Sigma 10-20mm

Funny Aya
Originally uploaded by kirtbird

Spent some time surfing the web this morning looking for reviews, sweet spots, and other good, bad, or constructive information about my Sigma 'ultra' wide angle lens. There was a lot in this article at Nikonians that has confirmed my end-user experience over the past couple months. This article shows that the sweet spot is probably at about f/11 or f/8 above 12mm. This lens is so wide at 10mm that I cannot use any filters without having to crop the corners. Even the Cokin wide angle adapter gets in the way at the very corners. But have also found that at 10 mm the chromatic aberration is noticeable in the corners - more noticeable than this review lets on. CA really starts to show if you do any HDR post-processing, so try and avoid it as much possible.

Now that I know the widest 'sweet' focal length is about 12 mm to 14 mm (14 mm if I want to use the lens mount polarizer), I now have to go back to evaluating hyperfocal distances.

For the sweet spot on the Nikon 18-135 mm and the Nikon 18-55 mm VR, stay tuned! Digging up some information on those next.

The picture on this blog is my younger daughter.