The LEE Filters SW150 Hard Edge Graduated 81A Filter from is compatible with a LEE Filters SW150-series filter holder. This filter can be applied to create a warm cast over specific areas of an image, such as a hazy or colorless sky, while allowing for a normal, unaffected exposure in the other regions of the image. This effect can be obtained under daylight when this filter is used on a film camera system with daylight film installed, or on a digital camera system with its daylight white balance setting selected. This filter's partial coloration corresponds to an ability to partially reduce 3400K color temperatures to 3200K, which reflects a mired shift value of up to +18 that can be applied to other starting color temperatures as well. This feature is most pronounced at the edge and tapers to clear by the middle, with a hard-edged line of transition between the colored and clear areas.
|Type||Lee-Filters -SW150 Systems|
|Filter Size||150 x 150mm|
|Type||Graduated light balancing|
|Size||150.0 x 170.0 mm|
|Filter Factor||1.25x (0.3 stop)|
|Effect||Adds warmth to specific areas of an image when used under daylight on a film camera system with daylight film installed, or on a digital camera system with its daylight white balance setting selected|