| Joined: | Sun Aug 12th, 2012 |
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A little late with this response, but rather than a quick read , I practically " studied " this article and the link to Nikon`s Glass-making facility, the Hikari glass works.
https://www.imaging-resource.com/news/2018/04/17/glass-for-geeks-an-in-depth-tour-of-nikons-hikari-glass-factory
I had thougt that Nikon allways bought glass from Minolta , like many others
I find it an Interesting read indeed , and had no idea that the concept starts with a camera to which a particular sensor is designed..with the most challenging being the D850.
Quote:
This is one area where Nikon's dedicated sensor design has paid off for them: The D850 has the first true ISO 64 capability in an SLR. (Other cameras have special “Lo†ISO settings that will get there, but those come at the expense of poor tonal qualities and blown highlights.) Sanbongi-san told me that they developed the D850's true ISO 64 capability in response to requests from motor-sports shooters, who wanted to shoot at large apertures and slow shutter speeds, so they could pan to follow the race cars while dramatically motion-blurring the background.
I don't know enough about sensor design to understand the details of what's involved, but when I asked Sanbongi-san what his team's proudest achievements were, he mentioned the D850's true ISO 64 first.
End quote !!
And now I know what causes " stuck or hot pixels "
quote :
No Snow: Leaky pixels = stuck pixels!
At the other end of the scale, when there's very little light, we want to make sure that the only electrons in the photodiode got there as a result of incoming photons. It turns out that photodiodes “leak†charge, letting random electrons creep in from the surrounding silicon. This shows up as “hot†pixels that look bright whether light is falling on them or not. Even if a given pixel doesn't stand out on its own, random charge leaking into a sensor's pixels from this so-called “dark current†can be a significant cause of image noise.
(Again, to our more knowledgeable readers, yes, shot noise is a big part of high-ISO noise, and there's nothing to be done about that at a sensor level; it's just math. But minimizing both bulk and surface leakage while maximizing well capacity and maintaining high readout speed is a significant challenge.)
Sanbongi-san pointed to the D5's sensor as a case where they'd maintained excellent quantum efficiency and very low leakage, while still maintaining high readout speeds.
end quote.
However , when it comes to Nikon-pixels, I remembered the following...
From :
https://en.wikipedia.org/wiki/Nikon_D1
Quote :
In a later "behind the scenes" interview published on the Nikon website[7] it was revealed by the General Manager of Nikon's Imaging Development Management Department that the sensor developed for and used in the D1, and subsequently the D1H, actually used 10.8 million photosites rather than the 2.7 million that had previously been suggested. This allowed multiple photosites to be grouped together into units that formed the final pixels in the image, contributing to the sensor's high sensitivity and excellent signal-to-noise ratio.
End Quote.
So I have since learned to look at " Output " in MBytes rather than bother about pixels, especially when it comes to Nikon.
I am convinced that Other manufacturers go through great lengths themselves to make a fine product, yet Nikon has made many innovative contributions , unrivalled by others,beginning with the D1,which Propelled the Entire Pro-oriented photo sector into the realms of Digital photography , as it was Affordable and of High Quality to boot.
Enter those new mirrorless camera`s of which I doubt that they will replace the " Big D " camera`s , but perhaps are a solution for those of us who need something at lower cost..lesser weight , with a capability close to the Big D line-up.
or am I completely out of step with reality....
Last edited on Sun Sep 2nd, 2018 20:09 by novicius
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I do not use my equipment to make photo`s .. I take photo`s to use my equipment
The better I become at photography,the better my camera gets.