors.com/2014/07/24/nikon-d810-sensor-new-dxomark-leader.aspx/

This really isn't a surprise. DxO and Nikon are inseparably joined at the hip. Plus, all this really means, particularly the new 14.8 stops Print DR number, is that Nikon is cooking their RAW files EVEN MORE. Nikon/Sony's biggest "cheat" is the fact that they clip to black point, instead of offsetting to black point. Nikon cameras just throw away a lot of low-level signal information. The Sony Exmor sensor gives them more room to do that, for sure, but they are still throwing away information.

Canon, on the other hand, does not clip, they offset. So ALL the noise in the deep shadows of Canon's signal is still there (it's always there, in every sensor). Canon could probably achieve better results by using a more significant offset...and at times, as they have improved their sensor tech and increased their bit depth, they have changed their bias offset. It used to be 128 to 256 back in the 10-bit days, it was 512 to 1024 in the 12 bit days. I think it's 1024 or 2048 with 14-bit cameras.

The kicker is that RAW editors don't have to honor Canon's bias offset. The entire RAW signal is stored in Canon's files, and the offset is calibrated with a border of masked pixels. Who knows if editors like Lightroom, or DXO, or Aperture actually adhere to Canon's recommended offset. Even if they do, there is still negative signal information that can be pulled up, and the full noise signal is there. With Nikon RAW images...all that negative (deep noise) signal is simply discarded.

I use DeepSkyStacker and PixInsight to calibrate Canon RAW files for integration into a "stack". I use a 200-frame master bias image to subtract the bias signal from each light frame before integrating it. When the bias is removed from Canon RAW files, the dynamic range jumps by almost two stops...which puts it in the same range as Nikon files...

And still another way is to use magic lantern dual iso...which will enhance the DR of even an old canon camera...and its free. Would not spend 3500.00 on a new body just to get more low iso DR and a few more MP.
 
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StudentOfLight said:
I believe they use a benchmarking system. When a camera sets a new benchmark then it re-baselines the camera score database. If a camera sensor sets a new benchmark in all their metrics then I believe it will get a score of 100 and bump all the other cameras down to lower scores. I might be wrong, but I think that's how it works.

No that is not correct. The score is not limited to 100, cameras will score more than 100 and when they do it just means it is "better" than one that scored less. A difference of 5 points equals approximately 1/3 stop, so a camera scoring 102 is 1/3 stop "better" than one that scores 97.

But as they won't tell us how they equate those 5 points, or 1/3 stop, it makes it all pointless.
 
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Don Haines said:
The second thing you can't forget is that a camera is more than the sensor. While Nikon has been fixated on it's sensors, Canon has been fixated on it's focusing system. The end result is that the AF system on Canons is far more capable than on Nikons.... The people at Nikon are not idiots... you can bet that they are working on ways to counter this and that the next few rounds of their cameras will have better and better AF systems.

Well, this is a bit subjective - especially as I have yet to see a comprehensive AF accuracy test.

On the one hand, I agree - I still shoot with my 5D Mark III b/c the cross-type AF points across the frame are phenomenal. I have trouble understanding why Nikon hasn't released a camera with outer cross-type points.

OTOH, the lack of any sort of AF tracking across the frame in literally all of their cameras save for the 1Dx makes Nikon's '3D' AF tracking - available in almost all their DSLRs - stand out. When you're shooting at f/1.4 - where you can't focus & recompose - and you're trying to nail focus on, say, the eye of a baby that's constantly moving around, you'll fare much better with Nikon's 3D tracking than trying to manually move the focus point around quickly enough to capture the baby's eye at the moment of exposure.

But, of course, you'd probably fare even better with a 1Dx :) But, really, the 1Dx is not for everybody (far too big/heavy/expensive if you have no need for the vertical grip & the extra battery life). It's particularly not for me, and I'm growing out of my 5D III now as well, because of the lack of programmable Auto ISO and poor to no implementation of exposure compensation with Auto ISO.

As usual, there are always compromises to every system.
 
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neuroanatomist said:
Aglet said:
So now <the D810> certainly IS competition for the 5d3 in more types of shooting.

Yet Nikon IS still predicting greater sales losses than Canon. Some competition... ::)

With the D810, Nikon does actually have a competitive offering for "excellent general purpose DSLR" against the 5D III.

To be frank, I don't think Nikon's sales problems have as much to do with their cameras, as with their execution and branding. I think there were plenty of mistakes made with the D800 and D600, missteps with things like AF issues, oil spots on the sensor, misplacement of buttons, funky ergonomics decisions, etc. These are all execution factors...things that irk the crap out of their existing customers, and maybe cost a few customers here and there. Their other issue is their marketing...Nikon is schizophrenic when it comes to naming...their naming is wacko, and (assuming they stick with what they finally have now) they are only just now barely getting a handle on it. Nikon also has the tendency to expend resources on extremely niche items, like the Df, or a gold plated, lizard gripped trophy camera. Those things are just a waste of money and resource, and just drag town their capacity potential.

All of that, when you put it all together, just comes off as really sloppy. They used to be a fully integrated company, and I think they had some really excellent products when they were. They they trimmed off a bunch of parts of their company, made alliances with companies like Sony, and then just got...sloppy. They slap stuff together, hurriedly almost, like the Df. Interesting concept, but clearly designed and aimed at the die-hard retro fan. As a truly viable commercial product? It's a nitemare! The controls are horrid. It's clunky. I couldn't give a crap what kind of IQ it had, it could have 16 stops of DR and I wouldn't want to touch it with a 10 foot pole. Nikon comes off as sloppy...and I think that hurts them.

