Replacement 2.5mm 90 degree FPV camera lens without filter, compatible with yi Camera Key benefits Restores or changes the field of view to a 90 degree FPV perspective using a 2.5mm focal length, giving a wider, more immersive image than standard telephoto settings. Intended as a direct replacement lens for compatible yi Camera models, useful when the original lens is scratched, damaged, or not suitable for FPV use. Sold without a filter, so it can be used in setups that require custom filtering or no filter at all. What it does and why it matters Function: Provides a stable wideangle view optimized for first person view recording and flying applications. Compatibility: Designed to match the optical requirements of yi Camera models that accept userreplaceable lenses. Size and specification: 2.5mm focal length with a 90 degree field of view, suitable for capturing more of the scene in tight or fastmoving environments. Filter status: Supplied without a filter, which offers flexibility for users who apply their own IR cut, ND, or other optical filters externally. Practical performance Delivers a consistent wideangle perspective appropriate for FPV recording and monitoring tasks. Works well in applications where a moderate wide view is required rather than an ultrawide or fisheye look. Typical use scenarios FPV drone flights: Swap in this 2.5mm lens to achieve a 90 degree view for more natural pilot perspective and improved situational awareness. Action and sports capture: a damaged lens on a yi Camera used for biking, skating, or other activities to restore wideangle framing. and maintenance: Keep a spare lens for quick field replacement when the original lens is scratched or cloudy. Notes This product is a lens only and does not include any filters. Confirm compatibility with your specific yi Camera model before to ensure proper fit and alignment.