Canon 6D Under-Exposing?
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rpt said:
Agreed.. the Nikon looks a little washed out compared to the 6D.. probably due to less contrast. But the 6D underexposed compared to D600 in this picture. If you look at the bottom of the images at the camera or the shadow around the front of the car. There is virtually no shadow between the car and book (brighter) and the camera black accordion area is more pronounced on the D600. Either the Nikon overexposed or the Canon is underexposed or perhaps DR?
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Not that the 6D is on equal footing as the old 400D, or 350D...
But both of those cameras had some exposure "issues" as delivered.
I just sent mine in for adjustment, which they did at no charge (on my old 400d).
I just said - turn it up a half stop. It came back turned up a half stop.
:-\
But both of those cameras had some exposure "issues" as delivered.
I just sent mine in for adjustment, which they did at no charge (on my old 400d).
I just said - turn it up a half stop. It came back turned up a half stop.
:-\
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Ok, the author of the original article is getting some strange results (and we may actually get to blame this on Nikon - I'm not a fan boy, but hey this is CR 
).
I'll quote the interesting part here:
It looks like the D600 may be unusually sensitive (comparied to the D800, 5D2/3, and 6D). I'm still blaming the jpeg engines (likely Nikon's d600 engine) for this strangeness however. Have to wait until he posts some RAW images, or someone else does this test to be sure though.
The lens he is using could also be an issue, but generally the T-stop difference shouldn't be much between similar lenses.
). I'll quote the interesting part here:
Source: http://www.borrowlenses.com/blog/2012/12/is-the-canon-6d-under-exposing/ (Post Update)
It looks like the D600 may be unusually sensitive (comparied to the D800, 5D2/3, and 6D). I'm still blaming the jpeg engines (likely Nikon's d600 engine) for this strangeness however. Have to wait until he posts some RAW images, or someone else does this test to be sure though.
The lens he is using could also be an issue, but generally the T-stop difference shouldn't be much between similar lenses.
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PVS said:
Strange thing, however they should use an external meter as reference no a camera's one. I sell my 5d2 but I think it underexposed in similar way that 5d3 (-1/3 - 2/3)...I did not have D800 but it should work like other Nikons. However the test you've posted shows ineed a the different conclusion.
Please make a simple test-take few Nikon DSRLs, Canon, and ie. Sekonic Lightmeter-check the metering on ie. white wall-the histograms will be completely different in terms of exposure (histogram peak). I checked it some time ago with 2x5d2, 5d3, d70, d90, d300, d700 and sekonic. When I switched to Canon and just thought that my camera's meter was broken, cause I was used to brighter images in standard exposure. Nikon/Sekonic were ideantical giving a histgoram peak in center. Canon's peak were biased to the left ( ca. -2/3 or -0,5 EV).
A also found that there are some lens which gives a perfect exposure for my bodies - 85mm 1.8. The histogram peak was perfectly in center. All my other lenses gives different results. Why? No idea, aperture maybe ?
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skitron said:
I know this is an old thread, but...
I just ran my 6D through the paces this past weekend on a few event gigs, and found (with identical settings to my 5D3) that it indeed underexposes... by quite a bit! To get things in line, I had to run my exposure compensation between +1 and +1.6 EV. This gave me results that were consistent with my 5D3.
Is there any update on this from Canon? Firmware update, etc.?
I find it curious that this is appearing to be a repeatable issue out there amongst 6D users.
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They've updated this article. It was actually a problem with the Nikon D600 over-exposing (aperture issue, nothing to do with JPEG), and the Canon was fine.
I own a 6D and have had no problems with exposure. Since I prefer the 'expose to the right' method I find that pretty much any digital camera exposes a little darker than I would like, and I set exposure compensation accordingly.
I own a 6D and have had no problems with exposure. Since I prefer the 'expose to the right' method I find that pretty much any digital camera exposes a little darker than I would like, and I set exposure compensation accordingly.
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justsomedude said:
If a slight underexposure should be the case: the 6d is also marketed for travel/tourism which implies a lot of jpeg/daylight use, so protecting people from blown highlights seems reasonable while people using the "pro" 5d3 are probably expected to know what they're doing and shoot raw so you can recover the highlights.
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I think it gotta do with the lens. Using my m42 lenses in AV mode sometimes the exposure is just...so off.
