Faulty 6D? Overexposed images, high noise etc..?!

No, I haven't experienced that at all. Can you post a sample of it? Just to see?

photo just for test purposes only, (probably not the best phot to use in this instance)

ISO 100 yet has noise as if it was in the 1000's. Was using auto focus at this point (centre focal point) yet image is not focused. It is a mystery! Every person i have spoken to have never had a problem with 6D.

The 6d has more of a tendency towards under exposure then anything else. I would return it to the store rather than have Canon monkey with it. It sounds like a lemon.

LeahKate said:

photo just for test purposes only, (probably not the best phot to use in this instance)

ISO 100 yet has noise as if it was in the 1000's. Was using auto focus at this point (centre focal point) yet image is not focused. It is a mystery! Every person i have spoken to have never had a problem with 6D.

Click to expand...

Exposure looks reasonable to me. So does the noise. And there seems to be evidence of camera movement making it quite difficult to tell if the camera was focussed correctly or not.

Try some shots from a tripod in better light and see how they go.

ovlov said:

The 6d has more of a tendency towards under exposure then anything else. I would return it to the store rather than have Canon monkey with it. It sounds like a lemon.

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There are few reports on electronic issues messing with light metering in 6d, although that doesn't look like the case. On the other hand, if you feel like there's something wrong looking at your raw, don't ask twice and change it.

Well after many hours of being extremely confused I have found that my Photoshop and Lightroom do not support my Canon 17-40mm L Series lens, I have since borrowed a family members 24-70mm and the issue has dissapated! Had no idea that was the case!

thanks for your help!

schmegg said:

LeahKate said:

photo just for test purposes only, (probably not the best phot to use in this instance)

ISO 100 yet has noise as if it was in the 1000's. Was using auto focus at this point (centre focal point) yet image is not focused. It is a mystery! Every person i have spoken to have never had a problem with 6D.

Click to expand...

Exposure looks reasonable to me. So does the noise. And there seems to be evidence of camera movement making it quite difficult to tell if the camera was focussed correctly or not.

Try some shots from a tripod in better light and see how they go.

Click to expand...

Dont see the noise but a blurry shot, almost certain there is camera shake.



--
Alan.
Great photography is about depth of feeling, not depth of field.
- Peter Adams

LeahKate said:

Well after many hours of being extremely confused I have found that my Photoshop and Lightroom do not support my Canon 17-40mm L Series lens, I have since borrowed a family members 24-70mm and the issue has dissapated! Had no idea that was the case!

thanks for your help!

Click to expand...

Sorry, this statement makes no sense, the only thing this would limit is potentially profile correction. LR had a profile for the 17-40 f4 on the 1Dmk3, but that is APS-H, so you shouldn't enable that correctly. That would not cause over/under exposure, nor would it cause noise. What it would cause is odd distortions...that's about it, and that is only if you enable it.

LeahKate said:

Well after many hours of being extremely confused I have found that my Photoshop and Lightroom do not support my Canon 17-40mm L Series lens,

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While this seems improbable [PS and LR not supporting the 17-40], it is good to hear that the problem has been resolved or getting closer to some kind of Dx.

As a long-time user of PS & the lens profiles in ACR (set to auto), I do not recall noise reduction as a function linked to the lens profile.

Noise is a by-product of sensors and can be minimized or eliminated regardless of lens (maybe a really crappy lens can contribute somehow indirectly). Noise reduction is located on another tab in ACR.

As for under/over exposures in general, there is a reason why all manufacturers include an Exposure Compensation function in all DSLRs and many compacts (sorry, this statement is intended for general consumption and not necessarily directed at you as you may well know this already). However, I do not see how you can see the noise in a three-stop over-exposure.

I have one lens that over-exposes every time and that is an old Contax Zeiss 21mm mounted with an adapter. I've figured that the adapter is somehow causing this, maybe because it is warped or there is something wrong in the AF chip. I wonder if the logic board on-board the 17-40 is malfunctioning.

LeahKate said:

I have since borrowed a family members 24-70mm and the issue has dissapated! Had no idea that was the case!

thanks for your help!

Click to expand...

your shutter speed is 1/15s. unless you were using a tripod, the "blur" appears to be motion blur due to camera shake; otherwise, the image looks fine.