Sep 28th, 2010, 09:50
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只看该作者 #64 |
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Senior Gear
   
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UV filter 是否有用
引用的, 不知道对还是错 -> Based on my experience, and on what seems to be the view of professional photographers (see luminous-landscape.com), a UV filter will not help improve the image quality on modern day lenses, because they are already anti-UV coated. They are only useful as a relatively cheap means of protecting your lens' front element, even though the necessity of protecting the durable modern coatings on lenses is questioned as well (in the source named above). Clarification... This is NOT the "haze" they cut down on. In the old days of film, UV light would cause a haze on the film itself. Or, UV light would bounce off particles in the air and get recorded by the film. This had absolutely nothing to do with the actual haze in the scene. Also, the film recorded too much blue at high altitudes so a Skylight 1A or 1B was used to cut UV and some blue. These days, film and digital sensors assemblies are not sensitive to UV light and do not create the haze as in the old days. If there is haze in the scene, there will be haze in the image. No filter can remove that. The only thing a UV filter does is to "protect" the front element of the lens in bad conditions. There is no effect on the image itself. Statistically speaking, unless you're doing something specific where your lens needs protection, UV filters are a bad investment in my opinion. The odds of seriously damaging your lens in a way that a filter would have prevented are extremely low. It's never happened to me in 9+ years of regular shooting. I would agree with the last post. Use a good quality lens hood all the time, and you will be protecting the front lens element against things contacting it, etc., as well as protecting against flare caused by strong light sources outside the subject area. The only reason I would even consider using a filter for protection is if I needed to use the camera in an environment with something like blowing sand. If you must use a filter, make sure it's the best quality multicoated filter you can find so that you don't degrade the image quality. |
Never argue with an idiot. He will consistently drag you down to his level and beat you with experience.
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Sep 29th, 2010, 10:07
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只看该作者 #74 | |
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流狼.土狼屯
注册日期: Jun 2005
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引用:
如果有一种比较严肃的拍风景的欲望, 可以去玩渐变镜 |
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Sep 29th, 2010, 10:52
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只看该作者 #75 |
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Senior Gear
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CPL 确实有用, 其实也不用怎么调. 大体上调好了, 就抬手拍, 基本上只要是同一个方向, 不用重新调. UV filter 我想还是算了, 云层刺眼我就用 CPL, 否则就不放任何 UV filter. 我买了这个: B+W 72mm UV 010 MRC filter, 没开封的. 加拿大卖 $120+tax = $135, 我卖 $100, 谁要? 没人要我就退回给 Amazon. 
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