今天公布的。
主要特点是加装了宁静马达，内对焦。而且光学系统似乎有所改变，8片7组。估计12月开始发货。
详细内容大家自己看吧。
http://www.dpreview.com/news/0809/08092201nikkor_50mm_1_4glens.aspNikon launches the AF-S NIKKOR 50mm f/1.4G lens
Redefining the standard lens concept
Cologne, Photokina 2008 – Nikon Europe is pleased to announce the introduction of a new wide aperture fixed-focal length NIKKOR lens, the 50-mm AF-S NIKKOR 50mm f/1.4G. This lens has a fast maximum aperture of f/1.4 respectively for a bright viewfinder experience, beautiful background blur with shallow depth of field.
It also incorporates Nikon’s ultra-compact Silent Wave Motor (SWM) ring-type for silent, fast and accurate focusing and enables autofocus in cameras without a built-in motor such as the Nikon D40 and Nikon D60.
"This new fast prime lens redefines the standard lens concept,” said Robert Cristina, Manager Professional Products and NPS at Nikon Europe. He added: “The fast apertures, silent AF and compact dimensions deliver brilliant image quality with new creative options for Nikon digital photographers.”
AF-S NIKKOR 50mm f/1.4G
The AF-S NIKKOR 50mm f/1.4G lens is a fast, fixed focal-length lens with normal picture angle when used with Nikon’s FX-format D-SLR cameras. Its newly developed optical system delivers high performance, as it efficiently corrects sagittal coma flare and chromatic aberration.
The SWM ring type offers smooth and quiet AF operation. Although all lens groups shift during focusing, the front element and filter mount does not rotate and the barrel length does not change, ideal for close-up photography or when using SB-R200 Wireless Remote Speedlight units.
The AF-S NIKKOR 50mm f/1.4G has two focus modes, M/A (manual-priority autofocus) and M (manual focus). With its rounded nine-blade diaphragm, out-of-focus elements appear more natural. When mounted on a DX-format SLR, the picture angle is equivalent to a focal length of about 75mm in 35mm format.
AF-S NIKKOR 50mm f/1.4G lens specifications
Maximum format size 35mm full frame
Focal length 50mm
35mm equivalent focal length
(APS-C) 75mm
Diagonal Angle of view (FF) 46º
Diagonal Angle of view (APS-C) 31º30'
Maximum aperture F1.4
Minimum aperture F16
Lens Construction 8 elements / 7 groups
Number of diaphragm blades 9 (rounded)
Minimum focus 0.45m
Maximum magnification 0.15x
AF motor type • Ring-type SWM
• Full-time Manual Focus
Focus method Unit
Image stabilization • None
Filter thread • 58 mm
• Does not rotate on focus
Supplied accessories • Front and rear caps
• HB-47 Bayonet Hood
• CL-1013 Lens Pouch
Weight 290g (10.2 oz)
Dimensions 73.5mm diameter x 54.2mm length
(2.9 x 2.1 in)
Lens Mount Nikon F only
