Friday, April 26, 2013

Understanding The Polarizing Filter

By Luke Walker


A polarizing filter is a brilliantly diverse and useful tool that you can place in front of your lens. It gets rid of reflections, colour and glare from your subjects.

Imagine you have a nice colourful shot that you're thinking of taking. It may be of some cars or bicycles for example. Let's take a look at how you would use a polarizing filter in this situation.

A lot of people don't fully understand exactly when they should be using polarizers. If the sun is behind you. In this situation the polarizer won't have any effect at all. Also, if you're shooting into the sun, the polarizer will have no effect at all. The sunlight has to be coming from the side, ideally at a right angle to your subject.

With a polarizer you twist it to see the effect. You can see it start to roll around the picture, darkening the sky behind it. It will make a blue sky seem a deeper tone as well as removing the reflections off the objects you are shooting, giving you a beautiful, strong, saturated colour. This makes a truly amazing shot.

It is worth mentioning that the stronger the sun is, the stronger the effect will be, and it could also appear to be a little bit too strong, so it is recommended that you take your time and find the right amount of polarization as you twist the filter.

Another important point is that if you're shooting at high altitudes such as on a skiing vacation or a mountain climbing trip, you will get too much of an effect. In fact, you'll probably find that it could even make your skies go black most of the time. From time to time you may want to dial the polarizer back a little bit or don't use one at all.

Another instance is if there is very little light, say for example you are photographing a garden and it's bucketing it down with rain. The rain has covered all of the plants with a nice glistening water. Let's say you want to get rid of those reflections so that all you are seeing is the intense, saturated colour. This is the perfect situation to use a polarizer.

Another important thing to let you know about a polarizing filter is that it is pretty dark, and removes two or more stops of light. So it is best to use it with a tripod.

Also, don't assume that using one will make all of your pictures look beautifully colourful and vibrant. It may not actually produce that kind of an effect. Instead, it may produce fuzzy pictures as it is cutting away light, so your shutter speed will be slower. In conclusion, polarizing filters are very versatile and useful, and can be used in all kinds of photography. They can make a big difference when used properly.




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