http://www.sonyalpharumors.com/competition-news-nikon-announces-the-d5-with-iso3280000/http://www.nikon-image.com/products/slr/d500
http://www.nikon-image.com/products/slr/lineup/d500/D5 goes up to ISO 3280000
http://www.nikon-image.com/products/slr/lineup/d5/Nikon will soon announce the D5. D5 of the specs are as follows.
– Body two types of D5 (XQD-Type) and D5 (CF-Type)
– Effectiveness of the newly developed 20.82 million pixel CMOS sensor
– Image processing engine EXPEED5.4K videos correspondence
– AF 153 points. 99-point cross sensor. F8 corresponding 15 points
– Continuous shooting (continuous shooting up to 200 frames in 14bit lossless compression RAW) 12 frames / sec in the AF / AE tracking
– Continuous shooting speed at the time of the mirror up to 14 frames / sec (AE / AF fixed)
– Regular sensitivity highest ISO102400. Extended sensitivity is highest in Hi5 ISO3280000
– 3.2-inch 2.36 million dot LCD monitor. Touch panel
– Card slot D5 (XQD-Type) is double XQD. D5 (CF-Type) Double CF
– Shutter speed 30 seconds to 1/8000 sec
– Finder field of view 100% (FX). Magnification 0.72 times
– SuperSpeed USB (USB3.0 Micro-B terminal)
– Battery EN-EL18a
– The weight is the battery and the media included, D5 (XQD-Type) is 1405g. D5 (CF-Type) is 1415g
– Released in Date March 2016
Nikon D5 ISO 3280000
http://thenewcamera.com/nikon-d5-full-specification-leaked-features-extended-sensitivity-iso-3280000/好高的 iso 阿
http://photoblog.hk/wordpress/6180/%E4%BA%BA%E7%9C%BC%E7%9A%84iso%E6%9C%89%E5%A4%9A%E5%B0%91%EF%BC%9F一般在黑夜,這數字是15000,這是科學家(這麼權威準確的數字不會是筆者亂說的啦)根據市面上有售的最低的25 ISO菲林,乘以人眼最光和最暗時感敏度相差600倍而計算出來的!。如果拿時下數碼相機以100起跳來計,那這數值就是60000了!(想鑽研一下的朋友可以參考一下這裡,入面有一大堆學術文獻的連結和解說)
其實在自然界,人眼的ISO還不算很強,貓頭鷹在伸手不見五指的黑夜中都能發現遠處的田鼠!現時有最高的ISO的相機分別為兩間相機巨擘各自的旗艦級數碼單反:Nikon D3S以及Canon的EOS-1D Mark IV,ISO高達102,400!比人眼更厲害,在黑暗中人類肉眼看不見的東西,它們都可以看得見
http://photoblog.hk/wordpress/26023/%E4%BA%BA%E7%9C%BC%E7%9A%84%E5%85%89%E5%9C%88%E5%80%BC%E6%98%AF%E5%A4%9A%E5%B0%91%EF%BC%9F根據研究,人眼的焦距大約是 22mm,而一般來說瞳孔最大的物理尺寸約 6-7 mm,因此人眼的光圈值在強光的情況下大約 f/8.3,而低光的情況下則達 f/2.1,但目前還是有疑問,因為如果根據入射光來計算,即我們真正的視覺,眼球會變長,最小 f 值應為 3.2。留意這裏的計算與一般相機不同,因為還要考慮到眼球內充滿液體,光線穿過眼睛與穿過相機是有分別的。
http://pansci.asia/archives/59983猛禽視網膜中的錐狀細胞占了優勢,尤其在每個中央窩裡面,每一平方毫米就有一百萬個錐狀細胞(人類大約只有二十萬個)。因此,猛禽的視覺敏銳度大概超過人類的兩倍。
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視網膜主要是由視杆細胞構成的(人眼視網膜是由視錐細胞和視杆細胞構成),因此夜間的感光度比人的眼睛大100倍。貓頭鷹能察覺到每秒鐘振盪8 500次以上
有一說 貓頭鷹 眼睛夜間比人類 高 100倍 ??