But Chuck still doesn't see any pattern
Chuck Norcutt
Moose wrote:
> C.H.Ling wrote:
>> Actually my first choice was a brand new 5D, I was hopping that the price
>> would drop to $1500 when the 5D II available but it didn't. A brand new 5D
>> early this year still cost $2000 in the shop while 5D II was $2500
>
> At least one other asked about pattern noise on the 5D. And, of course,
> this thread made me curious. I have yet to find it at ISO 200 or below.
> Noise when pulling shadows way up, yes, but no pattern.
>
> The shadow noise at ISO 800 does have a clear pattern. I did a bit of
> testing on it. The image isn't anything much, mostly as I slightly
> missed the focus without quite enough DOF. Also, I know it looks better
> without the shadows dragged out in public - but they are the point of
> the exercise.
> <http://www.moosemystic.net/Gallery/tech/PatternNoise/5D800Pnoise.htm>
>
> 1. The whole frame at the ACR default settings.
>
> 2. The whole frame with ACR Fill Light +50.
>
> 3. A portion at full pixel, ACR default.
>
> 4. Neat Image using Auto Profile. Pretty nice job, but the slight
> remaining noise still shows the pattern. Probably nothing to see in a print.
>
> 5. Neat Image with some settings changes. The noise is gone, but if you
> look closely, like CH :-) , you will see a mottling of light and dark
> still showing the pattern.
>
> 6. A further setting adjustment, activating Very Low Frequency and
> upping the Low Frequency setting. As far as I can see, there is now no
> discernible pattern - at least without referring back to prior versions.
>
> However, there is another disturbance in the force. Look at the blue
> blob compared to the prior version. there is some subtle rearrangement
> or loss of larger scale detail. I don't care here, as it's an OOF
> highlight and softer is better. But it is something to be aware of when
> playing with the low freq. settings. If it's a problem, it can be masked.
>
> 7 & 8. Here's a piece of the small in-focus portion of the frame, before
> and after full NI treatment. As you can see, rather than any loss of
> detail, the resharpening has actually made it sharper. That could be set
> differently or the whole bright area could be masked from the NI effect.
>
> Moose
>
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