[tomcat6753]

我打算買Sigma 長短鏡連外影袋禮盒套裝支長鏡,Sigma 55-200mm,F4-5.6
想問下可唔可以這支長鏡做出淺景深的效果,(想影人像).
希望支位高人指點.

[RudiWong]

其實光圈夠大,不用長鏡都有那效果,數碼相機要長鏡全因為光圈不夠大,要用長對焦令焦點收細到主體令效果加強!
各位高人是不是這樣呢?

[Jacky DC]

If you want good 淺景深 effect, you should find a lens with large aperture, such as with f/2.8 or f/1.8. You should not rely on long distance zoom. If you take portrait for your girl friend or private shooting, there will have sufficient long distance for you to zoom, but if you play photo club, certainly there is no sufficient distance, if you play heavy zoom, what you get is just the head.

85mm f/1.8 is one of the considerations. The price is just $2xxxx.

[sasasasa]

200mm焦距已是理想的人像鏡,光圈大小已屬是次要.

[Jacky DC]

TomCat6753, please check PM.

[Philippe]

如果目的只係做淺景深,大光圈比較好.大光圈令快門加快容易影得銳利的相片.反之長焦距需要快快門去防止手震.你支鏡光圈又細,相對下要比較光的環境才用到.

[tomcat6753]

感謝各位高人指點~!

[dindindy]

光圈越大（ｆ數字越細），景深越淺，即係相片中焦點前後清晰的地方越少。同一光圈設定之下，主題越近鏡頭，景深越淺。又同一光圈設定之下，鏡頭焦距越長，景深也越淺。

[征西大將軍]

200MM或以上影人像不太好，因為減去了透視影出來的人臉會沒有立體感，攝人像比較常用的是大光圈的85mm-135mm鏡頭。

[yoyobobo]

各位大大，小弟係攝影新手
想問d野
我用 350D canonEF28-135 f.3.5-5.6 is usm
可否影人淺景深呢?
canon 支50mm f.1.8 好唔好呢?
Q1 :tamron sp af 90mm f.2.8 (marco)可否影人像淺景深?
Q2: canonEF75-300 is usm可否像淺景深?
各位 高人指教.

[NaHO]

嘻>.<
要影淺景深其實冇你(/地)諗得咁難

以 Sigma 55-200mm,F4-5.6 為例
我覺得用來玩淺景深一定好夠。
反而要擔心o既係用 55mm F5.6 時景深唔夠多
咁可能會出現塊臉影得清 上半身唔清o既情況...
以我經驗用 55mm F4.8 景深都算淺，所以 50mm f.1.8 我估都得 ...

[yoyobobo]

多謝意見.
我用 350D canonEF28-135 f.3.5-5.6 is usm
可否影人淺景深呢?

[Rick Chan]

Your len with 350D will be 29.6-216.
To get short depth of field, it is depend on using long focal length. To open iris will make depth of field more shortly.The distance of cammera and model also affact the depth of field.

I think you len is good enough. Just enjoy the fun of shooting!

[yoyobobo]

thanks Rick chan