Four Special Low Dispersion (SLD) glass elements are provided for effective compensation of color aberration, which is a common problem with super-wide angle lenses. Two pieces of... more
its focal length by 1.4 times. Featuring an Aperture coupling range of F2.8 - F32, the APO Tele Converter EX decreases the effective aperture by one F-stop. This tele-converter employs lens coating technology to reduce both flare and ghosting. Compact and lightweight, this tele-converter has a 5-elements-in-3-groups lens construction and is designed for use with select Canon Mounts.
its focal length by 1.4 times. Featuring an aperture coupling range of F2.8 - F32, the APO Tele Converter EX decreases the effective aperture by one F-stop. This tele converter employs lens coating technology to reduce both flare and ghosting. Compact and lightweight, this tele converter has a 5-elements-in-3-groups lens construction and is designed for use with select Nikon Mounts.
lens and subject. Its power layout produces an excellent optical performance and also reduces flare and ghost. The narrow angle of view is a great aid for simplifying backgrounds and shallow depth of field makes it easier to handle the composition. This lens is designed to reduce the influence of harmful light caused by reflections from the digital image sensor. The incorporated a Dual Focus (DF) system makes it easy to hold the lens during auto focusing. Its large focus ring offers smooth and positive action whilst focusing manually. It includes a screw-in hood for convenient use of circular polarizing filters. This lens is specifically designed for Select Nikon Mounts.
This lightweight sharp lens with a fast F2.8 aperture is an excellent lens for those who prefer a fixed focal length, and makes an excellent addition to any photographers system for available-light shooting. The advanced lens design corrects various aberrations. This macro lens is specially coated to get the best color balance whilst cutting down ghost caused by reflections from the digital image sensor. This lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras. This lens offers 1:1 Life Size macro capability.
minimum focusing distance of 1.31 ft. It's equipped with the HSM (Hyper Sonic Motor) system that provides quiet high-speed auto-focus shooting, as well as full-time manual focus. It features two SLD (Special Low Dispersion) glass elements and a hybrid aspherical lens that provides correction for all types of aberrations. With a maximum aperture of F1.4, the 30 mm F1.4 EX DC HSM Lens performs efficiently in a great range of applications, including snapshots, portraiture, indoor shooting and landscape photography.
lens to increase the focal length of your camera by 2.0X. Featuring focal length of 2.0X and aperture coupling range of F2.8 - F32, the APO Tele Converter EX decreases the effective aperture by two F-stops. This tele-converter employs lens coating technology to reduce both flare and ghosting. Compact and lightweight, this tele-converter is a convenient way of converting lenses into long focal-length lenses, therefore ensuring that those unexpected opportunities are not missed. The 2.0X APO Tele Converter EX DG is specifically designed for Select Nikon Mounts.
lens and subject. Its power layout produces an excellent optical performance and also reduces flare and ghost. The narrow angle of view is a great aid for simplifying backgrounds and shallow depth of field makes it easier to handle the composition. This lens is designed to reduce the influence of harmful light caused by reflections from the digital image sensor. The incorporated a Dual Focus (DF) system makes it easy to hold the lens during auto focusing. Its large focus ring offers smooth and positive action whilst focusing manually. It includes a screw-in hood for convenient use of circular polarizing filters. This lens is specifically designed for Select Canon Mounts.
Lens from Sigma has minimum focusing distance of 40 cm. This large aperture 30 mm F1.4 EX DC HSM DC lens is designed to match the APS-C size image sensors of digital SLR cameras. Two SLD glass elements are especially effective in the compensation of magnification chromatic aberration. Glass mold aspherical lens at rear group of lens reduces color aberration and provides high-quality image results. From 40 cm minimum focusing distance to infinity, this lens creates very sharp images with high contrast.
camera and capture high-quality shots. It features Digitally Optimized Circular Fisheye auto-focus lens that produces circular images with an angle of view of 180° when attached to a full-frame digital or 35mm film SLR camera. This auto focus lens is equipped with a new multi-layer coating technology and Special Low Dispersion (SLD) glass that reduces both flare and ghosting for excellent image quality. It also incorporates auto focus system to get accurate focusing that might be difficult through finder due to extremely large depth of field. In addition, the lens comes along with a gelatin filter holder at the rear, allowing the use of gelatin filters. Offering precision focusing for versatile and easy subject selection, the lens can also be used for scientific applications.
Four Special Low Dispersion (SLD) glass elements are provided for effective compensation of color aberration, which is a common problem with super-wide angle lenses. Two pieces of molded glass and three aspherical lenses, including two molded glass aspherical lens elements, offer excellent correction for linear distortion as well as all types of aberration. 12-24mm F4.5-5.6 EX is an ideal lens for Digital SLR Cameras as well as film SLR cameras. It is easy to revert to Manual Focus by simply turning the focusing ring and overriding the AF. An inner focus system provides high performance and convenience. The non-rotating lens barrel perfectly suits the matched petal shaped lens hood. 12-24mm F4.5-5.6 EX DG lens offers a minimum focusing distance of 28cm/11in. at all focal lengths. The super-wide angle's useful range of view offers the photographer greater freedom of expression.
Advantages Superb design, value for money and professional results. Disadvantages None
...SigmaEX 12-24mm F4.5-5,6 DG Nikon fit AF D.
This a great wide-angle zoom lens offering professional performance, results and is a joy to use.
It is suitable for both digital SLR's and 35mm Film cameras and focusing can be used manually or autofocus.
This my first Sigma lens as I own only quality Nikon lenses so I was unsure at first about purchasing a brand and lens unknown to me.
Any doubts or fears about quality were put to rest as soon as I took the lens out of it's box. It is as well crafted as any Nikon lens and a truly remarkable piece of design. It has an unusual appearance as instead of the usual glass flat surface lens it has a "bobble" or "ball" of glass which has a very alien look to it. I'm still not used to this and I feel that as it is sticking out so much that it may be a bit vulnerable to potential damage...
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Advantages value for money (compared to pro level), build quality, Disadvantages makes you think your a pro, but by its nature, proves you otherwise.
...This sigma lens is often a favourite starting point for digital SLR users (single lens reflex) looking to upgrade the 'kit' package they bought on impulse in the January sales.
"I know, I've got a million pix of my children and cat, now I'll photograph flowers and insects with a macro lens, whatever that is".
Don't kid yourself; the whole idea of this lens is to get close-up and personel with your subject matter (insects and flowers being two of my favs). If your looking for a mid-sized telephoto lens just to add to your camera bag, go and by a mid-sized zoom lens. Macro photography is not for the faint-hearted. It requires patience, skill and an understanding beyond that of the family photo album. But the rewards are excellent.
With a good, solid build quality and good optics; it is worth buying if you can't afford a pro...
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Advantages excellent image quality, sturdy build, great price Disadvantages relatively slow aperture, slight softness in mid-range of zoom.
...The Sigma 10-20mm EX lens is a low-to-mid priced lens, aimed at the amateur/enthusiast market and available in the usual Canon and Nikon mounts.
I own the Canon-fit, so all information contained in this review is in relation to that lens.
For anyone interested in landscape photography, a wide-angle lens is a must-have piece of equipment. With standard kit lenses generally weighing in at the 18mm range at their widest zoom setting, you will be astonished at what the extra 10mm can provide you with. With this extra range of view, it's also an ideal lens for architectural photography and can make even small interiors appear almost cavernous at times.
The lens itself is solidly-built, as you would expect given the pricetag and the SigmaEX badge - a mark of quality on Sigma's lens range - and the weight is satisfying. It may feel...
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1/19/2008
10/3/2008