Just some sample shots taken with my new 1D X in lowlight

[Dwight]

were taken into LR with default adobe profile and exported in jpg

Maybe it's because you imported Raw files to LightRoom and used LR to make a jpg and you didn't use Canon's jpegs out of the box. Don't worry. Just check the histogram and shoot to the right.

Your SS were at 1/1600 and 1/2500. Unless you have a valid reason shooting at those speeds, IMHO, the fast SS was the undoing of those images (not the camera nor the sensor per se). Images in general get a lot of random noise when exposed at high SS and high ISO. http://www.cambridgeincolour.com/tutorials/image-noise.htm

Sorry but you said it in reverse. High shutter speed is the oposite of Long Exposure (= Very low Shutter Speed = many seconds) that is shown in the article you mentioned.

Hey tron! I'm sorry, but I don't see how I had my original statement in reverse. paolotaverna's EXIF show that he was shooting at 1/1600 and 1/2500...equals fast SS (aka short exposure) as I've said, random noise, per linked article, is caused by short exposure (equals less light reaching the sensor) and High ISO. Hence, there was a bit of random noise in his first 2 images. paolotaverna was shooting with a 50L indoors in ambient lowlight. I had suggested for him to shoot with a slower SS (aka longer exposure), at the same high ISO, perhaps at 1/focal length, to let more light into the sensor and to address the random noise on his images.

Bottomline, I can't see how Canon's flagship camera should have a high degree of manufacturing differences as evidenced by the amount and quality of noise in our images.

 

[Dwight]

Thank you Dwight

I have run 3 other shot tests
http://photos.paolotaverna.com/p552754205/h4c4dd62c#h4c4dd632

1- I put in AE mode
2- Shutter is now 1/400 (I assume this is a medium speed shutter)
3- I have used "exterior" light as it's early in the morning (naturally not much light)


When I look at my shots...I'm really concerned - when I look at yours it's like if I have a totally different camera...this is really disappointing...don't know what to do next.

paolotaverna, I'm concerned about your images too, but I don't think there are enough technical reasons to be alarmed just yet. Would you please do this for us. Would you shoot at 1/focal length? You were shooting those last 3 images at 1/400. I have no idea if it necessitated the fast SS based on your lighting (I know you were shooting AE-Av)...there didn't seem to be that much light as you've said, but just try ME and shoot at ≥1/50 (meaning slower or equal to...might need to use a tripod to avoid camera shake)...stop your 50L's aperture down (f2 or f2.8 is fine) and see if the noise improves. Keep us posted.

 

[Dwight]

Good day,

1- I imported RAW in LR4 (in camera I used camera standard...but you will agree that it is useless as LR4 does not keep this)
2- Used LR4 default raw interpretation of the Canon 1Dx raw file (also default sharpening values)
3- I exported jped - large- no resizing and no output sharpening!



regards

paolotaverna, try DPP and see if there's any difference. When shooting RAW, I always use "Neutral".