Never had any problems with the newer EF lenses
Never had any problems with the newer EF lenses
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GMCPhotographics
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Martin said:
The Canon metering system has always been slightly over sensitive to bright highlights. Fair comparisons to metering can only be made with grey test scenes and controlled lighting. But the metering isn't always linear or compatible to other camera systems. I've found my 5DIII's to be the most stable of metering on a Canon system yet, My 5DII cameras had a similar metering system to the older 5D cameras, but rendered images which were slightly brighter due to the higher 14bit output of the 5DII.
I tend to use fast primes so my iso values are generally quite low. I like my images to have a slim DOF and low noise.
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I'm so glad to read this string. I've experienced what I thought was underexposure with my 6D as well....never had the problem with my 7D.
Is anyone have a white balance problem with interior shots? Even when I set the white balance to tungsten on some shots, they come out yellow/orange-ish. Exterior shots seem to be fine.
Is anyone have a white balance problem with interior shots? Even when I set the white balance to tungsten on some shots, they come out yellow/orange-ish. Exterior shots seem to be fine.
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I've found various bodies to expose with various levels of error, no real surprise.
What I find more annoying tho, is an inconsistent error on any given body.
E.G.
new Pentax K52s with fast zoom and sunlight.
- matrix metering is within 1/3 of Sekonic
- CWA and Spot on the same uniform surface are -1EV from matrix
I thot this may be due to the effect of lens corner shading in matrix EXCEPT that if I move to an indoor location, again on a smooth surface evenly lit by natural outside light thru windows, all metering modes are now the same result!
FWIW, my K52s underexposes considerably and inconsistently when outdoors in sunlight, no matter what metering mode I use and even sunny-16 numbers do not provide proper results but are often nearly 2 stops under... I need to get that thing checked out... I can usually rely on full manual giving consistent results but I have to go by the histogram as the metering's too wonky. Same behavior with various lenses so not sure what its problem is yet, aperture control lever calibration?.. Have to find some time for detailed testing.
Meanwhile..
My D800 does the same -1EV shift in sunlight when changing between metering modes as the K52s but its matrix mode does a very good job for all my shots and rarely under or over exposes by much in complex scenes and is predictable in low dynamic range shots.
My old Canon 5d2 often underexposed a great deal and again, inconsistently. It occasionally over exposed a scene grossly too, even with no change of scene and from shot to shot. Manual was the only way to get consistent shot-to-shot results.
my 60D and 7d gave remarkably accurate and consistently good metering (&WB) and also agreed very well with my Sekonics or sunny-16 when in manual. 40d gives consistent and predictable metering, even if not accurate.
All my consumer grade bodies, Canon and Nikon, actually seem to meter quite predictably and consistently, if a little conservative at times so they rarely clip highlites or underexpose by much.
So... not surprised to hear that a 6D underexposes a bit.
But how consistent is it between metering modes and various light levels? and shot-to-shot on the same scene?
What I find more annoying tho, is an inconsistent error on any given body.
E.G.
new Pentax K52s with fast zoom and sunlight.
- matrix metering is within 1/3 of Sekonic
- CWA and Spot on the same uniform surface are -1EV from matrix
I thot this may be due to the effect of lens corner shading in matrix EXCEPT that if I move to an indoor location, again on a smooth surface evenly lit by natural outside light thru windows, all metering modes are now the same result!
FWIW, my K52s underexposes considerably and inconsistently when outdoors in sunlight, no matter what metering mode I use and even sunny-16 numbers do not provide proper results but are often nearly 2 stops under... I need to get that thing checked out... I can usually rely on full manual giving consistent results but I have to go by the histogram as the metering's too wonky. Same behavior with various lenses so not sure what its problem is yet, aperture control lever calibration?.. Have to find some time for detailed testing.
Meanwhile..
My D800 does the same -1EV shift in sunlight when changing between metering modes as the K52s but its matrix mode does a very good job for all my shots and rarely under or over exposes by much in complex scenes and is predictable in low dynamic range shots.
My old Canon 5d2 often underexposed a great deal and again, inconsistently. It occasionally over exposed a scene grossly too, even with no change of scene and from shot to shot. Manual was the only way to get consistent shot-to-shot results.
my 60D and 7d gave remarkably accurate and consistently good metering (&WB) and also agreed very well with my Sekonics or sunny-16 when in manual. 40d gives consistent and predictable metering, even if not accurate.
All my consumer grade bodies, Canon and Nikon, actually seem to meter quite predictably and consistently, if a little conservative at times so they rarely clip highlites or underexpose by much.
So... not surprised to hear that a 6D underexposes a bit.
But how consistent is it between metering modes and various light levels? and shot-to-shot on the same scene?
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Good to hear the 7D2 is reliable and accurate. That's going to keep a lot of people happy in the future
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