What is very interesting is when I look at the ISO800 file it looks like an image I shot after my very first time I wet cleaned a sensor. I had residue on the sensor and it looked like this. If you are going to redo the test shoot one at f16-22 and shoot the same image wide open and see if the appearance is different. I have an a6000 and I might create a custom camera profile with my Colorchecker passport and see if it changes. Just my thoughts.
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Strange A6000 Blue Sky Noise
- Thread starter javayoda
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I think so.
I downloaded your shot with the snow in the branches. Using the free Capture One; yours and my sky shots both have but a light fine grain of noise at 100%. When I switch to your posted shots or my jpeg shots..OMG!
Granted the A7II looks a bit cleaner, imagine that!
You might revisit the A6000 review and check the noise plots on the color patches. The blue channel is about what I see using kit lens or Nikon MF glass.
Now I eventually have to get my sensor cleaned as I do have a couple of small circle blotches that are appearing. This will be down the road as nothing gets very obvious unless at 100% or higher on solid blue screens.
You guys are going nuts about the sensor. It's not the sensor on a new camera. Small blotches that are out of focus are on the lens not the sensor in general.
I'll say it again, have the camera serviced. Or send Sony example images via chat support and see what they say.
I'll say it again, have the camera serviced. Or send Sony example images via chat support and see what they say.
Did you miss the part about " with Kit and Nikon MF glass"? You were going on about sensor noise, sorry I missed the part about "blotches" in your post.
In any event it is NOT an issue with me but will be investigated at a later date
Cheers
Here, I just went outside and took a few shots of the sky/trees with the a6000 + SEL35F18 at the same settings you posted which is ISO 100, F8, 1/400th. Have a look:
I noticed the same issue with my A6000 and blue skies - noisy grain already at ISO 100 RAW where the A7 would deliver silky blue skies with the same settings. Even worse are the ugly blotches (similar to a strongly compressed JPG) in the Blues when post-processing i.e. for a HDR image. It seems there is hardly any leverage to extend the dynamic range without strong penalty. And these are normally exposed RAW pictures without any larger under- or overexposure.
This was my only disappointment with the A6000 so far, but it is a serious issue for landscape photographing. I do not recall the NEX 7 having such problems, except that it could get noisy quickly too.
This was my only disappointment with the A6000 so far, but it is a serious issue for landscape photographing. I do not recall the NEX 7 having such problems, except that it could get noisy quickly too.
There has been a way on quite a few Canon cameras to eliminate hot pixels and reduce banding but I have never seen this as a officially sanctioned technique but it works. Basically when the camera is put in manual cleaning mode which lifts the mirror and opens the shutter and exposing the sensor but with the body cap on the camera and no light allowed to hit the sensor this somehow re-maps or created a new dark capture file. I personally have seen this work but not sure what is going on. Is there somehow a technique or maybe manually resetting the a6000 that can force a new dark frame capture? I worked with a very old studio view camera with a digital back that the first step in the workflow was to put the lens cap on the camera and create a new dark frame. --
www.christopherbroughton.com
www.christopherbroughton.com
Focus Breather
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Sorry, I left my house and am on the road for the day. I can say this though, shooting with RAW and then applying standard noise reduction generally looks a tad better than the OOC JPEG. Obviously this was OOC. Sorry about that.
mike in brazil
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were you using a polarizer by any chance on the 19mm? This is a real reach, but on my IR modified Oly, i had a weird experience whereby I had used a polarizer on a bright blue day like the one you show, and the sky was incredibly noisy, though in my case it was in the upper right
No polarizer. For the other poster, the effect is the same regardless of lens profile in LR.
dave_bass5
Veteran Member
I thought I was seeing things today when I was processing some raw files from my a6000. I thought I was seeing some JPGS artifacts in images I posted to Flickr, but now I know it's an issue with the camera.
Im fairly new to Sony, and didn't know about the blue issue that some have posted about in other threads. It's a shame that such a nice camera has this issue.
Im fairly new to Sony, and didn't know about the blue issue that some have posted about in other threads. It's a shame that such a nice camera has this issue.
Lest someone think it's my post processing or jpeg compression causing the issue, here's a comparison with the M43 GX7 with Lumix 12-35 lens. The way I see it the A6000 benefits from the added sensor resolution but is ruined by the blotchy blue sky noise. The GX7 is certainly noisy but I don't find it objectionable in normal viewing.
GX7 12-35 at 14mm
A6000 Sigma 19mm
The question that remains for me is whether my A6000 is defective in some way. It sounds like others have similar issues.
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PhotoGrok: http://www.haplessgenius.com/photogrok
GX7 12-35 at 14mm
A6000 Sigma 19mm
The question that remains for me is whether my A6000 is defective in some way. It sounds like others have similar issues.
--
PhotoGrok: http://www.haplessgenius.com/photogrok
Thanks for that link! Changing the camera profile from Adobe Standard to Camera Standard pretty much eliminated the problem from my perspective.
Thanks!
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