TIANYA Gradual Gray Filter for Cokin P Series

Specifications:

• 100% brand new & high quality filters for Cokin P series
• Gradual Gray Filter is a MUST HAVE for digital users, because the digital sensor unlike film has very low exposure tolerance
• Detail will be lost on both low and high light area. To correct this, you need gradual filter to balance it
• Use it with the right adapter and filter holder, it is compatible with all the DSLR, DC, DV lens
• Cokin Gradual Gray Filter is ideal for digital users to balance it when detail is lost on both low and high light area
• Camera lens filter is compatible with Cokin P series
• Color: Gray 
• Size of the Color Filters: 8.3 x 9.9 x 0.2cm/3.3 x 3.9 x 0.1in (L x W x H)

Details:

• High quality filters for Cokin P series, it features bright color, genuine transparency and long application life

• Cokin P Gradual Gray Filter is ideal for digital users to balance it when detail is lost on both low and high light area

What's the Camera Lens Filters:

• Camera lens filters still have many uses in digital photography, and should be an important part of any photographer's camera bag. These can include polarizing filters to reduce glare and improve saturation, or simple UV/haze filters to provide extra protection for the front of your lens

Lens Filter Type:

• The most commonly used filters for digital photography include polarizing (linear/circular), UV/haze, neutral density, graduated neutral density and warming/cooling or color filters
• Example uses for each are listed below:

Problems with Lens Filters:

• Filters should only be used when necessary because they can also adversely affect the image. Since they effectively introduce an additional piece of glass between your camera's sensor and the subject, they have the potential to reduce image quality. This usually comes in the form of either a slight color tint, a reduction in local or overall image contrast, or ghosting and increased lens flare caused by light inadvertently reflecting off the inside of the filter
• Filters may also introduce physical vignetting (light fall-off or blackening at the edges of the image) if their opaque edge gets in the way of light entering the lens (right example). This was created by stacking a polarizing filter on top of a UV filter while also using a wide angle lens-causing the edges of the outermost filter to get in the way of the image. Stacking filters therefore has the potential to make all of the above problems much worse

Note on Choosing a Filter Size for a Camera Lens:

• Lens filters generally come in two varieties: screw-on and front filters. Front filters are more flexible because they can be used on virtually any lens diameter, however these may also be more cumbersome to use since they may need to be held in front of the lens. On the other hand, filter holder kits are available that can improve this process. Screw-on filters can provide an air-tight seal when needed for protection, and cannot accidentally move relative to the lens during composure. The main disadvantage is that a given screw-on filter will only work with a specific lens size
• The size of a screw-on filter is expressed in terms of its diameter, which corresponds to the diameter usually listed on the top or front of your camera lens. This diameter is listed in millimeters and usually ranges from about 46 to 82 mm for digital SLR cameras. Step-up or step-down adapters can enable a given filter size to be used on a lens with a smaller or larger diameter, respectively. However, step-down filter adapters may introduce substantial vignetting (since the filter may block light at the edges of the lens), whereas step-up adapters mean that your filter is much larger (and potentially more cumbersome) than is required
• The height of the filter edges may also be important. Ultra-thin and other special filters are designed so that they can be used on wide angle lenses without vignetting. On the other hand, these may also be much more expensive and often do not have threads on the outside to accept another filter (or sometimes even the lens cap)

Package Included:

• 1 x TIANYA Gradual Gray Colour Filter for Cokin P Series
• 1 x Plastic Box