Take off that awful thing of your lens

Started Jul 7, 2012 | Discussions thread
ProfHankD
Senior MemberPosts: 1,809Gear list
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Re: Filter "quality" is not the major issue
In reply to wkramer, Aug 9, 2012

wkramer wrote:

Why are people using UV filters? I always put a quality Multi-Coated NC filter on all of my lens'. No degradation and protects the front element (from the elements) as well.

An ordinary piece of optical glass blocks most UV, so you can call it a UV filter, NC filter, optically clear lenscap, etc. Other filters, such as the once-popular skylight (1A), are different from these, having slight tints (which are often difficult to see in JPEGs shot with AWB).

There always is degradation, although it is negligible in many circumstances. No matter how well made and coated, the extra flat surfaces cause reflections and slight loss of light. Further, the different-from-air refractive index also introduces slight separation of different wavelengths (CA). Physics: it's not just a good idea -- it's the law.

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