Nikkor 24mm 1.4g，拿來拍人像適合嗎?

大光圈就一定適合拿來拍人像(特別是攝影棚內)嗎?

例如，24mm 1.4g，拿來拍人像(特別是攝影棚內)適合嗎?(沒說不能喔)

試想，大光圈不就是指在光源不足下，不需提高ISO值下，依然維持快門速度嗎?既然都在攝影棚內了，像什麼燈光、反光片之類的東西都非常齊備，大光圈鏡頭能有什麼優勢?

dxomark告訴我們:Not applicable (N/A)(不合適)，但他在風景照上十分優異

一般鏡頭的測試報告，總是告訴我們該鏡頭在Vignetting 暗角、MTF (resolution)解像力、色像差（Chromatic Aberration）方面的性能，但一個被評價極高的鏡頭，真的適合每個拍攝主題嗎?

真的每個人都需要花大錢買Nikkor 24mm 1.4g嗎?還是要看你自己的需求(你經常拍攝的主題是什麼)吧?

dxomark針對許多款的鏡頭特別提供了"Use Case Scores"的評分項目，可以讓我們大概知道選擇鏡頭的方式，而不是人云亦云的方式~

別人覺得很好的鏡頭，對你不見得好用，因為他常拍的攝影主題不見得與你的喜好相同

貼這篇文章的主要目的在於，很多人都直覺地講Nikkor 24mm 1.4g是"人像鏡"，但他真的很不適合拍人像(攝影棚)的，希望能用這種方式調整過去一些錯誤觀念~例如，要拍特寫時，就要站得很近，那不是很怪?

只有大光圈鏡頭才能拍出淺景深的人像照片嗎?不盡然吧?

當然，每個鏡頭要用來拍什麼主題都能拍的，只是不適合的鏡頭拿來拍不恰當的主體時，只會有缺憾而已~

空白的部分就是:Not applicable (N/A)(不合適)

>	旅行	人像	運動	報導	風景
24-70mm	4	4	2.5	3.5	3.5
17-35	1.5	3.5		1.5	4
50 1.4g		3.5		2
50 1.4d		3.5		2
35 1.8g		2.5		3	1.5
85 1.4d		4.5	4.5
24 1.4g				3.5	4
105 2.8g		3.5	4.5
s50 1.4		3		1.5
70-200	4.5	3.5	3.5	1.5
18-105	3.5	0.5	1	2	3
s17-70	4.5	2	1.5	3	3
s70-300	4.5	1.5	3.5	1.5

s是指sigma，其他全部是Nikkor，至於其他品牌的鏡頭，dxomark很少有評鑑到Tamron...
其他則是在台灣比較少見的鏡頭，就不特別列了

報導Reportage，這樣翻譯可能不太恰當，但他主要是講利用相機在"講故事"時(例如婚禮、街景)

tell a story related to people’s lives. Wedding photography, photojournalism, street photography, documentary and war photography all fall into this category

難怪24-70mm被人稱之為鏡皇，因為他在各方面的拍攝主題都獲得很高的評價，但要拍運動(例如喜歡到處亂跑的小孩)他卻很不適合了~

資料來源
http://www.dxomark.com/index.php/Lens-with-Camera/Lens-rankings/Optical-Metric-Scores

2011-03-20 22:53 #1

文章關鍵字

bobbyns7

912分

2樓

bobbyns7

個人積分：912分

文章編號：26638391

兩顆長鏡頭都非常適合拍旅行
不適合拍風景?
我疑惑了?

不過反正這些統計是給新手看的吧
一般拍照要換甚麼鏡頭
是自己決定
而非他來告訴我適不適合
就像絕大部分的人不會上來發問
去xx國要帶甚麼鏡頭一樣

波比旅行攝 http://bobbyns7.pixnet.net/blog

Hightemplar

89分

3樓

Hightemplar

個人積分：89分

文章編號：26638641

沒有原文連結...

列表裡有DX鏡也有FX鏡, 那他用那一台機身? 還是他用兩台機身?

這個沒先講清楚, 那列表是列好玩的啊?

https://www.flickr.com/photos/hightemplar/

夏次聊

7分

4樓

夏次聊

個人積分：7分

文章編號：26638867

24mm 1.4G 拿來棚拍會好用嗎?