There is value to having DR for certain things. Sony Exmor sensors are better at that, no question. I don't think that's ever been at issue, at least not since the clear evidence of the facts first came out years ago. That's what the DRiveling Fanatics just don't get...like Dilbert in the recent discussion about print and dynamic range. He clearly seems to think that everyone always shoots at ISO 100, and therefor is always capable of taking advantage of the improvements to DR. (He also really doesn't know the difference between bit depth, information precision, and dynamic range, it's all the same thing, so he misinterprets everything.) He misses the point entirely, like so many other DR fanatics out there...they are looking through the ISO 100 lens, and they can't imagine the simple concept of anyone ever using anything else.

Nikon has a good product...their problem is executing, from a business and marketing standpoint, such that they can't maximize the potential of their product. THAT is why they don't have good sales. I don't think the D800 could have toppled the 5D III, however the D810 solves most of the D800's problems, boosts the frame rate, and is really a solid competitor now. It still doesn't have Canon's Mark II Great Whites, but the Nikon 800mm f/5.6 is practically a direct ripoff of Canon's fluorite lens designs...so it probably won't be that long before Nikon updates the 600, 500, and the rest to use the same general design. It still has the sensor IQ benefit on top of all that. If Nikon figures out how to get their act together, in the long run, Canon (assuming they don't do something about their sensor IQ within the next couple of DSLR releases) is going to start losing customers. It really doesn't matter if the differences are huge, minor, or non-existent...all that matters is the PERCEPTIONS of existing or potential customers. A lot of people don't give a crap about Canon glass (or Nikon glass, for that matter)...the prefer Zeiss or Sigma. A lot of people don't give a crap about the 600RT, they already have a third party system they are happy with. A lot of people never shoot at high ISO...they use nothing but ISO 100 and shoot nothing but landscapes.

It seems impossible, and I think Canon is an excellent company with excellent products and execution. But the dominant company has failed in the past. Microsoft used to be one of the most profitable companies in the world, the single most profitable tech company in the world, and was at the pinnacle of the tech world. No one saw the Apple underdog with their iOS and iPhone coming. I still use Microsoft products myself (I gave Apple products a multi-year trial, and still really can't stand them), but there is no question that Microsoft tried to ride their past success for too long. Today, they are, by many, considered to be entirely irrelevant. They still exist, they still make great products (better products now than they had for over a decade, even), but they lost their status as the top tech company. If they hope to turn that around, it's going to be a very long, hard, expensive journey, and there is no question it will take a new CEO and probably an entirely new mindset to do it. Apple rakes in more revenue in a single quarter than Microsoft does in three or four quarters now. The underdog took over...and in a lot of respects their products are still inferior to the competition...they just have one feature no one else has: a gazillion apps. (Oh, and, a lot of sapphire...)

That's all it takes...that one feature. I don't think the DR difference is all that it's cracked up to be. We had a guy on the forums for a short while back who really laid into Neuro, kicked up a lot of dust and started a big old fight, then deleted his account. He completely ignored actual real-world evidence I provided that demonstrated how little the dynamic range difference actually means in actual practice in all but a select few unique shots. (I even pointed him back to it a couple times, and he still ignored it.) It doesn't matter how significant the difference is, it doesn't matter how often it can be used (I still believe that the majority of photographers use higher ISO settings.)

All that matters is the perception. Outside of CR and a couple forums on DPR, the perception is that Canon has LOST. Past tense. That's a really BAD place for a company to be in. I like Canon. I think overall they make a better product, just like I think the Nokia Lumia is a better product than the iPhone. I think their system overall is better...better lenses, better flash, better ergonomics. But it doesn't matter. It doesn't even matter if it is Nikon that's the underdog...technically speaking, it isn't just one underdog this time...its a horde of unerdogs, all barking the Sony Exmor midnight song...marching on Castle Canon like a bunch of hellhounds. Canon is now perceived, by a growing number of photographers and a growing number of reviewers as having bad sensor IQ and crappy sensors. It's pretty much the only thing I hear or read anymore...everywhere you go on the net, there is a horde of Canon haters and a small cluster of Canon defenders duking it out...and the Canon haters are growing by leaps and bounds. Even the Canon holdouts and die-hard fans all probably "secretly" want D800 level IQ in their Canon cameras, regardless of what they may say publicly. Canon has to address that. Soon. Either with the 7D II, or with the 5D IV. If they do not, they will eventually become as irrelevant in the digital photography world as Microsoft did in the tech world. Their competitors aren't stopping or slowing down...they just keep marching on. Nikon could probably go bankrupt even, and it probably wouldn't matter. Sony Exmor sensors are finding their way into everything. And Sony keeps improving Exmor...it hasn't just been a stagnant sensor design since the D800 was introduced. Soon, Canon won't just be facing Nikon and Sony as competitors...it'll be nearly every other camera manufacturer on the planet, in every segment of the market. It won't happen suddenly, it won't happen in a year, but they will go into decline unless they step up their game and compete on the sensor IQ front. Everyone wants Canon to make a better sensor. I DO MYSELF! AND I KNOW THEY HAVE THE PATENTS AND TECHNOLOGY TO DO IT, TOO!! And yet...they simply...aren't....
 
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