[情報] Sigma 18-35mm F1.8 DC HSM 發表
http://www.dpreview.com/news/2013/04/18/Sigma-announces-worlds-first-F1-8-constant-aperture-zoom-lens
http://tinyurl.com/d9gk9by
===========內變焦喔==========
rincipal specifications
Lens type Zoom lens
Max Format size APS-C / DX
Focal length 18–35 mm
Image stabilisation No
Aperture
Maximum aperture F1.8
Minimum aperture F16.0
Number of diaphragm blades 9
Optics
Elements 17
Groups 12
Focus
Autofocus Yes
Motor type Ultrasonic
Full time manual Yes
Focus method Internal
Physical
Weight 810 g (1.79 lb)
Diameter 79 mm (3.11〃)
Length 122 mm (4.80〃)
Filter thread 72 mm
Hood supplied Yes
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※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.32.132
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