|Lens Construction:||17 elements in 12 groups|
|Angle of view (SD1):||76.5°-44.2°|
|Minimum focusing distance||11in|
|Dimensions (Diameter x Length):||3.1 inches x 4.8 inches|
|Number of diaphragm blades:||9 (rounded diaphragm)|
|Maximum magnification ratio:||1:4.3|
Preorder your Sigma 17-70mm f/2.8-4 DC Macro OS HSM / DC Macro HSM Lens at B&H.
The creation of these new categories comes with the introduction of three new lenses:
New user-control tools and software, and new quality control measures
The new Sigma Optimization Pro software and USB Dock are designed exclusively for the new lenses within the new product lines. They will enable Sigma users to connect their lenses to their computers to update lens firmware and fine-tune focus parameters via easy-to-use, on-screen controls.
All of these new lenses will also be subject to Sigma’s new, proprietary modulation transfer function (MTF) measuring system called “A1.” Named in honor of the company’s sole production base, the Aizu factory in Aizu, Japan, the A1 system will allow inspectors to verify previously undetectable high-frequency details in each lens before it is shipped.
“We used to measure lens performance with a MTF measuring system using conventional sensors, but this new A1 system uses our own 46-megapixel Foveon direct imaging sensors,” said Yamaki. “We view this new method of performance evaluation as being incredibly important, not only because we owe it to our customers, but because we owe it to ourselves. We’ve spent more than 50 years perfecting our design and manufacturing processes, and now we deliver a complete package by closing the loop on that commitment to quality by adopting a more stringent verification process.”
Adobe News Arca Swiss News Datacolor News Delkin News DxO News Gitzo News Lastolite News Lensbaby News Lexar News Manfrotto News Metz News Lowepro News PocketWizard News Redrock Micro News Samyang News SanDisk News Schneider Kreuznach News Sigma News Tamron News Think Tank Photo News Tokina News X-Rite News Zeiss News
Deals & Shopping News
Photography Deals (No Photography Deals)
Canon Deals Nikon Deals Sigma Deals Tamron Deals Tokina Deals Memory Card Deals Adobe Deals Lowepro Deals Think Tank Photo Deals
In Stock Notices Canon Preorders Nikon Preorders
Canon Refurbished Cameras and Lenses
Nikon Refurbished Cameras and Lenses
Canon Camera and Lens Rebates
Nikon Camera and Lens Rebates
Tamron Lens Rebates