Buy from Ebay: Lyx Lens
4.35mm Red NDVI 660nm and 850nm NDVI Lens 10MP for Mapping (Flat) with Red NDVI filter is great for mapping.Can be easily installed into the camera drone. Most popular in AG application and mapping testing.
Designed for 1/2.3″ GoPro sensor
IR-Cut Filter: NDVI-7 filter