Archived posting to the Leica Users Group, 2011/02/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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. >> >> > -------------------------------------------------------------------------------- > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information