CMOS 定 CCD

dswhkg

水晶晶 發表於 2011-10-15 11:32

                               
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波仔做乜問呢D問題呀?

CCD 與 CMOS，但對於大多數的拍友來說，看得到的卻是一顆顆已經整合好的晶 ...

I don't agree on the saying of this paper....

bosnnhaley

回覆 水晶晶 的帖子

謝謝大大無私ㄉ分享,讓我對攝影知識又增長了不少.

dswhkg

定風波 發表於 2011-10-15 11:23

                               
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數碼機既SENSOR,有分COMS 同 CCD 兩種,
請問CHING兩種有乜分別, 應該點揀呢?

In the DSLR market, everyone change to CCD, I don't think you have choice....

Shortly speaking:
CCD is better in picture quality;
CMOS is better in high ISO noise performance, and most importan, it is cheaper

Edited
"In the DSLR market, everyone change to CCD"
should be "In the DSLR market, everyone change to CMOS", the oppositive meaning... haha

waiking

dswhkg 發表於 2011-10-17 12:51

                               
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In the DSLR market, everyone change to CCD, I don't think you have choice....

Shortly speaking:

簡單兼清楚

鳳棲梧

dswhkg 發表於 2011-10-17 12:48

                               
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I don't agree on the saying of this paper....

歡迎賜教!

                               
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dswhkg

回覆 劉晶晶 的帖子

I'm not expert on the sensor, but just not match with my understanding.

Most of the info described in the paper was true, but it was the situation at around 2004, when Canon 300D was released, with a CMOS sensor.
At that time, all DSLR use CCD and only low-end consumer device (e.g. mobile phones) use CMOS.

Now, CMOS wins CCD not only in noise performance, but also better dynamic range etc.
And, most important is: you don't have choice! All of the camera manufactures turn to use CMOS. You can hardly find any camera using CCD now.

dswhkg

回覆 劉晶晶 的帖子

Why CMOS is better now?

1) Cheaper: CMOS use the same production line and equipments as other IC/chips product.

2) CMOS consumes less power, thus generate fewer noise (power -> heat -> noise).
  The mirrorless camera cannot use CCD, because keeps on switch-on the sensor in order to show the live-view, the CCD will become too heat and too noisy.

3) Additional electronic circuit can be built inside the CMOS sensor (while CCD is a pure photon-to-charge conversion device).  
That give a LOT of flexibility to the sensor design, e.g.:
  - additional NR circuit can build inside the sensor, so a preliminary level NR can be implemented inside the sensor, before the signal is sent out (this is what Nikon D3 did, so someone found the RAW of D3 seems had been gone through some NR)
  - In Nikon-1 system, a phase differential AF circuit is build insider the sensor, thus allow Nikon-1 focus very quickly, mirror nor translucent glass is not needed.

kingkong_hk

消費社會， 唔係好就多人買

例如老麥， 明知奶野都照食， 因為平， 同埋可以飽肚

滿足到呢2樣主要要求就贏， 唔需要幾舊水去食塊和牛

希望呢個比喻合理啦…

定風波

cmos越來越popular似乎系事實。
canon sx30系用ccd, 新出sx40都轉埋cmos
據云同sony停止開發ccd都有關

江交樂

CCD/CMOS我都用過,個人覺得CCD發色靚D