A screw-in circular polarizing filer. A camera captures light — a camera filter prevents a certain type of light from entering the image or otherwise alters the light that comes in through the lens.
By filtering out different colors of light i. Camera filters come in types based on the type of light they filter out, but they also come in two different formats within those categories. Circular filters screw into the threads at the end of the lens, while plate filters are held in place over the lens by a large holder that fits over the lens. Circular filters are often cheaper and they also take up less space in your camera bag. Square plate filters tend to me more expensive, but they can also be layered without creating a vignette in the photo.
Circular polarizing filters, as the name suggests, are always the screw-in type. Graduated filters that apply the effect to only a portion of the image are more popular in the plate version because you can adjust the position of the filter inside the plate to apply the effect to only the portion you want. Square plate filters often have multiple adapters to adjust the holder to fit on multiple lenses. Circular filters are fit to that lens — but you can buy the filter for the largest lens that you have, then buy a step up ring that adapts the filter to your other lenses.2d12907afe3d7433c9b7ac51c4520ab80a551ef4.serversuit.com
A Guide to Filters for Lenses
Step up rings allow a single filter to be used with every lens in your bag. Besides the shape and size, filters are categorized by the type of light that they filter out, or the effect that they have on the photograph. The most popular filters for digital photographers are circular polarizing filters, neutral density filters, graduated neutral density filters and some special effect filters.
Of all the camera filers I own, the circular polarizer is my favorite and cannot be imitated in Photoshop. Polarizing filters control reflected light. I first picked one up so that I could enhance reflections on glass and water. By twisting the front of the filter, you can control the reflections, whether you want to enhance them or eliminate them. But polarizing filters have one even bigger use — enhancing the sky.
Beginner's Guide to Buying Filters
If you remember from science class, the sky appears blue because of reflected light essentially, anyways. Since this filter controls reflected light photographers can actually use it to control the color of the sky. Along with enhancing the sky, polarizers tend to do well at adding contrast to green landscapes. Reflections are all about angles — and adjusting the angle of your camera while using a polarizing filter will also play a role in just how intense the effect is. If the sun is behind you, the effect will be much smaller. Circular polarizing filters literally give photographers the ability to control the sky cue evil laugh from your favorite power-addicted super villain — but they are some precautions to using them.
Think of neutral density filters as a nice pair of shades for your camera. By blocking some of the light, they allow photographers to use slower shutter speeds or wider apertures than the conditions would normally allow. Often, neutral density filters are used to shoot long exposures during the day. These filters come in different densities to block out a little light or a lot of light. Which one you need depends largely on the shooting conditions.
Both are considered moderate filters for small changes — like using a wide aperture or a shutter speed slow enough to blur a river or waterfall in daylight.
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For creating more extreme blur in the middle of the day, stronger filters like a 3. Neutral density filters are also often sold in sets, so photographers can pull out the intensity they need for the shooting conditions. Neutral density filters can be circular or square plate filters. The plate filter type is often preferred for NDs because it makes it possible to stack multiple filters and intensify the effect for extreme long exposures. Graduated Neutral Density GND or grads are neutral density filters, but they only cover a portion of the image.
Most commonly, grads are used to prevent overexposing the sky, leaving details like the clouds and color intact even on a bright day. Along with coming in different densities just like regular NDs, grads have two more types: The hard grad has a more abrupt transition from light to dark, while the soft has, you guessed it, a softer transition. The circular grads transition from light to dark in the center, which means you have to put the horizon in the center to darken the sky. Grads are very powerful tools for landscape photography.
Beginner’s Guide to Buying Filters
Round, screw-in filters are ideal if you only want to use the filter on one lens, or lenses with the same size thread, but if you have lenses with different thread sizes you'll need different filters for each one. With the square filter system you only need to buy one set of filters, as the filter holder that they sit in can have different adaptor rings fitted to accommodate for the different size of lens.
Which type you should choose also depends on the type of filters that you want to use, as some filters are only really useable screwed directly to the lens or in a square filter system.
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Skylight filters, for example, are best suited to the round screw-in design, but filters such as neutral density grads are easiest to use in a square filter system. A skylight or ultraviolet filter is mainly used to protect the front of your lens from potential damage, and prevent you getting dirt, dust or water on the harder to replace front element of the lens. All you need to do is keep the filter attached to your lens whenever you are using the camera.
This is particularly important when shooting in wet, muddy or dusty conditions. UV and skylight filters also filter out some ultraviolet light, which has the effect of reducing haze. Unlike a UV filter, a skylight filter has a very subtle pink cast to it.
What are camera filters?
This was originally designed to reduce the slightly blue cast of color film, but with digital cameras this isn't really an issue. Even though this filter will prevent the worst of the dust, dirt and water reaching the front of the lens, you may still need to clean the filter to prevent this dirt affecting your images.
For dust and dirt it's best to use a brush or air blower to remove this without damaging the filter. If you try to wipe the filter clean there's a risk that you'll scratch the surface. Wiping the filter to remove water drops needs to be done extremely carefully, as it's likely that there will also be some dirt or dust that can become embedded in the cloth or tissue, and scratch the filter.