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Archive 2015 · Interesting Reference Data on Dynamic Range - 5dsr

  
 
ggreene
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p.4 #1 · Interesting Reference Data on Dynamic Range - 5dsr


If I'm a new member looking at that D750/5DsR comparison I'd have to be shooting +6EV for a large percentage of my work to overcome the lack luster IQ at 0EV and +2EV.


Aug 17, 2015 at 06:39 AM
RustyBug
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p.4 #2 · Interesting Reference Data on Dynamic Range - 5dsr


+1 @ Greg ^

There's an old saying that goes something like:

"Keep the main thing, the main thing."

If a person's shooting style is such that their main thing is working in the land of extreme underexposure ... then the +6 stops might matter to them more than the quality of their images @ +0 through +2 push (-2 under). Yet, it strikes me even odder, that an advocate of such extremes has a self-imposed standard of 2 EV target range for IQ purposes (even 3EV is quite diff from 6 EV). I mean, at what point do you commit to staying on base ISO and + 6 stops lift vs. a change in ISO. Each has a penalty, and I'm inclined to think that base + 6 and lift may not always be the winning combination.

However, I tend to think that in the vein of keeping the main thing, the main thing ... the main thing is to achieve your PRIMARY / KEY exposure to within +/- two stops, the tighter the better (as we see in the comp) . If your particular scene has FILL areas that are then below your liking ... add more light to your fill areas.

For landscapers ... the only real way to add more light to the fill areas, is shoot a second image so that the fill areas receive more light via aperture, shutter, ISO ... OR ... since you are on the tripod, (come early or stay late) shoot the fill areas at a different ambient level. The latter approach addresses the much argued motion / wind of too slow a shutter speed (and is often overlooked as a viable approach).

A bump of 1-2 EV (or more) in ambient, along with a bump in 1-2 EV of ISO, can give you a 2-4 EV increase in your fill areas for which to work from. Recalling that the dialogue is "Max IQ", waiting for your fill lighting to change is no different than taking the time in studio to make (or wait for others to make) a lighting adjustment. Max IQ for an image ... imo, is not achieved by 6 stops underexposure and lift.

But, it just strikes me that when the dialogue includes "max IQ" that folks would still lean on +6 EV pushing of their shadows rather than put more light on their fill areas. This just doesn't make sense to me ... IF ... "max IQ" is truly your goal. I'm hard pressed to imaging a landscape scene where the fill areas for landscape images are substantially (physically) moved 20 - 40 minutes earlier / later than when you capture your dramatic key lighting. Does that mean that camera is stuck in one place for a bit longer ... yup.

However, that same 20-40 minutes can readily be more than a stop of additional light on your fill areas (depending on time of day being within 90 minutes of horizon in golden / blue hours). I mean, even if you have to wait an hour or more to get your fill light where you want it, if your goal is truly max IQ ... just sayin.

Is it more convenient to take a single shot and lift the fill areas +4, +5, +6 or +1,000 stops ... sure, but if the true goal is "max IQ", keeping things tighter @ more light seems to me as the way to go in far more instances than folks may have previously considered.

But, even if you still don't want to bracket (which is certainly fine), for those who use their cameras for far more than these extreme scenarios ... the main thing for them, is more likely to be in the 0-2 range, vastly more often than being in the "6 and lift" scenario.

As such, there is always going to be a variable relationship balance between "keep the main thing, the main thing" and "choose your poison(s)". Which, is why there will always be horses for courses ... of for some folks, unicorns for universes.





