Canon 10-22mm VS Sigma 18-50mm @ 18mm
Klam has posted his sample test of Canon 10-22 and Sigma 18-50mm at FredMiranda forum and commented:
“I conducted the test on an overlapping focal length of 18mm. Since I frequently shot my 18-50 at 18mm, I knew I should try to find something wider, which is the reason that I picked up the 10-22.These 100% crops were shot on tripod, delayed timer, RAW straight converted using Canon DPP.
Both lenses are very decent in the centre. The Canon doesn’t seem to show as much improvement and is quite good “wide open” at f/4.0.
The Sigma looks very soft in the corners at f/2.8. At f/4.0 it improves very slightly but still seems soft. Everything is ok by f/8.0. On the other hand the Canon shows a lot of corner detail even at its “wide open” setting of f/4.0. Overall the Canon is a lot better in the corners.”
- Canon 10-22 VS Sigma 18-50 @ 18mm @ Centre
- Canon 10-22 VS Sigma 18-50 @ 18mm @ Upper left-corner
New Sigma Fisheye Lenses
Sigma just announced its new digitally optimized fisheye lenses. The new Sigma 15mm F2.8 EX DG Diagonal Fisheye Lens and Sigma 8mm F4 EX DG Circular Fisheye Lens are equipped with a new multi layer coating technology that reduce both flare and ghosting.
Sigma 15mm F2.8 EX DG Diagonal Fisheye Lens PRESS RELEASE
Digitally optimized circular fisheye auto-focus lens - Sigma 15mm F2.8 EX DG DIAGONAL FISHEYE
This digitally optimized diagonal fisheye lens is equipped with a new multi-layer coating technology that reduces both flare and ghosting. This also ensures an accurate color balance and high definition results.
Sigma APO Tele Converters
Sigma has just announced two new digitally optimised tele-converters. Sigma claims the new APO Tele Converter 1.4x EX DG and APO Tele Converter 2x EX DG will maintain the high quality of the master lens also keeping the high-speed Auto Focus even when these teleconverters are utilised.
Sigma 28-105mm F2.8-4 DG
A large aperture standard zoom lens that covers wide-angle to telephoto and is ideal for full-frame digital SLR cameras
* New and most effective coating used for minimizing flare and ghost.
* This standard zoom lens covers focal lengths from 28mm to 105mm and allows a large aperture of F2.8 at the 28mm focal length.
* The use of aspherical lens reduces various aberrations and improves optical performance.
Canon 10-22mm VS Sigma 10-20mm Sample Photos
Some sample shots from Canon 10-22mm and Sigma 10-20mm with 100% crop have just been posted by Dougal in Canada.
Here’s what Dougal says about his test:
“My test limits the Canon to 20mm and F-stops identical to those of the Sigma. For simplicity I’ll only provide wide open (obviously the Canon is stepped down a little) results.
I used two scenes for each of the two focal lengths. Draw what ever conclusions you wish…
All images were processed in CaptureOne with no sharpening and Identical exposure and white balance settings. ISO setting for all shots was ISO100, F4 (10mm) shots were shot at 1/800s and F5.6 (20mm) shots at 1/400s. A cable release was also use to operate the shutter.”
Sigma APO 100-300mm F4 EX DG HSM Lens
Fast aperture telephoto zoom lens that provides excellent optical performance for Digital SLR cameras and film SLR cameras
This telephoto zoom lens provides a large F4 aperture at all focal lengths. The new multi layer lens coating and lens design reduce flare and ghosting, and also maintains minimal light-fall-off, superior peripheral brightness is ensured.
Sigma 28-70mm F2.8-4 DG Lens
Compact, large aperture zoom lens is ideal for digital and 35mm SLR cameras
Sigma Corporation is pleased to announce the launch of the new 28-70 F2.8-4 DG lens. This compact, large aperture zoom lens is ideal for digital and 35mm SLR cameras. The new multi layer lens coating and lens design reduce flare and ghost, and also creates an optimum color balance through the entire zoom range. An aspherical lens element is used for excellent correction of distortion throughout the entire zoom range.
Sigma 28-105mm F2.8-4 DG Lens
A large aperture standard zoom lens that covers from wide-angle to telephoto and ideal for full-frame digital SLR cameras.
Sigma Corporation is pleased to announce the launch of the new 28-105 F2.8-4 DG lens. This large aperture standard zoom lens provides superior performance both for Digital SLR Cameras and 35mm Film SLR Cameras. This standard zoom lens covers frequently used focal lengths from 28mm to 105mm and allows a large aperture of F2.8 at the 28mm focal length. It is very convenient for a wide range of applications including snap shots, indoor photography. The new multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras, and also creates an optimum color balance throughout the entire zoom range.
Sigma 28-200mm F3.5-5.6 DG Macro Lens
A compact, high-zoom ratio lens, designed to suit the special characteristics of digital cameras.
The Sigma Corporation is pleased to announce the launch of the new 28-200mm F3.5-5.6 DG Macro lens. This compact, high-zoom ratio lens is designed to suit the special characteristics of digital cameras. The new multi-layer lens coating and lens design reduces flare and ghosting, and creates an optimum color balance throughout the entire zoom range.
Sigma 70-300mm F4-5.6 APO DG Macro
Sigma 70-300mm F4-5.6 APO DG Macro reviews, sample shots, full specifications, and forum discussions
Telephoto zoom lenses with tele-macro function, optimized for digital cameras.
The high performance telephoto zoom lens is ideal for digital SLR cameras. This lens has two SLD glass elements in the front lens group and one in the rear lens group It is able to shoot with maximum magnification 1:2 at the focal length of 300 mm. It’s the ideal lens for portraits, sports photography, nature photography, and other types of photography that frequently use the telephoto range
Sigma 70-300mm F4-5.6 APO DG Macro reviews (last update: 04.09.05)
