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 Jim, I remember them well from the early sixties, my dad used to play merry hell with me when I was playing with my train set when he wanted to watch sport on the TV at weekends. I just thought, though, it may not be a problem with the sensor itself, more likely to be some part of the electronics resonating at a certain frequency, some kind of signal converter, perhaps. Was the humidity high when the striped shots were captured? Cheers Douglas On 09.02.2011 23:52, Jim Nichols wrote: > 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 > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for > more information >