The Camera First Filter
Digital cameras provide white balance function caused many outfit on camera external color filters loss of a role
. However, here are some filters are still very useful, and you should consider them go to income.
1. UV mirror
2. A polarizer
3. Gradient grey mirror
4. Neutral grey mirror
UV mirror
Now many lens have good UV coating, so put a piece of UV mirror seems to some redundant. However, these lens or need some protection to avoid scratches, dust particles, sea water, tree branches, and so on. Change a filter price change than before the lens mirror group to much cheaper. Some may say shouldn't be on the expensive lens filter using cheap, but now the quality of cheap filters have very good, and it have of protection than the loss of important quality.
Polarization mirror
Circular polarization mirror the design purpose is coping with the highlights and reflected light. They can make more blue sky, white clouds more white. Through the rotation filter outer ring, can adjust the polarization result of mirror. In order to maintain the natural visual effect, should only use half of the effect. If you use too much, the sky and the clouds will be too big contrast, make the picture looks fake. In filming, you can turn and polarization lens, find the best position.
A polarizer is very helpful when the water in the shooting, it can eliminate the surface glance, make the picture straight permeable. A polarizer is most suitable for use in sunny day, when the sun with a 90 degree Angle when the best effect. No matter how to say the camera shop salesman, unless there is the nonmetal glance, otherwise in the cloudy weather a polarizer is useless.
In addition to pay attention to some of the things that use a polarizer increases 0.75-2 levels of light loss. And in order to avoid camera metering table error, be sure to use circular polarization mirror, not with a polarizer. And in Photoshop is not "do" a round the effect of partial mirror. Post treatment can simulate some effect, but can't eliminate reflected highlights. A lot of professional photographers thought a polarizer is one of necessary accessories.
Gradient grey mirror
Half of the mirror gradient ash is transparent, the other half is in ash filter. Through the mirror in the sky of ash covered, can balance the dark parts with high exposure. Gradient grey mirror is usually square, need through the other filter frame installed in front of the lens.
Gradient grey mirror have different density or "level", and is the continuous gradient. This ensures that the filter effects will not be obvious in the picture. Gradient grey mirror is especially suitable for the scenery photography, especially the prospect and the sky brightness difference.
Neutral grey mirror
Neutral grey lens and gradient grey mirror similar, but the whole piece of lenses are gray. They will not lead to partial color or other effects, but will reduce exposure. If taken in sunny day running water, because the environment too bright and to reduce the shutter speed clap a flow of water. Use neutral grey mirror can reduce the shutter speed to achieve this objective. Neutral grey mirror usually have 2 or 3 class type.
Other precautions
1. Most of the filter effects can be simulated in Photoshop, but this is some advanced skills and takes time. For a simple change color temperature for the filter, the use of the "photo filter" layer can be achieved. In order to simulate the effect of gradient grey mirror, when shooting in earlier stage must be taken at different exposure 2 times, then in Photoshop of synthesis. Remember that extreme adjustment will lower quality.
2. Buy filter, should pay attention to the front of the mouth lens mark filter size, usually in mm said.
3. An old saying goes "a minute price a points goods", when buying a filter is also so. Expensive filter has better quality. Buy filter, looking for a coating or coating of super filter. With circular filter for, Tiffin and Hoya filter is relatively cheap, B + W and Heliopan quality is better, but also more expensive. For square filter for, Singh-Ray, Hi-Tech, Lee has good products. Of course they all need special filters frame, so also want to pay attention to filter the size of the frame.
by: baby
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