Aug 17, 2015 at 07:36 AM
KKFung
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p.4 #3 · Interesting Reference Data on Dynamic Range - 5dsr


OK, back to the main thing of this post - 5DsR

Just dig out some actual usage DR file and let review this camera capability in a new member hand

Original exposure
1G5A0871-2 by KK Fung, 於 Flickr

100% crop of "some where"
1G5A0871-4 by KK Fung, 於 Flickr

After shadow push and PP
1G5A0871-3 by KK Fung, 於 Flickr

Whole picture after PP
1G5A0871 by KK Fung, 於 Flickr

Other DR sample

Original exposure
1G5A0867-2 by KK Fung, 於 Flickr

After PP
1G5A0867 by KK Fung, 於 Flickr

Original exposure
1G5A0855-2 by KK Fung, 於 Flickr

After PP
1G5A0855 by KK Fung, 於 Flickr



Aug 17, 2015 at 08:40 AM
KKFung
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p.4 #4 · Interesting Reference Data on Dynamic Range - 5dsr


RustyBug wrote:
KK ... you know you can't possibly make images like that without using a Sony's extra DR.


I know, some of friends keep telling me I bought a wrong camera for landscape shoot



Aug 17, 2015 at 09:29 AM
RustyBug
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p.4 #5 · Interesting Reference Data on Dynamic Range - 5dsr


Just to be sure (and fair) that folks might understand ... can the extra DR "save the day" in extreme situations. Sure, why not.

But, if our goal for an image is KNOWN to be shooting for max IQ of an extreme situation ... there is a diff between a convenient "save" and working for "Max IQ" ... and we can (many times) take an extreme approach (i.e. bracketing, waiting for more fill light, etc.) toward an extreme situation to work toward our desired "Max IQ" results. Of course, if we prefer to lift 6 stops, that's one approach as well.

I guess my definition of "Max IQ" and the efforts to achieve such are diff from those who advocate lifting 6 stops from a single frame (understood that it happens to be necessary on rare occassion) rather than exposing differently for different portions of the scene. Diff strokes for diff folks ... I just don't subscribe to the notion of more DR as the holy grail to all photography. Nor do I subscribe to the notion that bracketing is the holy grail either. But, if the penalty for more DR looks like the comp in the 0-2 EV range, that's a tradeoff that (as Chez has pointed out aspects "for him") "for me" isn't one that I find attractive.

Simply stated, "There is no holy grail." That goes for DR, ISO, bracketing, MP or any other attribute of our beloved craft.



Edited on Aug 17, 2015 at 09:49 AM · View previous versions



Aug 17, 2015 at 09:35 AM
jctriguy
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p.4 #6 · Interesting Reference Data on Dynamic Range - 5dsr


RustyBug wrote:
So the comps in the 0-2 EV were better in the Nikon than the Canon?

I can respect and appreciate you (or others) to ALWAYS have a PREFERENCE ... but does that truly make it always better? Is it a tradeoff you willingly accept ... that also is a YMMV. I'm good with that. Just that purporting more DR (or higher ISO) as the holy grail of photography for everyone to bow down to is a bit of a ... now, how'd you say it?



Depends if we are in the real world or the world of make believe. In the real world, there is always a compromise. No single camera does everything well. Chez is always the first to point this out and explain his 8 or 10 different camera options. No one here is saying that they want canon to reduce DR or purposely give them a camera with 8 stops when they are capable of 10stops. That is a ridiculous argument that some seem close to suggesting. It seems unbelievable to some people that it is actually possible to understand the pros and cons of each system and make an educated decision that is different than their own decision.



Aug 17, 2015 at 09:37 AM
KKFung
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p.4 #7 · Interesting Reference Data on Dynamic Range - 5dsr


For sure to get max IQ is to bracketing, just like fill flash in portrait shoot is always necessary even the photographer using a camera with extra DR because he/she know more the pushing of the skin tone will lead to more the CG look in result.


