Caddx offers an ND 8 and an ND 16 filter for the Caddx Turtle V2, Caddx Ratel and basically every other Caddx camera that comes with the turbo eye lens. You can either get them separately or in a kit, one of each strength. But there is also a different version of the ND filters for the Caddx Turtle with the special glass lens.
Caddx also released an ND filter for their 4K FPV cam, the Tarsir. It is not clear yet which strength it is, and only one version is available, but I am sure this will soon change.
Jello or the “rolling shutter effect” occurs with, as the name suggests, cameras that have a rolling shutter. Cameras with a global shutter on the other hand, take a snapshot of an entire scene at a single instant time.
The HD cameras we use in FPV all have a rolling shutter where a scene is captured in horizontal lines, one line after the other. Especially when fast movement is involved it might happen that the quad already moved a bit and the next scanned line is thus offset from the previous one and the result is jello.
An ND filter basically reduces the amount of light entering the lens, thus decreasing the shutter speed, which on the other hand will introduce motion blur. So you basically trade motion blur against jello - a trade off I would take anytime, at least in FPV.
Albert Kim has released a flight video with the ND filter on the Turtle - pretty impressive, basically Jello free. This could be interesting for everyone with a Mobula7 HD, Tiny Leader, Beta 85x HD or any other brushless whoop with the Caddx Turtle V2 on board