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Re: [OM] 5D II pattern noise problem

Subject: Re: [OM] 5D II pattern noise problem
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Tue, 01 Dec 2009 08:49:55 -0500
Will you try Nikon and Sony next?  How will you use those OM Zuikos?

Chuck Norcutt


C.H.Ling wrote:
> Thanks Moose and all who concern about this, I know you are trying to help I
> was just very disappointed about the performance of 5D II. The problem
> happen on all ISO while the low ISO are more obvious due to lack of sensor
> noise. This problem shouldn't happen on an experience camera maufacturer.
> 
> Mask and random grain can help but this require extra work than a simple NR
> and in some ways distorted the original image.
> 
> Yes, I have been searching for a good camera, while I thought the 5D II is
> close (besides mirror vibration and viewfinder where they are even poorer
> than my 30 years old OM) now it gives me some problem that I have never
> think of. Actually, my criteria is not really tough, I was just bad luck. I
> think you will also not accept a camera with tilt viewfinder, AF focus shift
> or such noise issue.
> 
> I hope I can found a solution on that, at the mean time I can only shoot
> with great care to avoid underexposure.
> 
> C.H.Ling
> 
> ----- Original Message ----- 
> From: "Moose"
> 
>> C.H.Ling wrote:
>>> NeatImage was the first thing I tried, it improves but I was not totally
>>> happy about the result, it left a trace of pattern when you look for it.
>>>
>> I agree, although in my test, it's very subtle. Is anyone not peering at
>> 100%, looking for it, going to notice?
>>
>>> Stronger NR may eliminate the pattern but I hate the lost of details and
>>> artificial look. I once do NI on almost all digital images but I found it
>>> look too smooth to my taste so later when I really need NI I leave some
>>> noise.
>>>
>> As I tried to show on the ISO 12,600 sample image, you really can't
>> leave some of the existing pattern noise, as that makes the pattern
>> noticeable. To avoid the plastic look, it's better to add noise without
>> a pattern. There I used the Noise filter in PS, but somewhere around
>> here, I have scans of blank film shots that may be used to add film
>> looking grain. Added grain helps mask the tracks of the pattern noise,
>> too.
>>
>>> Mask? what is mask,
>> A mask layer that restricts the NR effect to only parts of the image.
>> Pretty quick to do in PS and doesn't make the lighter parts look
>> unnatural at all, as they are completely unaffected.
>>
>>> why I need that much work when other cheaper DSLRs don't require it.
>>>
>> You don't, unless there are other reasons to keep the 5D II. I was only
>> trying to suggest alternatives for correcting at least the images you
>> already have - perhaps even to make keeping the camera an option if you
>> otherwise like it.
>>
>> You've gone through several DSLRs in the last few years, looking for
>> perfection. Maybe it doesn't exist and you may need to pick the one with
>> the least objectionable limitations?
>>
>> On the other hand, if you keep up the search, perhaps your findings will
>> help us all.  :-)   You are certainly a tougher critic than any
>> reviewers I know of.
>>
> 
-- 
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