Sigma sd Quattro Full ISO Range Quality Test - 100 to 6400, Sigma 30mm f/1.4 DC HSM A - Jody Bruchon

EDIT: I MESSED UP AND PUT dp IN THE TEXT. It's the sd Quattro, NOT the dp series. Sorry for the super dumb typo. I'd remake this but it's been up too long to redo over a typo.

Sigma's Foveon sensors and Merrill/Quattro cameras are notorious for two things: amazing detail and colors, and awful imaging performance above ISO 200. Unfortunately, Sigma's cameras are relegated to being niche units, receiving very little attention from most camera publications and channels, while their lenses are famous for being very sharp, very high quality, and surprisingly affordable. I only found one web page on the entire internet that attempts to show the Quattro series sensor performance across the entire ISO range, and even then, it's small images in full-stop ISO increments. I appreciate that information being available, but it only left me wanting more.

So, here's my test of the full ISO range of the Sigma sd Quattro, paired with the Sigma SA-mount 30mm f/1.4 DC HSM Art "kit lens." The video is published in 6K so that changes in details are easily spotted. The subject is a bottle of cheap wine (Wild Irish Rose) that I won't be trying again. You can actually see the "tears of wine" sliding down the glass.

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