Archived posting to the Leica Users Group, 2011/02/09

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Subject: [Leica] IMG: annoying banding - is my M8 becoming apaper weight?
From: jhnichols at lighttube.net (Jim Nichols)
Date: Wed, 9 Feb 2011 16:52:08 -0600
References: <4AE947AB-AF74-4E4A-B0AE-DA96FB5D330A@frozenlight.eu> <261015A2-ED0E-4C3A-87BC-2AFB15E8F946@frozenlight.eu> <5CDA7FB5-D644-46CD-9E7F-468F72760406@gmail.com> <AANLkTikk6WJG4pHSow0SpioQ61LCrELs0MzU36Cvh=rk@mail.gmail.com> <7D792F03-C902-4EAE-ACF5-18B4201BFE4A@frozenlight.eu> <AANLkTimo7cNyTfBuLh18QbE11LQ5DxTBWZ4CM9ydk_oP@mail.gmail.com> <62C9B356-EB49-479D-96D1-13C28677659A@frozenlight.eu> <AANLkTimEw6yB0KpoRUMjDZw0XT+VSAFkrFYNh2=uH3G7@mail.gmail.com><AANLkTinMEWeOUo7C0wTN7jOB2GSkANL5FdY4gkahKwzq@mail.gmail.com> <4D5317F7.2080504@gmx.de>

Hi Douglas,

Those interference descriptions remind me of problems with early 
over-the-air TV.  I recall the 1950s.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "Douglas Sharp" <douglas.sharp at gmx.de>
To: "Leica Users Group" <lug at leica-users.org>
Sent: Wednesday, February 09, 2011 4:40 PM
Subject: Re: [Leica] IMG: annoying banding - is my M8 becoming apaper 
weight?


> Hi all,
>
> Just a rather abstract, and possibly absolutely silly
> idea - I'm not even sure whether the same parameters
> (or indeed physics and electronics) apply, but we used
> to get banding effects like that on seismogram
> recordings when a powerful power source was somewhere
> near to the geophone line on seismic surveys.  - if
> anyone could work out the frequency, you might be able
> to locate the source.
>
> Did you have a mobile phone switched on and close to
> the camera when the banding happened, were you near a
> mobile phone antenna? Close to high-voltage power
> lines, a generator or or a starting car? These were
> typical of the electronic and acoustic problems we
> encountered, and the very devil to get rid of.
>
> Cheers
> Douglas
>
>
>
>
> On 09.02.2011 22:54, Richard Man wrote:
>> Nathan, I think Geoff's analysis is correct. I don't think this is the
>> "banding" that most people refer to. I have gotten those on the M8 as 
>> well,
>> for example, a purple band of light where there's a specular light 
>> source.
>>
>> One thing to remember is that even when shooting RAW, the CPU is doing a 
>> lot
>> of interpolation. There is always a chance that some boundary conditions
>> would cause a bug to show up. If your condition is becoming repeatable, 
>> it
>> could even be some hardware defects that are showing up in the circuitry,
>> combined with certain operating conditions that cause the problems you 
>> see.
>>
>> As for fragility of a brand/camera, electronics changes everything.
>> Supposedly the Canon 1Ds Mark-whatever never resolved their autofocus
>> problems etc. I think the difference is that people do expect a higher 
>> level
>> of reliability and performance due to the price, but in reality, it isn't
>> always true.
>>
>>
>


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Replies: Reply from douglas.sharp at gmx.de (Douglas Sharp) ([Leica] IMG: annoying banding - is my M8 becoming apaper weight?)
Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] IMG: annoying banding - is my M8 becoming appear weight?)
In reply to: Message from photo at frozenlight.eu (Nathan Wajsman) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from photo at frozenlight.eu (Nathan Wajsman) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from steve.barbour at gmail.com (Steve Barbour) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from images at comporium.net (Tina Manley) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from photo at frozenlight.eu (Nathan Wajsman) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from hopsternew at gmail.com (Geoff Hopkinson) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from photo at frozenlight.eu (Nathan Wajsman) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from hopsternew at gmail.com (Geoff Hopkinson) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from richard at imagecraft.com (Richard Man) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)
Message from douglas.sharp at gmx.de (Douglas Sharp) ([Leica] IMG: annoying banding - is my M8 becoming a paper weight?)