GWMS15 - GreenWater Magic for Sigma wide angle lenses
The GWMS15 is a GreenWater Magic filter designed to fit into the filter holding slot on the rear on the Sigma 15mm Fisheye lens, as well as several other Sigma wide angle lenses - such as the 8mm FE, 12-24mm & 15-30mm. This filter will fit on all these Sigma lenses irrespective of the brand of camera they are designed to fit. The filter measures approximately 23x25mm. Note that green waters are usually darker than blue tropical waters and filter photography in these conditions often involves long exposures.
(Note colour of filter, above, is not necassarily accurate. Also note that the fitting of the filter is shown for a Nikon lens.)
As this filter is made from the GreenWater Magic formula the photographer must set the white balance manually (using preset or custom or manual white balance) every time they change depth by a few metres during the dive. This is easy to do and takes just a few seconds on most modern DSLRs. This filter is designed specifically to work with the white balance of a modern digital camera in blue to blue-green waters.
A single GWMS15 costs £22 and a pack of three filters costs £35.
Magic filters are designed for available light underwater photography. The GreenWater Magic works from 4m down to at least 22m (70ft). This filter does tend to render green waters more blueish. All our filters are optical quality polyester gels, manufactured for us, to our recipes, by one of the world's leading filter companies. All Magic filters are supplied with detailed instructions.
Sample photo with the GreenWater Magic Filter: