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[:003:] 可能係最輕o既 400/2.8 AF 鏡頭! (◕‿◕✿)

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[:003:] 可能係最輕o既 400/2.8 AF 鏡頭! (◕‿◕✿)

文章發表人 motobee 發表於 2018-06-28, 08:37

Sony's 400mm F2.8 G-Master will arrive in September for $12,000
Published Jun 27, 2018

https://www.dpreview.com/news/611870529 ... for-12-000

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Sony's previously announced 400mm F2.8 GM OSS received a full introduction today. The pro-grade lens will ship in September for $12,000, and aims to deliver superior autofocus and handling. The lens is a (relatively speaking) light 2.7kg / 6.4lb, and Sony claims it's well-balanced for monopod or even handheld shooting. The company also says that its FE 400mm takes advantage of two new linear motors with 5x faster tracking performance on the a9 compared to the 300mm F.8 G2.

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Unlike the 500mm F4 for A-mount, which was front heavy, most of the glass in the new 400mm F2.8 GM is in the center and rear of the lens.

Optical stabilization is offered in three different modes, the third of which is designed to make framing easier when following moving subjects. The lens is made of magnesium alloy for durability, and a drop-in filter slot accepts 40.5mm filters – including a new circular polarizing filter that will go on sale in December.

Firmware version 3.0 for the a9 is also announced, mainly adding support for the 400mm as well as the ability to record camera serial numbers to EXIF data.

For more on the 400mm F2.8 GM, read our first impressions and take a look through our Major League Soccer match sample gallery below.

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Sony FE 400mm F2.8 GM OSS specifications

Principal specifications
Lens type Prime lens
Max Format size 35mm FF
Focal length 400 mm
Image stabilization Yes
Lens mount Sony FE

Aperture
Maximum aperture F2.8
Aperture ring No
Number of diaphragm blades 11

Optics
Elements 23
Groups 17
Special elements / coatings 1 fluorite and 3 ED elements, Nano AR and fluorine coatings

Focus
Minimum focus 2.70 m (106.3″)
Maximum magnification 0.16×
Autofocus Yes
Motor type Linear Motor
Full time manual Yes
Focus method Internal
Distance scale Yes
DoF scale No
Focus distance limiter Yes

Physical
Weight 2895 g (6.38 lb)
Diameter 158 mm (6.22″)
Length 359 mm (14.13″)
Materials Magnesium alloy
Sealing Yes
Colour White
Filter thread 40.5 mm
Filter notes Drop-in filters
Hood supplied Yes
Hood product code ALC-SH155
Tripod collar Yes
motobee
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2004-11-26, 13:00

Re: [:003:] 可能係最輕o既 400/2.8 AF 鏡頭! (◕‿◕✿)

文章發表人 peterso 發表於 2018-06-28, 20:46

dead guard nikon :whistling: :whistling: :whistling:
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peterso
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2004-11-16, 18:33


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