[江湖傳閒] 罪大2014年推出五千四百萬像素 A9R

轉貼 http://www.mobile01.com/topicdetail.php?f=254&t=3758782&p=1

The recent rumor published at Japanese magazine suggest that Sony may announce A9 and A9R camera this year, we also published the Impress Japan / nippon magazine predictions last year and approx 50% of the rumor were true (see 2013 predictions here and here) now take a look at the rumored specification below

Sony A9 / A9R Rumored specification
54 MP Full Frame Exmor CMOS Sensor
Dual BIONZ X Image Processor
Dual memory card slots

The rumor look bit true to me because Nikon D800 / 800E already pushed FF megapixel limit to 36MP last year (with Sony made sensors), According to rumors Canon is also testing a Megapixel Monster FF sensor camera (see here), so we may sure see a 54MP model from Sony in 2014.

===不負責任之谷哥翻譯=====================
在日本雜誌最近公佈的傳聞表明，索尼可能會在今年宣布A9和A9R相機，我們還出版了Impress的日本/日本雜誌預測，去年約的傳聞50％是真實的（見這裡和這裡2013預測）現在採取一起來看看下面的傳聞規格

索尼A9/ A9R據傳規範
54萬像素全畫幅Exmor CMOS成像傳感器
雙BIONZ X圖像處理器
雙存儲卡插槽

謠言看看位真我，因為尼康D800/800E已經被推FF萬像素的限制36MP去年（與索尼製造傳感器），據傳聞佳能也在測試一個百萬像素怪物FF傳感器攝像頭（見這裡），所以我們可以肯定看到一個54MP模型索尼在2014年。

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akitohk

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發表於 2014-2-4 22:59 | 只看該作者

lol

一張135 菲林是否大約相等於3x mp既解像力？

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ymlau0602

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發表於 2014-2-4 23:04 | 只看該作者

本帖最後由 ymlau0602 於 2014-2-4 23:07 編輯

lol

一張135 菲林是否大約相等於3x mp既解像力？
akitohk 發表於 2014-2-4 22:59

87 Megapixels

http://www.kenrockwell.com/tech/film-resolution.htm

The Digital Resolution of Film

So how many pixels does it take to describe all the detail we can get from film?

Fuji Velvia 50 is rated to resolve 160 lines per millimeter. This is the finest level of detail it can resolve, at which point its MTF just about hits zero.

Each line will require one light and one dark pixel, or two pixels. Thus it will take about 320 pixels per millimeter to represent what's on Velvia 50.

320 pixels x 320 pixels is 0.1MP per square millimeter.

35mm film is 24 x 36mm, or 864 square millimeters.

To scan most of the detail on a 35mm photo, you'll need about 864 x 0.1, or 87 Megapixels.

But wait: each film pixel represents true R, G and B data, not the softer Bayer interpolated data from digital camera sensors. A single-chip 87 MP digital camera still couldn't see details as fine as a piece of 35mm film.

Since the lie factor factor from digital cameras is about two, you'd need a digital camera of about 87 x 2 = 175 MP to see every last detail that makes onto film.

That's just 35mm film. Pros don't shoot 35mm, they usually shoot 2-1/4" or 4x5."

At the same rates, 2-1/4" (56mm square) would be 313 MP, and 4x5" (95x120mm) would be 95 x 120 = 11,400 square millimeters = 1,140 MP, with no Bayer Interpolation. A digital camera with Bayer Interpolation would need to be rated at better than 2 gigapixels to see things that can be seen on a sheet of 4x5" film.

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恆星~