It was shot at 1/30th. I just checked and found that the subsequent frame shows even more magenta noise. (Same people, same black shirts.)
http://photo.net/photodb/photo?photo_id=6637600&size=lg Some of the noise appears to look like widely spaced bands, but in other places it looks more like blotching. Again, this was shot at ISO 500 and midrange brightness was increased a moderate amount. Somewhat less than a stop I'd say. (I just did this last night, so I remember. By tomorrow, I'll forget:-). Perhaps it has something to do with light angles. It's a mix of direct flash and flash off the ceiling. Don't know. But my client will never notice, and I'm not going to point it out:-). Paul -------------- Original message ---------------------- From: Mark Roberts <[EMAIL PROTECTED]> > Mark Roberts wrote: > > >FWIW: I noticed the vertical banding in the dark areas of Paul's photo. > >Looks odd to me in that the bands are spaced quite far apart. Perhaps > >it's EMF from fluorescent lighting or some other source? > > Make that "EMI" (electromagnetic interference) > >From the spacing of the lines, it would appear that about 15 would fit > across the entire frame. Given the 120Hz frequency you get from > fluorescent lights, that would equate to a shutter speed of 1/8 second, > which seems too slow for this shot, so that explanation doesnt' pan > out. I'm stumped. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
