我愛定焦頭 | I ♥ Prime Lens

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About 我愛定焦頭 | I ♥ Prime Lens

爱上定焦镜头的6个理由

1.实惠的价格
　　一般来说，定焦镜头要比变焦镜头的价格更低廉，相对变焦镜头，一只Prime Len采用更少的镜片组以及更简单的结构设计，一般来说，最出色的定焦镜头只有变焦镜头的一半价格，尤其是50mm焦段，几乎是各家最便宜的镜头焦段
　　
2.较小的畸变
　　畸变是变焦镜头最大的软肋，几乎所有涉及广角的变焦镜头都存在明显的畸变问题，而定焦镜头因为只需对一个焦段的成像进行纠正与优化，所以往往很少会出现畸变现象；另外值得一提的是，旁轴相机在广角畸变上比单反相机有天生优势，例如15mm/f4.5等超广角镜头甚至完全不存在畸变
　　
3.更锐利的成像
　　简单的镜片结构自然会带来更锐利的图像，尤其是那些含有ASPH非球面镜片的定焦镜头，在最大光圈下也能提供极为锐利的焦内成像
　　
4.柔美的焦外（Bokeh）
　　在相同价格下，定焦镜头可以比变焦镜头提供更大的光圈（事实上变焦镜头的极限光圈便是F2.8），也就意味着更柔和的焦外虚化（Bokeh）效果，除此之外，定焦镜头的光圈叶片更多，接近圆形的光圈会提供最漂亮的Bokeh
　　
5.暗光环境下的适应能力
　　如果你从来没有用过F1.4镜头，你会错过很多在暗光环境下绝佳的拍摄机会 —— 室内音乐会、光线幽暗浪漫的咖啡馆、入夜的街头...不过，不推荐追求F1.2以下的光圈，这种极端大光圈镜头除了价格昂贵，满足你的虚荣心外，对你的作品没有任何裨益
　　
6.定焦镜头让你思考
　　使用定焦镜头就如同戴着枷锁跳舞，你必须要付出更多的努力：你需要用心去琢磨构图的方式，你需要寻找最适合你拍摄的角度与距离，你需要开始使用光圈获得恰到好处的景深，而非沉溺于浅景深的虚化...变焦镜头很好，很方便，但是一颗定焦镜头，将把你的摄影带向另一个全然不同的层次——思考。
　　
　　第一流的摄影师都有自己最钟爱的焦段，Marc Riboud（马克 吕布）擅长35mm；Henri Cartier - Bresson（布列松）常用50mm，而我们非常喜欢的Trent Parke早期一直在使用一只Elmarit 28mm...

你最喜欢哪一个焦段呢？





6 Reasons To Love Prime Lenses

1、LOWER COST

For the same quality, prime lenses cost less than zoom lenses. They contain fewer elements, less moving parts, and their design is simpler. For the same cost, you can pick up a half-decent zoom lens or you can pick up an outstanding prime lens.

2、 FEWER LENS DISTORTIONS

Zooms are designed to work well at most focal lengths in their range, but the all display some type of lens distortion at some point — usually at the extremes. Primes, on the other hand, are designed to work great at a single focal length. The distortions have been minimized by design.

3、SHARPER IMAGES

Similar to the argument for lens distortions, primes have been optimized for sharpness and clarity while zooms must sacrifice these things in order to offer up the convenience of multiple focal lengths.


4、 NICER LOOKING BOKEH

Generally, as you lower your f-number your bokeh becomes more apparent. Primes are notorious for producing crazy bokeh on specular highlights when shot wide open. Primes will also generally have better and/or more aperture blades, thus giving you a better bokeh.

5、LOW LIGHT CAPABILITIES

If you’ve never shot with a f/1.4 (or faster) lens, you have no idea what you’re missing. Indoor shots — no flash, no problem. Concerts — fast lenses are a must.

6、THEY MAKE YOU THINK

I suppose my favorite thing about prime lenses is the fact that you have to use your head. Composition becomes a thinking game. You have to move your feet to get that shot you had in mind, so you really start to evaluate what’s important in the scene. Fast primes also make you think a little harder about your f-number. The DOF can be extremely shallow; sometimes too shallow to produce an effective shot. Not only that, but on bright sunny days, you actually can’t use the lens wide open without an ND filter because you’ll let in too much light and max out your shutter speed.

So if you don’t have a good prime lens, you’re really missing out. Zooms are fine, and they have their place, but a prime will open your eyes to a whole new level of photography.