[kllukdc]

請教以下terms:
OIS
電子防手震與
光學防手震

OIS 是否光學防手震一種?
光學防手震是否又分用鏡或者CCD移動去補賞手震??

那種最好?請提供代表相机

Canon 800IS 可以嗎?

[alwinyu]

OIS
電子防手震與
光學防手震

OIS 是否光學防手震一種?
YES

光學防手震是否又分用鏡或者CCD移動去補賞手震??
YES


那種最好?請提供代表相机

Canon 800IS 可以嗎?

Canon, panasonic 用鏡防手震 (IS system & OIS system)

KM AS system 用CCD防手震 like D5D, D7D
AS system is very good to DSLR camera, because the lens do not need to have optical anti-shaking system, all attached lens can get advantage from the AS system. so the lens will be alots cheaper.

[Banon]

防手震秘笈

[balance01]

想問問 Banon 兄,

(1) 係唔係高 ISO 就完全唔使理防手震?

(2) 如果日光日白, 拿個 380mm zoom lens 去影野, set 高 ISO後, 都係唔使防手震系統?

(3) 點解 DSLR 咁高 ISO, 都要有防手震鏡頭?


請指教.

[Banon]

(1) 係唔係高 ISO 就完全唔使理防手震?
A>唔係, 要高 ISO又少noise至得. o個D好多noise 機就唔得啦! :P e.g. Panasonic FX01

(2) 如果日光日白, 拿個 380mm zoom lens 去影野, set 高 ISO後, 都係唔使防手震系統?
A>係,日光日白如果用f/2.8都有1/500~1/1000 sec, 手震冇問題.

(3) 點解 DSLR 咁高 ISO, 都要有防手震鏡頭?
A>因為室內影相又唔想用閃燈、大光圈同冇腳架.

[alwinyu]

ISO is related to shutter speed. therefore, if you use high ISO, you can use faster shutter speed and get a clear image.

係唔係高 ISO 就完全唔使理防手震?

you still have to take a look at the shutter speed, for a DC shutter speed is safe enough from 1/60 -1/100 depends on the object and zoom.

如果日光日白, 拿個 380mm zoom lens 去影野, set 高 ISO後, 都係唔使防手震系統?

you won't set high ISO at sunny day. you should adjust the aperture in order to get a safe shutter speed to avoid anti-shaking.

點解 DSLR 咁高 ISO, 都要有防手震鏡頭
because high ISO must have noise, also even you put your camera on a tripod, vibration is still exist.

[balance01]

我冇用過 300mm 以上 zoom 架, 聽人講話高 zoom 好易震之嘛, 係唔係 高 zoom 時, 安全快門要快?架?

[Banon]

安全快門=1/(focal length) sec

[Philippe]

"點解 DSLR 咁高 ISO, 都要有防手震鏡頭"

DSLR的高iso noise絶對比任何輕便DC低.問題係高iso都係有限度的.光線暗或焦距長就算開到iso 1600都去唔到安全快門,咁就需要防震喇.你留意下Sony已經sale緊防震加高iso.

[pingu_hk]

1/{effective focal length} is a rough value, vertical holding usually needs higher shutter speed

[Banon]

pingu_hk:
What is vertical holding?
Thanks

[ELIZABETH]

用中文la,

即係安全快門,

比如focal@30mm, 安全快門在1/30!

[ELIZABETH]

"vertical holding usually needs higher shutter speed"

唔一定vertical,
horizontal都包括ga...ha

[靚蝦王]

1. 用 dslr都唔會成日用到 iso1600......
2. 仲有, 用閃光燈都可以用防手振架
3, 高iso唔可以取代防手振, 相反都係
4. 用 dc 或 dslr都好, 都唔會成日專登用高iso, 因為高iso produce多d noise, 無論係dc or dslr都會 (影某d效果例外)
dslr 防振都好有用, 尤其係你影平常生活照時, 你唔會帶住tripod (i mean 街外0個陣), 夜晚唔夠光時就算你推高iso, 都未之可以到到安全快門, 加左閃燈可以幫人補光, 但背景唔得, 用埋防手振張相就可以靚好多~
仲有推高so都唔光的話, noise仲恐怖

[pingu_hk]

Banon

usually when people hold this/her DSLR for shooting portrait photos without the vertical grip attached to the camera, the right hand is up above the head, so vibration is more easily than shooting landscape photos because in this case, the right & left hands are around the chest, so less vibration.

For me, even vibration with a 90mm lens in vertical shooting with 1/250s, but the vertical grip help a little.

靚蝦王
> 仲有, 用閃光燈都可以用防手振架

yes, but the background will be too dark

IS is a MUST.