Friday, October 28, 2011
Sigma 800mm f/5.6 EX DG HSM APO Ultra Telephoto Lens for Canon SLR Cameras
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Sigma 800mm f/5.6 EX DG HSM APO Ultra Telephoto Lens for Canon SLR Cameras Review
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Sigma 800mm f/5.6 EX DG HSM APO Ultra Telephoto Lens for Canon SLR Cameras Feature
- Dedicated to Canon AF SLR cameras
- Uses an ultraquiet hyper-sonic motor (HSM)
- Two extraordinary low dispersion (ELD) glass elements, which help reduce chromatic aberration
- Optic materials are lead- and arsenic-free ecological glass
- Rear rotary filter holder for easy use of polarizing filters
Sigma 800mm f/5.6 EX DG HSM APO Ultra Telephoto Lens for Canon SLR Cameras Overview
It is an Apochromatic ultra-telephoto lens with a fast F5.6 maximum aperture, and incorporates two Extraordinary Low Dispersion glass elements (Abbe number 90.3), to reduce chromatic aberration to minimum limit. It also incorporates internal focusing which enables responsive and fast auto focus speed. ELD Glass elements ensure high quality images Incorporating two Extraordinary Low Dispersion glass elements to reduce chromatic aberration to a minimum and ensure sharp, quality images. HSM The HSM models (Sigma, Nikon and Canon mounts) provide high-speed, ultra-quiet AF function as well as full- time manual focus override. It features a drop-in filter This new lens also supplied with a 46mm gelatin filter holder at the rear, allowing the use of gelatin filters. Inner focusing Inner focusing retains external dimensions for ease of handling. Optional Sigma tele-converter By adding Sigma?s dedicated APO EX Tele Converter 1.4x and 2x, you can use this lens as a 1120mm F8 MF, or a 1600mm F11 MF lens respectively.
Sigma 800mm f/5.6 EX DG HSM APO Ultra Telephoto Lens for Canon SLR Cameras Specifications
The Sigma 800mm f5.6 EX HSM APO ultratelephoto lens incorporates two extraordinary low dispersion (ELD) glass elements, which help reduce chromatic aberration to the minimum limit. With a fast f5.6 aperture, this apochromatic lens also incorporates an internal focusing system to give you fast, responsive autofocus speed. The ultraquiet hyper-sonic motor (HSM) lets you shoot pictures without disturbing your subjects. Polarizing filters are extremely easy to use with this lens because of its rotary filter holder, located in the rear part of the lens barrel. The optic materials are lead- and arsenic-free ecological glass. This model is dedicated to Canon AF SLR cameras.
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This post was written by: Franklin Manuel
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