jussihirvonen

<p>I'm guessing the light source was a basic fluorescent light? With fluorescents the color temperature changes when the light flickers and with the right shutter speed (short enough) you capture the different color temperature from one blink to another.<br>

<br />Looking at the pictures I cannot think of any other explanation.</p>

<p>I currently only have 2 lenses, 30/1.4 Sigma and 50/1.4 Canon. The Sigma is a great allaround lens, which will cover most situations surprisingly well in indoors. I need the 1.4 to 2.0 aperture quite often and am ok with the IQ. I rather use the larger apertures than too high ISO's. Sometimes you need both, that's when you appreciate the extra stop or two on your lens.<br>

The 30/1.4 is not an ideal landscape lens for me since the minimum aperture is only f16, I find that too large many times when I want to blur the water or whatever. You can use ND filters, but that's always extra hassle.<br>

Autofocus wise, I was actually surprised the difference between the Sigma and the Canon is so small. The Sigma will focus consistently in good light, will drive you crazy when you try to get a focus in the dark or backlight, but so will Canon. Though the canon may be slightly more consistent in difficult situations, but only marginally.</p>

<p>Anthony, your wife was just testing you out. The 50/1.2 was never an option.</p>

<p>I think this is not so much a case of lack of skill as it is a technical problem. I think there is something wrong with your camera. Go have it fixed, and you'll start getting perfectly exposed pictures. Your camera seems to be so consistent in underexposing the images that it must be a malfunction of some sort.</p>

<p>I recently switched from 20D to 40D. The latter is noticeably quieter, although I don't know what a 20D would sound like out of the box, since both were used when I got them, 40D only 5000 counts though. I assume the noise does not change dramatically over time, unless it is about to give in.</p>