此外摄影家钟爱定焦镜头还有另外两个原因。
There are two other reasons why prime lenses are the available-light photographers' friends.
我使用定焦镜头，而不是变焦镜头。
考虑使用定焦镜头。
50mm的定焦镜头总是摄影者的最爱，对于肖像、产品摄影和在弱光条件下表现完美。
The 50mm prime lens is often a photographer's favourite, perfect for portraits, product photography and low light conditions.
市面上有种类繁多的镜头，但Gampat推荐首次购买单反的摄友从简单的50mm定焦镜头入手。
There are many, many different lenses available, but Gampat recommends that first-time DSLR owners start off with a simple 50mm prime lens .
50mm定焦镜头在较大价格范围内的平均光圈是F1.4，便宜的（镜头）光圈为F1.8，较贵的（镜头）光圈为F1.2。
The 50mm prime on average allows an aperture around F1.4 on a mid ranged price lens, F1.8 on the cheaper ones and F1.2 on the pro series.
在我心目中，我认为在有着众多高质量的变焦镜头时使用“定焦”镜头是无意义的事情。
In my mind, it was pointless having a "fixed" lens when there were so many good quality zoom lenses around.
很多时候被误解为对焦快的镜头-_-我个人喜欢佳能50毫米定焦1.4光圈或者1.8光圈镜头。尼康也有相同型号标准高速镜头可以在室内或低光条件拍摄时，提供高品质的图像。
I like the Canon 50mm 1.4 or 1.8 (I'm sure there is a comparable Nikon) a faster standard lens will allow you to take great food shots when you are indoors or when less light is available.
作为视野稍微大于50mm定焦的镜头，35 mm镜头在拍摄风景和远景时提供了更多的灵活性。
For a slightly wider view than a 50mm prime, a 35mm lens offers more flexibility when shooting landscapes and vistas.
研究结果表明：回波强度受导引头光路中光学镜头的相对孔径、摄像管靶面倾斜和离焦的影响较大；扫描激光光束的入射角等因素对回波强度也有一定的影响。
Research results show that the relative aperture of optical lens, the incline and defocusing of reflection plane in TV seeker optical system reduce the intensity of the "cat's eye" reflection.
研究结果表明：回波强度受导引头光路中光学镜头的相对孔径、摄像管靶面倾斜和离焦的影响较大；扫描激光光束的入射角等因素对回波强度也有一定的影响。
Research results show that the relative aperture of optical lens, the incline and defocusing of reflection plane in TV seeker optical system reduce the intensity of the "cat's eye" reflection.
应用推荐