[REI]

呢d 野 部 dc 到我識ｓｅｔ
但實際點用?
個說明書又無較
咩情況下用?
請指教
thanks

[tam_dominic]

曝光補償
+ or - exposure value based on the DC meter

飽和度
value 255 is full color. value 0 is no color.
飽和度 is that value.
The higher the value the richer the color.

對比度
bright vs dark.
The higher 對比度 the less (grey) tone in between

Happy shooting !

[citycathk]

ISO: ISO = 感光度, 同一光圈快門下 ISO 越高拍出來的亮度越高.
但 ISO 越高, Noise 都越高. 高ISO 係低光源無腳架情況下用.

曝光補償: 曝光補償係 光圈先決, 快門先決, 自動 模式下先有用，
當你相信相機估計出來的曝光值有錯時，就用曝光補償調教．

飽和度 , 對比度：　要看自己的Style, 飽和度高色彩越鮮艷，越低
越似灰色．對比度越大 黑同白的分別越大, 越低 則 黑白 分別越少
(兩邊都向灰色行近)

[REI]

thanks tam_dominic


唔夠光or 太光就用 曝光補償

咁飽和度同 contrast點用架?

iso 又係咩? 好似同曝光補償 差唔多?right?

[tam_dominic]

ISO
Industrial Standard Organization
Here refer to the sensitivity of light on the film / CCD / CMOS sensor.
50 is less sensitive so need longer exposure and/or larger F stop
100 is normal eg F11 , 1/125 second for outdoor sunny day.
400 is of higher sensitivity.
800 is even more sensitive to light.eg F11, 1/1000 second for outdoor sunny day.

[REI]

thanks citycathk, tam_dominic
我諗我大概明白 , 只欠實際拍攝

簡單d 來講 越暗既情況下iso 應越高?返之太源充足就唔使咁高 iso?

仲有咩叫影像noise r?

[tam_dominic]

好似同曝光補償 差唔多?right

The DC decide shutter speed and F stop base on the ISO
Under the same lighting :
iso 100 the DC decides to use F11 1/125 second
iso 200 the DC decides to use F11 1/250 second
iso 400 the DC decides to use F11 1/500 second

曝光補償 is after the Fstop and shutter is decided by the DC and you want to force expose more or less.


咁飽和度同 contrast點用架?
All depend on your taste but exaggerating would give un-natural look.

[Velsper]

飽和度 , 對比度我唔建議係相機度set
因為photoshop可以做到~
(有時間自己試下最容易明白---dc嘛...)

[REI]

thanks tam_dominic !!
好詳盡既解釋...一下子變左做專家 tim =p

[citycathk]

Noise = 微粒, 相上面 一 粒粒的 彩點
Noise 大時 呢d 微粒 越容易比人看到

[tam_dominic]

仲有咩叫影像noise r?

When the light hit the CCD / CMOS, a signal is generated.
That signal is not strong enough for processing so an amplifying circuit is a must to amplify the signal at the same time the non light generated signal is also amplified. In general smaller CCD needs more amplify thus more noise would be induced.

In the image the noise is dots (blocks) which should not be part of the image. This is very commonly found in under exposed area and long exposure night shots.


Happy shooting !

[REI]

唔該 3 位~~~
影相新手都睇下la...好有用!