Aug 17, 2015 at 09:44 AM
chez
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p.4 #8 · Interesting Reference Data on Dynamic Range - 5dsr


jctriguy wrote:
I'm exploring some of your views on the topic of DR. I think it is completely within the context of the recent discussion that you waded into. But thanks for telling me how to respond to you :-)

There is a big difference between more DR being better and deciding to choose a camera with more DR. I'm sure everyone would be happy with a canon that had 14 stops of DR. That isn't reality, so people look at the actual existing options. Selecting a camera based on the outrageous info in some posts would be a mistake. Exactly opposite of
...Show more

Well, I chose the A7R because of its DR and extra pixels. Using it, I found the other two major enhancements for me were its size and weight and its great ability to manual focus. Those 4 things combined today are not available from Canon...so yes, looking at features that I need ( don't care about others ), the combinations of these features including the best DR for my landscape photography led me to purchase the A7R.

Like I've stated before, more DR abilities is ALWAYS better than less...just like having clean high ISO images is ALWAYS better than not being able to shoot high ISO. You don't always use these features, but when you need to, having the feature saves your bacon versus not having it. Simple as that.



Aug 17, 2015 at 09:57 AM
gdanmitchell
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p.4 #9 · Interesting Reference Data on Dynamic Range - 5dsr


First...

It is hard to think of too many situations in which "X is always better than Y" or "More X is always better than less X." Perhaps it could be accurate to say, "If all else is equal, X is always better than Y, or more X is better than less X." In the real world — including the world of cameras — all else is rarely if ever equal, and that is the main issue here, I think.

And...

Examples contrived to show how crappy the thing that the other guy uses are so tedious, especially when dropped regularly and voluminously into discussions about the "other guy's" thing. I appreciate KKFung's real world examples of how this thing works a lot more than someone else's examples designed to suggest that someone else's thing suck badly.

(For the umpteenth X 100 time, all of the cameras being compared here — Sony, Nikon, Canon, etc. — are fine tools and reasonable, smart people could select any among them for their photography and use them to do brilliant work. I'm completely NOT interested in telling folks who use a different brand than I do why they are fools for not selecting "my" brand.)

Here, again, is one of my examples, with a link to more information for those who might be interested:

- - -

I updated an article at my website that includes a couple of examples of very underexposed 5DsR images from which deep shadow details have been recovered. If you are interested... http://www.gdanmitchell.com/2015/07/19/the-canon-5ds-r-dynamic-range-examples

Nearly black deep shadow section of a 100% crop....

http://i2.wp.com/www.gdanmitchell.com/wp-content/uploads/2015/07/CropPreEdit.jpg

... becomes...

http://i2.wp.com/www.gdanmitchell.com/wp-content/uploads/2015/07/cropPostEditNRSharp.jpg

details in the article

- - -

Then...

dugaut wrote:
I'm a math teacher and I loaded up the DR graph with 5dsr, pentax 645z, d4/s, d800/810, 5dmkiii, phase one iq250, canon g1x, sony a7rii. I'm always leery when so much data gets crunched into a single graph.

It's great to see the differences on the graph but ability with camera, planning , execution of the plan, and post-production make the differences I see in the graph less profound....


To keep spinning the broken record (after thanking you for your perspective), camera selection is a rather subjective thing and it is typically made on the basis of a range of tangible and intangible elements.

In the end, for most photographers who think a lot about how particular gear options relate to their particular photographic needs, the choice (or choices) cannot be made on the basis of one primary factor only. We would all love it if some camera manufacturer designed the absolutely perfect camera for each of us that had exactly the feature that we individually desire, but the reality is that while Camera A may get closer to our ideal in one respect, Camera B may get closer in another. On top of that, Camera C may come out that beats A and B in some way, but falls short in others.

So we look at our photography, at all of this tangible and intangible factors, and we select the imperfect gear that best fits our needs/desires.

I suspect you are referring to the comparative dynamic range curve graph of a whole list of cameras that was shared earlier. I also plugged in a bunch of cameras whose performance interests me — the major full frame DSLR and mirrorless cameras, the Fujifilm mirrorless cameras (since I own one), the 645z (since I considered getting one at one point, and still haven't ruled it out for the future), the Phase One backs (good friends use them), and more.

