Good question.
The graduated neutral density filter helps lower the dynamic range of the scene, so that it is within the recording capabilities of the sensor, by reducing the light coming from the bright sky above the horizon, while still retaining detail in the landscape below, such as when it is necessary to shoot into the direction of the sun. The polarizing filter does the same thing as polarized sunglasses, reducing glare and reflections, darkening blue skies, and helping saturate colors. Landscape photographers always have graduated ND filters and polarizing filters in their arsenal, and so should aerial videographers and photographers. If shooting stills, you can bracket the exposure and shoot in RAW to create a High Dynamic Range (HDR) composite during post, but video gives you no such option. Also, the +/- 0.7 EV brackets of the DJI GO app, with a limited 5 bracket range from -1.4 to +1.4 EV, are usually too narrow for a full HDR coverage of a landscape scene. A graduated ND filter can help expand that range.
Nice explanation
Thanks!Nice explanation
What I meant is that I don't think there is as much demand for GND and PL filters.
All true, but I've seen many a post from people that think the ND filters are for correcting overexposure, when, in fact, their purpose is only to lower the shutter speed to twice the frame rate. Myself, I don't mind a little choppiness in the 4K video because I usually fly at sunset, and I want the shutter speed as fast as possible to extract sharp still frames out of the 4K video. It's fairly close to 1/50th anyway, after sunset.
If you want the graduated ND filter I think your only option is rainbowers filters, I have them and they work great
Thanks! I'm just surprised DJI hasn't recognized the need, especially for the circular polarizer.
