I can't see the noise in the image size posted here.
Your camera settings were 1/800 sec and f/7.1 at ISO 200. Those settings should not result in much noise unless you significantly underexpose the image.
Active D-Lighting on high will reduce the exposure - I think it is 0.7 stops on High. The exposure is corrected with a curve that may add some noise.
Most likely the cause of the noise is processing - either in camera or post processing. Sharpening, contrast, and brightness can all add noise to an image. Combining in camera settings with post processing settings to double process can add to the noise. The effects are more severe with processing JPEG's or small files. You may need to apply noise reduction or Gaussian Blur to remove the noise.
Sun 08-Jul-12 08:23 PM | edited Sun 08-Jul-12 08:31 PM by wgregww1
>Were they converted to JPEG in camera or in post? Did you >use a picture control - and if so - which one? > >Eric Bowles >Nikonians Team >My Gallery >Workshops > >Nikonians membership — my most important photographic >investment, after the camera
I converted them to JPEG from Lightroom. Butt even when I look at the RAW file it looks the same.
stop zooming in I remember somewhere it has been mentioned that blue sky especially can look noisy on the 300 ,300s ( which I have and I feel that yes blue skies can look this way very easily) Also I think a lot of what you 'see' is atmospheric 'noise' If you look at what you have in focus (the plane)do you feel you still see the noise?
If you are using Lightroom to load RAW images and convert to JPEG, any settings you applied may be impacting the image. That includes auto levels and sharpening.
I would not use ADL on High if you are using Lightroom unless you are creating JPEGs. With RAW files, Lightroom ignores the ADL setting, but the exposure is 0.7 stops lower than the exposure the camera would normally apply. No curve is applied to recover the shadows. And with an underexposed image, auto levels or other steps can create noise.
Video images are lower resolution than your photos. Having more noise in video would not be unusual - especially if you are underexposing the image. I'm not sure how ADL and other camera settings would work with video.
ADL is useful for JPEGs - especially in high contrast situations. ADL Low does not adjust exposure so it does no harm. For those who use post processing that honors camera settings - like View, Capture, and Photo Mechanic - ADL is useful for RAW files. If you use Capture NX2, ADL can be changed in post processing although the exposure adjustment is final when the exposure is created.
In my testing, I found ADL creates and applies a complex curve that is hard to replicate in post processing.
I see little advantage to using ADL with Lightroom other than the in camera benefit to JPEGs in high contrast situaitons.