Clearly there are differences in DR (and some other things) that are visible in the chart. But even if DR is your only decision point (not likely!), it isn't clear which camera one would get based only on the chart data.

In the end, most people will likely agree with what most people here say: Increases in DR and other camera capabilities are a fine thing and always welcome as long as they don't diminish performance in other areas. Ultimately, there is no single "right" choice of camera, and each photographer has to figure out how the various factors play into his or her choice.

My view is that most — but not necessarily all — photographers trying to make a selection between brands and models will be well served by trying to weight their decision toward that larger range of camera characteristics and away from any single characteristic... and then to get on with it, get almost any one of the current fine cameras/brands that meets their functional needs, and focus on making pictures.

jctriguy wrote:
There is a big difference between more DR being better and deciding to choose a camera with more DR. I'm sure everyone would be happy with a canon that had 14 stops of DR. That isn't reality, so people look at the actual existing options. Selecting a camera based on the outrageous info in some posts would be a mistake. Exactly opposite of the stated goal of some users here that want to educate the new forum members. Cutting through the hype is hard. People show images of pushed shadows at +6 and they all look like shit. Some ask,
...Show more

Yup. Pretty much exactly yup.

YMMV,

Dan

Edited on Aug 17, 2015 at 10:25 AM · View previous versions



Aug 17, 2015 at 09:58 AM
chez
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p.4 #10 · Interesting Reference Data on Dynamic Range - 5dsr


RustyBug wrote:
Just to be sure (and fair) that folks might understand ... can the extra DR "save the day" in extreme situations. Sure, why not.

But, if our goal for an image is KNOWN to be shooting for max IQ of an extreme situation ... there is a diff between a convenient "save" and working for "Max IQ" ... and we can (many times) take an extreme approach (i.e. bracketing, waiting for more fill light, etc.) toward an extreme situation to work toward our desired "Max IQ" results. Of course, if we prefer to lift 6 stops, that's one approach as
...Show more

But there are situations where shooting multiple images is not feasible such as street scenes that posses high dynamic range. This is where you either produce a lower quality image with either blown highlights or muddy dark shadows or you have a camera that can expose for the highlights and lift the shadows. So in these situations which I have run across, having a higher DR capable camera will produce the better high quality image.

It's a tools to be used like any other tool. You always post extreme examples of pushing 6 stops...but I've shot with the 5D2 and the A7R and I know the differences of what can be pushed and what cannot with degrading the image and I can tell you it is a lot that 6 stops that will show you a difference.

Oh...and who is claiming there is a holy grail? There is a reason I own 7 cameras as I have not discovered 1 camera that does it all.



Aug 17, 2015 at 10:01 AM
ggreene
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p.4 #11 · Interesting Reference Data on Dynamic Range - 5dsr


KKFung wrote:
For sure to get max IQ is to bracketing, just like fill flash in portrait shoot is always necessary even the photographer using a camera with extra DR because he/she know more the pushing of the skin tone will lead to more the CG look in result.


Definitely agree here. Pushing shadows (especially faces under helmets/visors) in bright light is where I could use the extra DR. Problem is most of the samples I've seen from higher DR sensors have horrible skins tones when pushed so while it's possible it still doesn't look very good. Better to just use some fill flash (if allowed) or look for viewing angles that minimize the deeper shadows.



Aug 17, 2015 at 10:04 AM
KKFung
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p.4 #12 · Interesting Reference Data on Dynamic Range - 5dsr


Here is an example I experience in the past using the A7r

exposure on the skin tone, highlight clipped and can't be recovered
_DSC9279 by KK Fung, 於 Flickr

ETTR, highlight on the table can be recovered but the skin tone can't be corrected
_DSC9281 by KK Fung, 於 Flickr

So, in real world, even using A7r, I still need a fill flash to get max. IQ



Aug 17, 2015 at 10:17 AM
gdanmitchell
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p.4 #13 · Interesting Reference Data on Dynamic Range - 5dsr


If higher DR is always better, why would anyone own and shoot with anything but the one camera that has higher DR. That camera is always better, right? ;-)


Aug 17, 2015 at 10:27 AM
RustyBug
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p.4 #14 · Interesting Reference Data on Dynamic Range - 5dsr


+1 @ YMMV

My point was that the limited DR of chrome had qualities to it that were favored over DR by ... IDK, millions of folks. Conversely, millions preferred the DR of negative print film.