那特寫的時候不就要靠很近@.@a

yunyunhome

176分

樓主

yunyunhome

個人積分：176分

文章編號：26639024

bobbyns7 wrote:
兩顆長鏡頭都非常適合...(恕刪)

很少有人會用長焦鏡來拍風景照吧?風景照的重點在於盡量容納多一點的場景，因此在拍風景照上廣角鏡才會有優勢~在拍風景照時，風景不會突然有劇烈的變化，你有的是時間慢慢拍，變焦鏡的便利優勢就不明顯了~

這裡"旅行"指的是鏡頭的"應變"要夠快，因為旅行途中的拍攝場景變化很大，比較有彈性的鏡頭比較有優勢

如果是拍人像帶景，那比較偏向"旅行"，而不是"風景"

詳細的說明如下

http://www.dxomark.com/index.php/en/Learn-more/DxOMark-scores/Lens-scores/Use-Case-Scores

Travel & Family
When traveling or enjoying family events, the shooting opportunities are quite broad both indoors and out: landscapes, portraits, group shots, close-ups when sightseeing; and the field of view requirement is very broad, from wide-angle to long telephoto. For this type of use, photographers typically look for a high-power zoom with a good trade-off between all image quality parameters.

The image quality criteria to consider for this use case are:

At least 2.9X zoom within a large focal range (24–300mm equivalent)
Transmission sufficient to achieve a t-stop better than f/4
Reasonable lateral chromatic aberration (10 µm or less on 24x36 mm)
Good sharpness (at least 45 lp/mm on 24x36 mm)
Limited distortion across the focal range (<0.4%)
Limited vignetting (-0.7 Ev or less)
Portrait & Studio
This category encompasses all photographic uses in which light and subjects are generally under the control of the photographer. Lighting is most frequently artificial (tungsten, daylight fluorescent, xenon, flash) and rarely natural, except when large bay or ceiling windows are available. So for most studio environments, the light level is not a problem and the color temperature can be controlled with filtering techniques.

The subject is typically at a reasonable distance from the camera (generally 1 to 5 meters). Given these conditions, photographers tend to use medium focal length lenses (50 to 150 mm).

The image quality criteria to consider for this use case are:

Optimal sharpness (at least 50 lp/mm on 24x36 mm)
Reasonable lateral chromatic aberration (7.5 µm or less on 24x36 mm)
Fast lens with high aperture to control depth of field (f/2.8 or better, T-stop f/3.2 or better)
Some vignetting acceptable (-0.6 Ev or less)
Moderate distortion tolerance (0.5 % or less)
Sports & Wildlife
Shooting sporting events typically requires long or very long telephoto lenses (at least 120 mm). Fast lenses (at least f/4) are preferred, with, for example, a 400mm f/2.8 commonly chosen for sports taking place on large fields (e.g., soccer, rugby, baseball, and football).

Wide apertures are important for two principal reasons:

Background is preferred out of focus, resulting in better subject isolation;
Faster shutter speeds make it possible to freeze the action.
Wildlife photography often involves capturing moving animals from a distance, which equates to somewhat similar lens constraints as for sports (long focal length, high aperture).

The image quality criteria to consider for this use case are:

Long telephoto (120 mm equivalent or more)
Very sharp lens, high resolution (at least 50 lp/mm on 24x36 mm)
Reasonable lateral chromatic aberration (7.5 µm or less on 24x36 mm)
Fast lens with high aperture and transmission (f/4 or better, T-Stop f/3.2 or better)
Limited vignetting (-1 Ev or less)
Moderate distortion tolerance (0.7 % or less)
Reportage
Reportage includes all forms of photography that tell a story related to people’s lives. Wedding photography, photojournalism, street photography, documentary and war photography all fall into this category.

With reportage, photographers typically need a zoom of at least 2.5X, with a field of view ranging from wide-angle to medium telephoto.

The image quality criteria to consider for this use case are:

At least 2.5X zoom within a focal range equivalent to 28–200mm, or fixed focal between 28mm and 50mm
At least f/4 and high transmission to freeze motion (T-stop f/2.8 or better)
Good sharpness (at least 50 lp/mm on 24x36 mm)
Reasonable lateral chromatic aberration (7.5 µm or less on 24x36 mm)
Limited distortion across the focal range (0.4 % or less)
Limited vignetting (-1 Ev or less)
Landscape & Architecture
This Use Case relies on using short focal lenses, as photographers need to capture an entire structure or landscape, or sometimes must include the surroundings of the main subject of interest. The constraints on distortion and vignetting are quite acute; the sharpness should be good as well. Aperture and transmission may be less of a concern, given that high depth of field is often required and that such scenarios are staged mostly outdoors.

The image quality criteria to consider for this use case are:

Focal length equivalent to 35 mm or smaller
Aperture smaller than f/11 for maximum depth of field
Transmission of f/11 or better.
Very low distortion over the focal range (<0.2%)
Very good sharpness (at least 60 lp/mm on 24x36 mm)
Reasonable lateral chromatic aberration (7.5 µm or less on 24x36 mm)
Limited vignetting (-0.3 Ev or less)