Polarisers – a guide to using polarising filters
You will find few more important points that a photographer can perform to improve his or her photography than getting familiar with the use of the polarizing filter.
So what can a polarizing filter do for you ? Among other things it may darken the sky, remove reflections from waters, and create foliage appear less shiny. Colour vividness can also be significantly enhanced. It is the just filter for colour film that can do all this.
There are two types of polariser Filters : linear and also circular. Linear polarisers Filters are generally cheaper, but DSLR users need a circular polariser as it’s designed to keep your camera doesn’t give an incorrect exposure reading Autofocus cameras polarise a few of the light that has passed through the lens once it’s inside the camera, an excellent it has recently been polarised by a filter, underexposure often occurs.
Circular polarisers are built using a special foil, called a 1/4-wave retardation plate’, which causes light waves getting through to rotate so they appear to be unpolarised to the camera’s metering system, preventing exposure error.
There are numerous polarisers Filters available on the market now and costs vary enormously. Many photographers get a screw-in version and attach it directly to their lens. The downside is the fact that, if you have lenses with different filter thread sizes, you will need to buy more than one polariser, which gets expensive, or use stepping rings. Additionally, if you are using other filters in a filter holder regularly, such as ND grads, you will need to attach the holder to the polariser, making it fiddly to use as the holder can get in the way of the polariser.
Probably the most versatile solution is to buy a polariser which you can use with your filter holder. Cokin polarisers easily fit in the rear slot of the Cokin filter holder and is rotated independently of the holder itself, which is handy when using ND grads.
If you are a Hitech or Lee Filters user, you are able to screw a polariser to the front of the holder (for Lee Filters, you need to buy a 105mm threaded ring as an optional extra) and also again rotate it to find the effect you want, without rotating the filter holder. For your Lee and Hitech 100mm systems, this method is expensive simply because you need a 105mm polarise, and they’re not cheap. If you use a Hitech 85 system, then you will need a 95mm polarise – still not cheap. Here are a few recommended polarisers.
For slot-in systems
Cokin P164 Circular Polariser (for Cokin P system holder)
Cokin Z164 Circular Polariser (for Cokin Z-Pro System)
Lee Filters 105mm Circular Polariser
Heliopan Circular Polarisers Slim Mount
Circular Polariser Slim Mount
Sigma 77mm EX DG Circular Polariser
B+W 77mm Slim Circular Polariser
Hoya 77mm Pro-1 Digital Circular Polariser
Hoya 77mm Slim Circular Polariser
Tiffen 77mm Circular Polariser
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