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The light burn out has nothing to do with the lens. That is an exposure problem. Look up "HDR" or "photomatrix". The "dynamic range" is being exceded beyond the capability of your cameras sensor.
The Sigma is a very good lens and will produce outstanding panos.
The Nikkor 10.5 is a better lens and can be shot wide open at f2.5 and still produce very crisp images.
I use the Nikkor 10.5. I never shoot it wide open because it is not necessary. Every lens has a sweet spot and the Nikkors is from f5.6 to f8. The Sigma is about the same in sweet spot
On low light interior shots use shutter speed and NOT aperture to control exposre. You can up the ISO to about 600 without noticable artifact. This will allow you to keep shutter speed above 1/15. Long exposures will produce artifact in low light so to avoid this up the ISO so you can use a faster shutter speed.
I have read that the Sigma does not do well when shot wide open. Many use a constant aperture of F8 and control exposre with shutter speed.
And you shoud be shooting at infintiy. DO NOT use auto focus. The hyperfocal distance of the Sigma is only about 2 or 3 feet. So you will not need to focus unless you are shooting inside of 2 feet. IF you are most likly only one object in your scene will be that close and you have to let that area be a little out of focus in order to have the rest of the scene in focus.
You should also check your shooting menu for the auto settings such as sharpening and noise reduction. These settings can cause quality problems at times. Turn all this off if you can and do this stuff in post production.
If you can shoot raw as this will produce the best source image. But it is not necessary as you can shoot at fine or the highest setting and still have great images. The white balance will be an issue here so be sure to set that approapiatly by measureing or using one of the white balance settings appropiate for your scene.
General Lee
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Panoweaver
Topic: Quality Improvement Helps
