Neutral Density 4 (ND4)

Neutral Density Filters reduce the amount of light entering the camera, enabling a longer exposure time than otherwise possible. On the GoPro camera this means reducing image "jello" and "jitter" since it decreases the GoPro shutter speed. If you are shooting in ultra bright lighting, using an ND filter will help bring the light levels back to prevent highlights from blowing out. ND filters can also help emphasize motion, or make an otherwise tumultuous scene appear surreal and quiescent. They will also enables larger apertures which can produce a shallower depth of field, or achieve a sharper photo.

30mm Glass Threaded Version:
This threaded filter requires our 30mm Filter Adapter Ring - Lens Surround which pushes over the standard black plastic lens surround on the GoPro Hero cameras.

Specifications:
Weight: 5.83g
Mount: M30 x 0.75mm
Mount Material: Metal
Optics Material: Glass
Scratch-Dig (MIL-PRF-13830B): <40-20
Exposure Factor: 4x
Optical Density: 0.6
F-Stop Reduction: 2


Supermount Version:
This small filter is inserted into the sensor side of the Supermount during internal GoPro Supermount installation. Simply push the filter in with a clean cloth or non-marring tool making sure both sides are free of dust and smudges.


Specifications:
Weight: 0.27g
Diameter: 12.53mm
Thickness: 1.0mm
Optics Material: Glass
Scratch-Dig (MIL-PRF-13830B): <40-20
Exposure Factor: 4x
Optical Density: 0.6
F-Stop Reduction: 2


m12 Version:
This small filter is inserted into the sensor side of a m12 lens mount. You will need to unscrew the lens mount from the sensor to install if you have a lens already installed. If you don't have a lens, simply drop it down the m12 lens mount barrel. Make sure to use a clean cloth and clean the filter before insertion, making sure both sides are free of dust and smudges.


Specifications:
Diameter: 11.35mm
Thickness: 1.0mm
Weight: 0.27g
Optics Material: Glass
Scratch-Dig (MIL-PRF-13830B): <40-20
Exposure Factor: 4x
Optical Density: 0.6
F-Stop Reduction: 2




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