最初由 xulion 发表
尝试翻译了一点，不是很好，大家将就看。
我会补齐后面的部分。
Fisheye: No known uses, except to illustrate fisheye effects in photo how-to books.
鱼眼： 没有已知用途，除了在摄影教科书中演示效果。
Ultra-wide rectilinears wider than 19mm: Occasional interiors. Also used to stump gearheads trying to find stuff to photograph with the things.
广于19mm的超广角直线校正（rectilinears）：偶尔室内使用。也用于寻找被摄物体。
Ultra-wide-angle (19, 20, 21, or 24mm): One of the four of five essential lenses for pros, broadly useful for artists and accomplished amateurs. Used for landscapes, interiors, street shooting, crowd shots, etc. Also used by bored amateurs as the next thing to covet for purchase. Despite the ubiquity of this focal length, relatively few photographers are practiced enough or visually acute enough to use this type of lens effectively; lots more people own these than do good work with them. See Brian Bowers’ Leica books for a rare example of a scenic photographer who actually sees well with a 21mm.
超广角(19, 20, 21, or 24mm)：专业人员最基本的镜头之一， 广泛地被艺术家和熟练的爱好者使用。用于风景，室内，扫街，人堆（拥挤的），等等。同时也被无聊的爱好者作为下一个购买目标。尽管这个焦段随处可见, 能够熟练且精准地使用它的摄影师却不多; 更多的人只是拥有罢了. 在Brian Bower的 Leica books可看到一些罕见的绝佳的使用21mm拍摄的风景照片.
Ultra-wide-angle zoom (wide end 20mm or wider): useful for when the photographer would like to carry one heavy lens instead of three light ones, or has a breezy, devil-may-care attitude towards flare effects. Secondary “CYA” lens for pros who aren’t great with wide angles in the first place. (Exceptions do exist.) Also sometimes paired with a fast 80-200mm zoom as a professional’s only two lenses.
超广角变焦（广角端20mm或更广）：当摄影师希望携带一个重镜头而不是3个轻的时，是很有用的，或者当摄影师对耀斑（flare effects）不是很在意的时候。也可以作为对广角不太擅长的专业人士的第二个“CYA”镜头。(确实也有例外.) 有时和一个快速的80-200mm变焦配对--作为一个专业摄影师仅有的两个镜头.
Wide angles: Now that 24mm is more often lumped with 20mm and 35mm has become an alternative “normal” focal length, this class has contracted down to one fixed focal length, 28mm. Useful as a do-anything lens (especially for street and art photography, photojournalism, faux photojournalism, and environmental portraits) where a wide “look” is desired, and/or to complement a 50mm main lens, and/or for pressing into service in place of a super-wide when the photographer does not own same.
广角: 现在24mm更多地和20mm,35mm一起成为"常规"角段的另一选择. 这个等级的镜头浓缩为了一个定焦:28mm. 一个有用的当摄影师希望广视角时的万能镜头 (特别适合扫街, 艺术, 新闻摄影, 伪新闻摄影(faux photojournalism), 环境肖像), 或者作为50mm标头的补充, 或者当摄影师没有超广角的时候顶替一下.
Shift lenses: Buildings. Used for the overcorrection of convergence caused by perspective.
透视控制镜头(Shift lenses): 建筑物. 用来校正视觉透视导致的收敛(倾斜).
All-purpose 28-200mm zoom lenses: Bad snapshots. Also great for making five rolls of film last a whole year. All-purpose = no purpose.
28-200全能变焦镜头: 劣质的用于照快照的镜头. 一年五卷胶卷, 全能=无用.
Wide normal primes (35mm): Alternative normal. Often, the thing replaced by a zoom. Easiest focal length to shoot with. Best focal length for Leicas.Not really "wide" by today's standards, 35mm is an alternative normal. Leica M6, 35mm pre-ASPH., Ilford XP-2.
常规广角镜(35mm): 备选的常规镜头. 它经常被变焦头替代. 最容易掌握的拍摄焦距. Leica最好的焦距. 相对今天的标准而言, 不是足够的"广", 是另一种常规镜头.
Normal/standard (50mm): Useful for taking photographs, if you have a thick skin. When used exclusively, classic “hair shirt” lens for disciplining
oneself needlessly. Strangely, when in skilled hands, can mimic moderate wide angles as well as short telephotos. According to one far Eastern
expert, lower yield of usable shots than 35mm lens, but higher yield of great shots. Second best focal length for a Leica.
常规/标准(50mm): 用来拍照, 如果你脸皮够厚. 当单独使用时, 用于训练自己的经典“hair shirt”镜头就不再需要了. 奇怪的是, 当有技巧的使用它时, 可以营造中度的广角和短长焦的效果. 根据一位远东的专家所言, 使用此镜头的产出低于35mm, 但是好照片产出却高于. Leica的第二好焦距.
Standard 55–58mm: Shows you use a really, really old camera.
标准55-58mm: 展示你正在使用一款很很老的相机.
Macros/micros: Flowers, bugs, eyeballs, eyelashes, small products, tchotchkes. Dew-covered spider webs, frost patterns on windowpanes. Great hobby
lenses, as macro photographers are among the only happy photo enthusiasts. Also much utilized by photography buffs who like to test lenses.
微距: 花, 虫, 眼球, 睫毛, 小物品, 小装饰, 挂着露水的蜘蛛网, 窗玻璃上的霜花. 鉴于微距摄影师是幸福的狂热摄影爱好者的一员, 它是很好的爱好镜头. 同时总是被摄影迷们拿来测试镜头.
Superfast normals (ƒ/1, ƒ/1.2): Used for people who like limited depth of field, as well as for people who like to complain about limited depth of
field. Also, especially when aspherical elements are involved, an effective way to vaporize excess cash for almost no good reason.
超高速常规(ƒ/1, ƒ/1.2)：当人们需要有限的景深的时候使用，同样适合哪些总是对景深有抱怨的人士。当引入了非球面镜片后，便成了一个有效的，没有理由的，快速蒸发你的金钱的途径。
Standard zooms (35-70mm, 28-105mm, 35-135mm, etc.): Used for taking pictures in bright light—mainly snapshots, scenics, cars, travel pictures, seminaked women, underexposed pictures, and pictures blasted by uncontrolled on-camera flash. Evidently very useful for clichés. Sometimes used to remove interchangeability feature from interchangeable-lens cameras.
标准变焦头(35-70mm, 28-105mm, 35-135mm, 等等.): 用来在明亮的光线环境中拍摄快照（留念照？），风景，汽车，旅行图片，半裸女人，曝光不足的照片，和被没有控制的内置闪光破坏了的照片。显然对那些陈词滥调般的玩意儿是很有用的。有时也用于去除可交换镜头相机的镜头可交换特性。
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