YOU may ALWAYS favor more DR. There is countless historical evidence that more DR is not ALWAYS BETTER. I mean, just in case you never heard of it, there was this film called Kodachrome and there were one or two folks that liked it. Funny thing ... they paid more for it and got less DR than they could from negatives. Surely, folks that took images for Nat Geo, etc. would ALWAYS want more DR because more DR is ALWAYS better ... isn't that right?

Diff courses, diff horses.

So, how about those 0-2 EV comps? Did the extra DR make them ALWAYS BETTER?

Edited on Aug 17, 2015 at 10:34 AM · View previous versions



Aug 17, 2015 at 10:29 AM
alundeb
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p.4 #15 · Interesting Reference Data on Dynamic Range - 5dsr


gdanmitchell wrote:
If higher DR is always better, why would anyone own and shoot with anything but the one camera that has higher DR. That camera is always better, right? ;-)


I think it was meant to be with everything else being equal.

Anyway, as with everything else, there is a point at which something is good enough most of the time. I think we agree Dan that the dynamic range of the 5DS R is enough most of the time for you and me. We did disagree about the 5D II, I was more negative regarding the DR of that camera than I recall you were. The point now is that the 5DS R is actually improved in several ways over the 5D II, not only resolution. The improvement makes the excellent DR of Sony sensors of relatively less importance to me now. Other people may have different breaking points where they think it is good enough most of the time.


Edited on Aug 17, 2015 at 10:38 AM · View previous versions



Aug 17, 2015 at 10:37 AM
jctriguy
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p.4 #16 · Interesting Reference Data on Dynamic Range - 5dsr


RustyBug wrote:
+1 @ YMMV

My point was that the limited DR of chrome had qualities to it that were favored over DR by ... IDK, millions of folks. Conversely, millions preferred the DR of negative print film.

YOU may ALWAYS favor more DR. There is countless historical evidence that more DR is not ALWAYS BETTER. I mean, just in case you never heard of it, there was this film called Kodachrome and there were one or two folks that liked it. Funny thing ... they paid more for it and got less DR than they could from negatives. Surely, folks that took
...Show more

I suspect there are two different discussions happening here. One is an artistic discussion about what makes a good looking photograph. The other is a technical discussion about whether or not extra DR stored in a file is useful. It is a different discussion than the film days since we can essentially change film after the exposure. You can get high DR or low DR from the same file. So, in that aspect, I agree with chez. If extra DR comes with no compromise, I'm sure most would agree that is a good thing to have stored in the files even if you never use it. Since things never come without compromise, it is a much more involved discussion of individual wants/needs.

Edited on Aug 17, 2015 at 10:46 AM · View previous versions



Aug 17, 2015 at 10:43 AM
gdanmitchell
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p.4 #17 · Interesting Reference Data on Dynamic Range - 5dsr


jctriguy wrote:
No one is disputing your right to pick the camera gear that satifies your needs. However, you and several others, seem to say that people who don't pick DR as a main factor just don't understand the technology and don't understand IQ. You make similar claims about weight and MF abilities, trying to tell people that they just don't understand how much better a Sony body is compared to Canon. This is a very experienced crowd here, most of us can make our own informed decisions...


+100

alundeb wrote:
I think it was meant to be with everything else being equal.


If so, that would be a statement that virtually anyone would agree with. I certainly do and have said so many times.

