Sigma

Infrared on EOS 450D

So, you wanted to do some Infrared (IR) photo with your Canon EOS 450D/Rebel XSi? Just have a look at the IR tests done by Wayne J. Cosshall. By the way, traditionnally, since the Foveon technology of sensors does not use infrared filters, the Sigma dSLR cameras are very good candidates for IR photo.

Comparison of 80-200mm zooms

DPreview has a good comparison of 4 zoom lenses opening at f/2.8 for SLR cameras: Canon 70-200mm F2.8 L IS USM Nikon AF-S VR 70-200mm F2.8 G Sigma 70-200mm 1:2.8 EX DG Apo Macro HSM II Tamron 70-200mm 1:2.8 Di LD (IF) Macro Since they are one of the most coveted segment of the SLR…

Web sites for lens reviews

It is often difficult to group lens reviews in order to compare/evaluate a little more than their mere physical characteristics (focal length, aperture/diaphragm, or even number of individual lenses). But how would you evaluate/review optical quality? When I see the really impressive differences between two lenses, I would be prepared to judge from their price,…

Sigma purchases Foveon

Finally, Sigma decided to buy the company producing their digital camera sensors. Since Foveon is really only manufacturing for Sigma, this makes sense from the camera manufacturer’s point of view. But, I can’t help regretting the lost opportunity of using Foveon’s multiple-stacked-pixels interesting technology within other camera brands. Let’s see what this will bring to…