Di II: Lenses are designed for exclusive use on digital cameras with smaller-size imagers and inherit all of the benefits of our Di products. These lenses are not designed for 35mm film cameras and digital cameras with image sensors larger than 24mm x 16mm.Optical/Mechanical Feature Key IF: Internal Focusing ASL: Aspherical LD: Low Dispersion XR: Extra Refractive index Glass Di-II: Lenses for Digital Cameras Only The SP AF17-50mm F/2.8 is a lightweight, compact, fast standard zoom lens designed exclusively for digital SLR cameras, expanding the product concept of the popular SP AF28-75mm F/2.8 zoom lens.In addition, portrait shots are made beautiful with the natural out-of-focus effect characteristic provided by the fast F/2.8 aperture. Additionally, a broader photographic expression through the use of faster shutter speeds as a result of the maximum aperture offers enhanced photographic pleasure. The lens boasts one of the best close-up shooting performances in the class of fast standard zoom lenses designed exclusively for digital cameras and featuring an F/2.8 maximum aperture throughout the entire zoom range, to ensure stress-free photographic shots at all focal lengths and distances.
Filed under Nikon Cameras by on May 1st, 2010. Comment. 
Sigma is pleased to announce the launch of the new 10-20mm F4-5.6 EX DC HSM lens. Covers a superwide angle of view 102.4 to 63.8-degrees (SD format) Three pieces of Special Low Dispersion (SLD) elements and three aspherical lens elements produce top quality optical performance. Inner focusing system ensures the length of the lens remains unchanged whilst controlling aberrations. Equipped with HSM (Hyper Sonic Motor) system Minimum focusing distance of 9.4″ (24cm) at all focal lengths. Relatively compact, lightweight for an ultra wide-angle zoom lens. The Super wide-angle zoom lens designed exclusively for digital SLR cameras 10-20mm F4-5.6 EX DC HSM lens allows enjoyment of super wide-angle photography and it is a very powerful tool for indoor shooting and landscape photography with APS-C size image sensors of digital SLR cameras. Wide angle of view (102.4-degrees at 10mm and 63.8-degrees at 20mm) offers the photographer greater freedom of expression. Three SLD glass elements are employed for effective compensation of color aberration, which is a common problem with super-wide angle lenses. One piece of glass mold and two hybrid aspherical lenses, offer excellent correction for distortion, as well as all types of aberration. This lens is equipped with an inner focusing system, and the models which are equipped with HSM system provide quiet, high speed autofocus shooting and also offer full time manual focusing. It has a minimum focusing distance of 9.4 (24cm) at all focal lengths. The non-rotating lens barrel perfectly suits the petal shaped lens hood. A circular polarizing filter can also be used conveniently.
Filed under Pentax by on May 1st, 2010. Comment.
Many digital photographers get a little obsessed by the ability that their zoom lenses give them to get in nice and close to their subjects.
While there’s a lot to be said for the power of zoom lenses (in fact many manufacturers are developing cameras with bigger and bigger lenses like the 20x optical zoom on the Olympus SP-570 that was announced this week) photographers who exclusively shoot at the longer focal lengths that their camera and lens offer could be missing out on some wonderful perspectives and framings.
Today I want to present you with 17 shots – all taken with wider focal lengths (mostly with 10mm lenses). I hope these give a little inspiration to rediscover the wider end of your camera’s zoom.
I’ve included the focal lengths of those images with EXIF data that reveal the focal length used.
If you’ve got some wide angle images to share don’t forget to drop by the forum to post some of them for the rest of us to see, be inspired by and learn from.
Further Reading – read more about creatively using the lens distortion that shooting at wide angle lenses can bring in portraits.
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Post from: Digital Photography School – Photography Tips.
Filed under Digital Cameras by on Nov 16th, 2009. Comment.
Here’s a quick video tutorial exploring the topic of focal length of lenses for portrait photography.
I think it’s important to emphasise (as they do at the end of the video) that there are times when it’s good to shoot with a wide angle lens – but there are also some real benefits of longer focal lengths.
The lens being used in the video is a Canon EF 70-200mm f/2.8L IS – one of my own favourite lenses also not only because of the focal length but how fast it is.
Post from: Digital Photography School – Photography Tips.
Which Lens for Portrait Photography?
Filed under Cameras and Equipment, Digital Cameras by on Oct 3rd, 2009. Comment.
Exclusively designed for use with digital SLR cameras featuring APS-C size image sensor. High zoom ratio 11:1. Compact, Lightweight and Durable construction with diameter of 70mm (2.8 in.), length of 78.1mm (3.1 in.) and weight of 405g./14.3oz. Lens has Metal Mount. Minimum focusing distance of 45cm (17.7 in.) at all focal lengths.Compact, Lightweight Superzoom lens, with high zoom ratio 11:1This high zoom ratio lens is exclusively designed for digital SLR cameras and capable of covering a wide range of focal lengths from wide-angle to telephoto. Two Special Low Dispersion (SLD) glass elements and two hybrid aspherical lenses offer the utmost correction for all types of aberrations, and enables this extended range super zoom lens to be housed in a compact and lightweight construction of 70mm (2.8 in.) diameter, and 78.1mm (3.1 in.) in length, and weighing just 405g/14.3oz. The new lens coating reduces flare and ghost, which is a common problem of digital cameras and also creates an optimum color balance. This lens has a minimum focusing distance of 45cm (17.7 in.) at all focal lengths and has maximum magnification of 1:4.4. The lens design incorporates an inner focusing system, which prevents the front of the lens from rotating, making it particularly suitable for using circular polarizing filters and petal shaped lens hoods. The overall length of the lens does not change during focusing, ensuring convenient handling and ease of use. A zoom lock switch eliminates zoom creep during transportation, a convenient addition when traveling.
Filed under Digital Cameras by on Sep 22nd, 2009. Comment.