I also would not and have not disagreed with your general point about people coming to different decisions about what is best for them — in fact that has long been one of my mantras about this stuff. I'd bet that the majority of folks in these discussion would agree that a) DR is one of several performance parameters to consider, b) "if all else is equal," having more DR is a fine thing, c) various photographs have intelligent and legitimate reasons for selecting different kinds of gear.

Done and done. Or not.

I think virtually all of us are fine with someone deciding to get some camera because they weight DR more heavily than we might or because they already own lenses that work with it or because they like the way it handles or because they got a deal on one or because it works really well for their photography or because they wanted to try it out or...

I know I am.

But we're almost all very all tired of a few who have a constant need repeatedly to tell us a) why their choice is the best, right, or only smart choice, and b) why those making a different choice are foolish, ignorant, fanboys and all of the other things that they either imply or name explicity*, c) how we could be better people, and d) among whom there are a few who characterize other points of view as "trolling," etc.*

Does the distinction make sense?

Dan,

* a.k.a. "AZZ"

Edited on Aug 17, 2015 at 11:23 AM · View previous versions



Aug 17, 2015 at 10:52 AM
RustyBug
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p.4 #18 · Interesting Reference Data on Dynamic Range - 5dsr


jctriguy wrote:
I suspect there are two different discussions happening here. One is an artistic discussion about what makes a good looking photograph. The other is a technical discussion about whether or not extra DR stored in a file is useful. It is a different discussion than the film days since we can essentially change film after the exposure. You can get high DR or low DR from the same file. So, in that aspect, I agree with chez. If extra DR comes with no compromise, I'm sure most would agree that is a good thing to have stored in the files
...Show more

+1 ... the comps show a compromise in the EV 0-2 range.
(Still not acknowledged by some.)

IF ... IF ... there truly was no compromise, then the "more is better" aspect has merit. However, it does come with a compromise that is rather evident to some. The reference to Kodachrome was merely to point out that DR itself, isn't the only attribute toward achieving superior IQ. Foregoing some of those other attributes isn't something that ALWAYS makes for a better image, just because more DR is available.

The aspect of "it cuts both ways" is one that, well ... cuts both ways. Some folks readily acknowledge that, others not so much. How much it matters to a given individual, for a given shooting style ... horses for courses.



Edited on Aug 17, 2015 at 11:01 AM · View previous versions



Aug 17, 2015 at 10:52 AM
mttran
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p.4 #19 · Interesting Reference Data on Dynamic Range - 5dsr


DR is the only variable that senses the base noise and the only indicator to show how well the sensor and underneath IC can swallow one BIG data without choking. The lesser the noise the silky image will be. When we talk about image quality, that is the ONLY best measurement for your wallet. Of course everything else matter as well but all depend on your requirements.

Wider DR cam yields huge saving time for both handheld and tripod shooters to collect BIG data, period. We can run around the circle to debate whatever to make our image better but bottom line end of the day whatever came out from the sensor counts.

Edited on Aug 17, 2015 at 11:33 AM · View previous versions



Aug 17, 2015 at 11:19 AM
darbo
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p.4 #20 · Interesting Reference Data on Dynamic Range - 5dsr


Hypothetical 1: If Canon made two otherwise identical 50.6 MP cameras, but one had a 12.4-stop DR and the other a 14.8-stop DR, I'd pick the latter model.

Hypothetical 2: If Sony had an a7R II that was equal or better at AF to the 5DS/R; had native equal or better 11-24mm, 24-70L II, 100-400L II, Otus 55mm, and Apo Sonnar 135mm; had equal or better customer support system; had equal or better non-lossy raw files; had equal or better build quality, etc., then I would dump Canon and go with Sony.

[Note: The above are stand-alone statements of my personal preference and are not made to counter or support any other statements made by others in this thread.]

Edited on Aug 17, 2015 at 11:45 AM · View previous versions



Aug 17, 2015 at 11:31 AM
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