Tamron AF 17-50mm F/2.8 XR Di II LD Aspherical [IF]

by microbug in July 7th, 2008   
Topics: Tamron zoom lenses     Tags: , , , , , , ,

Description:
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 conventional cameras and digital cameras with image sensors larger than 24mm x 16mm.

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.

Model A016
Lens Construction (Groups/Elements) 13/16
Angle of View 78°45′-31°11′ (APS-C size equivalent)
Type of Zooming Rotation
Diaphragm Blade Number 7 (Circular apertures)
Minimum Aperture F/32
Minimum Focus Distance 10.6in.(0.27m)
Macro Magnification Ratio 1:4.5 (at f=50mm MFD 0.27m)
Filter Diameter ø67
Weight 430g (15.2oz)
Diameter x Length ø2.9 x 3.2in.
(ø74.0 x 81.7mm)
Accessory Flower shaped lens hood
Mount Canon AF, Sony/Maxxum AF-D, Nikon AF-D

Sigma 10-20mm F4-5.6 EX DC HSM

by microbug in July 7th, 2008   
Topics: Sigma zoom lenses     Tags: , , , , ,

Description
Designed exclusively for Canon digital SLR cameras, the ultra-wide-angle 10-20mm offers a view from 102.4 to 63.8 degrees, making it ideal for landscape photography and other vast applications. The lens is distinguished by its three special low dispersion (SLD) glass elements, which effectively compensate for color aberration, and its aspherical lenses, which provide maximum correction for distortion and various aberrations. As a result, the lens produces an extremely high image quality throughout the entire zoom range. The HSM-equipped models, meanwhile, produce fast autofocus (AF) speeds and quiet shooting while still letting you perform full-time manual focus. Other details include a minimum focusing distance of 9.4 inches at all focal lengths and an integral petal-type hood to block out extraneous light.
Lens Construction: 14 Elements in 10 Groups
Angle of View: 102.4 - 63.8 degrees (Sigma SD format)
Number of Diaphragm Blades: 6 Blades
Minimum Aperture: F22
Minimum Focusing Distance: 24cm / 9.4 in.
Maximum Magnification: 1:6.7
Filter Size Diameter: 77mm
Lens Hood: Petal Hood
Dimensions: Diameter 83.5mm X Length 81mm
3.3 in. X 3.2 in.
Weight 470g/16.6 oz.

Sigma 10-20mm f/4-5.6 EX DC HSM Lens for Canon Digital SLR Cameras
Price: USD 479.00

5 in stock. Price from USD 479.00

Review:
Pros: Sharpness, WIDE angle, colours, contrast, fast and quiet AF, build quality
Cons: A little CA but compared to the Canon 10-22 I sent back, no worries. The ususal distortion in the corners.

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