Can someone please tell me a good nd filter for the 18mm and 75mm lenses?

I recommend Firecrest Ultra ND. They make the 55mm thread size you need. Unfortunately DJI's 18mm lens hood will not work with most aftermarket ND filters, including this one, but I make a lens hood that will work. PM me if you're interested.

55mm URTH set of 5. But any good 55mm. I would also get a variable one.

ScooterC5 Posted at 11-29 21:48
I recommend Firecrest Ultra ND. They make the 55mm thread size you need. Unfortunately DJI's 18mm lens hood will not work with most aftermarket ND filters, including this one, but I make a lens hood that will work. PM me if you're interested.

I noticed the same about the hood not going back on with variable. On the 18mm the hood keeps the sun/direct lighting flares down a bit. I use a Neweer variable ND 2-1000 with no hood. With the URTH ND filters (4-1000) I can get the hood back on.

fletcher-use Posted at 2024-12-25 18:18
I noticed the same about the hood not going back on with variable. On the 18mm the hood keeps the sun/direct lighting flares down a bit. I use a Neweer variable ND 2-1000 with no hood. With the URTH ND filters (4-1000) I can get the hood back on.

I designed a lens hood to work with most third party NDs for the DJI 18mm. I haven't tested with the VND, but the it increases the flange distance a bit. I use it with the Firecrest NDs and Hoyas. It's available here:
https://shop.pikespeakaerial.com/