Polarising Filters: Why You Should Have One (And Know How To Use It)

The Role of Filters in Photography

Nature photographers often face a dilemma regarding the use of filters. While some swear by them, others prefer to avoid them altogether. Personally, I find myself in the middle ground. I strive to capture subjects in natural light without artificial effects, but sometimes conditions necessitate a little assistance. That's why I always carry a polarising filter in my camera bag.

What is a Polarising Filter?

A polarising filter functions similarly to polarised sunglasses. It doesn't add color to your photos but reduces glare and reflections, making natural colors appear more vibrant. This effect is particularly noticeable in the sky, where a hazy blue can transform into a rich, saturated hue.

How It Works

Unlike colored filters that add artificial hues, a polarising filter enhances the natural color of the sky. For instance, a blue filter would tint white clouds blue, whereas a polariser keeps them clear and white. Additionally, it increases the contrast between the sky and clouds, making cloud formations stand out more prominently.

Adjustable Polarisation

Polarising filters can be rotated on the lens to adjust the level of polarisation. It's crucial to practice with your polariser to achieve the most natural effects. Inexperienced photographers might overdo it, resulting in overly saturated colors and extreme contrasts that look unnatural.

Practical Applications

Sky and Landscape Photography

The most common use of a polarising filter is in landscape photography. By reducing glare and enhancing color saturation, it can make skies look more dramatic and landscapes more vibrant.

Rainforest and Vegetation

Surprisingly, polarising filters are also beneficial in rainforests. On cloudy days, the glossy leaves of rainforest vegetation can reflect a lot of light. A polarising filter can reduce this glare, resulting in more saturated greens.

Water and Shiny Surfaces

Eliminating reflections can significantly improve photos of water bodies and shiny surfaces like glass buildings. With practice, you'll discover numerous ways to use your polarising filter effectively.

Drawbacks to Consider

Exposure and Shutter Speed

One downside is that polarising filters darken your exposures, often requiring slower shutter speeds. This means you'll need to keep your tripod handy.

Time of Day and Angle to the Sun

The effectiveness of a polarising filter varies with the time of day and your angle to the sun. Sometimes, you'll be better off removing the filter and shooting without it.

Interesting Stats

• Market Growth: The global camera lens market, which includes filters, is expected to grow from $4.2 billion in 2020 to $5.6 billion by 2025, at a CAGR of 5.9% (Source).
• Usage: According to a survey by Digital Photography Review, 35% of photographers use polarising filters regularly (Source).

Conclusion

Adding a polarising filter to your DSLR kit can significantly enhance your photography. While you won't use it all the time, with experience, you'll learn to judge when it's beneficial. Your photos will be richer and more vibrant, making the polarising filter a valuable tool in your photography arsenal.

By understanding the nuances of polarising filters and practicing their use, you can elevate your photography to new heights. Whether you're capturing dramatic skies, lush rainforests, or reflective surfaces, a polarising filter can make a world of difference.