Effect Filter

Posted on Tuesday, June 3, 2008 in Uncategorized

Should I have a glass polarizing filter for my camera?

I have a Canon Rebel XTi with the standard 18-55mm, which came in the kit. The type photo shop tried to sell a polarizing filter Tiffen, not buying. Now, I'll take it. Is it necessary and if so, what are the benefits? What are the negative things that may come from its use? Power is left on at all times for all shooting conditions? Right now I have a hood, but the plan to back filter. Any advice on what to do and the positive and negative of the filter may be large.

Short answer: Not required. A CPL (Circular Polarizer) allows you to filter polarized light. This effectively allows you to do several useful things: It can turn a deeper blue sky. You can take water reflections, glass and reflective surfaces. It also limits their capacity to collect the light that can be used as a makeshift ND filter if you need in a hurry. You can also change slightly the color of other things like foliage. When you use a CPL to darken the sky, the effect is greatest when shooting at 90 degrees to the sun. A word of warning: do not use CPL to darken the sky when the use of a front lens wider than your kit. This rarely gives more than a very uneven effect that the angle is too wide. In some If the PLC is a necessity, as when you need to reduce glare, but this is not an essential piece of kit unless specific requirements listed above. I definitely would not recommend leaving the lens at all times. All filters cause a glare and ghosting, which can degrade images even appear as lights brilliant in his shot, especially when you have a strong light source in the plane. If you want something for nothing left in the goal of protection, you can buy a good as UV multilayer filter. Hoya are good. However, the filters, even very expensive, can cause glare, etc. One thing you should know if you decide to get a CPL is not going to disappear altogether strong reflections of Flash. Flash is not pure polarized light is unaffected until it has been polarized. If you ever should do such things when a second polarizer can be fitted in the flash at 90 degrees to which the objective of providing an image with the reflections of inflammation is a very bright little, even when shooting things as water. Of all these uses of a CPL reduces reflections of which only can be done in post-processing. For this reason, the PLC (with ND filter) are among the few filters that are still relevant in the digital age. Goodluck! EDIT: The answer is partly wrong Holly9. All filters, filters at very cheap and above all in the sun and can affect image quality. So even if you keep a UV filter on your lens, it is desirable to remove the photos in places where bright light sources. In addition, comments Holly9s on UV filter UV filter is also wrong. Unlike the days of film, digital sensors are built with modern filters that block most of the UV light. Thus, a UV filter does nothing, at least not to UV light.

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