[sammy2120]

我想問下各位大佬....
感光元件CCD 同 CMOS有什麼唔同....
2個感光元件的好壞是什麼....
攝影初哥上.....
謝謝各位!!

[tonytony709]

我都好想得到這方面的智識,懇請各位師兄,不嗇賜教.

[Obi-Wan]

http://www.nikondigital.org/articles/canon_fullframe_whitepaper.pdf

page 11 onward

[tonytony709]

好多謝Obi-Wan師兄的指點,但入到個網站,都唔知點搵才是.
唔知有無中文網站,會有有關這方面的知識呢?
希望各界師兄賜教,賜教.

[pongyee]

d 技術層面o既野，你睇到時已經 out 左。

揀部你o岩o既機影相好過啦。

[Obi-Wan]

pongyee

"d 技術層面o既野，你睇到時已經 out 左。"

唔一定, 佢入面有好多 advance 嘢, 一D都唔OUT!

影相E家己經唔似以前, 有好多嘢老人家都要學, 咪再講 "影人用Kodak film", "影景用Fuji film" 呢D OUT 嘢.....

E 家玩影相, 唔識玩 technology, 比人昆咗都唔知, 例如以下MC題有幾多人知 Correct Answer?

1. The coating of either side of lens element inside a lens for DSLR is the same. True or False?
2. CMOS noise is related to temperature. True or False?
3. Your 10MP CAN0N 400D or NIKON D80 is in fact 2.5MP in resolution. True or False?
4. Fuji Super CCD has a better dynamic range than conventional CCD or CMOS. True or False?
5. When u take a 10MP RAW or jpeg file to a photo processing service centre for processing 4R photos, they will resize the photos to about 4MP before processing. True or False?

Enjoy Photography, Learn more

[Obi-Wan]

tonytony709

Sorry, if u wanna learn technology stuff, u have to learn reading English material. or go
http://www.33tt.com/article/2005-04/604.htm
to read an old chinese article

[lambertnh]

試答：

1) False, Coating usually on one side for minimizing production cost

2) False, CMOS noise is not related to TEMPRETURE, but CCD does.

3) Can't say, depends on how you explaine "resolution". Although G-R-G-B Sensor perform "colour interpolation" to generate image.

4) False, on a Single Unit CDD, the D-Range is almost the same

5) Can't say, some will down size but some doesn't

Pls correct

[Obi-Wan]

lambertnh
1) True! The CMOS (in fact the low pass filter) is MUCH more reflective than film surface, so the internal reflection is stronger, that's why some manufacture introduce the lens for DSLR which miminize the internal reflection FROM the surface

Answer to the other questions will be given later in order to give other readers thinking.

[Please don't bug me if u don't believe my answer, u can verify my answer with google]

[Obi-Wan]

tonytony709

please go
http://www.robgalbraith.com/public_files/Canon_Full-Frame_CMOS_White_Paper.pdf

the original site removed the paper

sorry

[lambertnh]

Obi-Wan 兄：

不是死拗，只是減少 internal reflection 跟兩邊的 coating 不一定要相同，兩 coating 相同亦等於能減少 internal reflection。

以有限光學知識理解，請見諒

[Obi-Wan]

lambertnh

the mulitcoating remove internal reflection by the interference, the same coating can minimize the internal & external coating (old lens only multicoated on one side)

[Obi-Wan]

lambertnh

give u the answer of 2nd question => TRUE!

the following is quoted from "CAN0N white paper", check it out

Canon has also altered the conventional three-transistor architecture of CMOS pixels (a photodiode, a MOSFET pixel amplifier and a reset switch for initializing optical charge), which are adversely affected by reset noise (called kTC noise, where k = Boltzmann’s constant, T = operating temperature and C = total capacitance appearing at the input node of the amplifier transistor) caused when the sensenode capacitor is reset.

[tonytony709]

真真真係好多謝各位師兄的提點,尤其是Obi-Wan師兄那份提點後輩的熱情.
很值得人欽佩.
如果這網站能多一些這樣的師兄,就真的是我們的福氣啊.
再次又再次的多謝多謝.

[pongyee]

>> E 家玩影相, 唔識玩 technology, 比人昆咗都唔知,

奧比溫，

我得承認你對這些新科技很有研究，但懂得了這些，對攝影有什麼幫助？

不如信對眼，看看那部機拍出來的電子相符合自己的要求，咁唔會比人昆吧？

什麼 CCD 、 CMOS 與 FOVEON 研究得一清二楚，去到舖頭連價錢都唔知，俾人斬到一頸血，咁就真係俾人昆嘞。