These filters are an essential accessory for achieving maximum image quality. The kit comes with 6 different densities (ND4, ND8, ND16, ND32, ND64 and ND1000), giving you options for virtually any light condition. The carrying case is excellent: each filter has a perfectly adjusted hole, with foam that keeps them safe and protected. It closes well and the filters don't move or touch each other, so there's no risk of scratches. It's compact and fits easily in the drone backpack. The optical quality is very good. The glass is clear and crisp, with no rare color dominants. The filters are easily mounted and disassembled on the Mini 5 Pro's camera, fit perfectly without gaps and do not affect the gimbal. They are very light, you don't notice any difference in the drone's flight. I have especially tried the intermediate filters (ND8, ND16, ND32) and the results are excellent. They eliminate annoying glare on reflective surfaces such as river water, sea water, lakes... when you record with the sun on the side or in front. The video looks much more professional, with smooth movements and without that “jump” effect that unfiltered recordings give. The image saturation increases considerably. They also reduce overexposure of the sky on very bright days, maintaining detail in the clouds. The ND1000 is perfect for special effects with long exposures or days of very intense sun. The quality-price ratio is great. Because it has 6 good quality filters with a case included, the price is very good. Much cheaper than buying them separately and with similar quality to more expensive brands. Highly recommended if you have a DJI Mini 5 Pro and want to take your videos to the next level. The investment is worth it. For those who appreciate the technical data: • ND4:2 stops reduction (25% transmission, factor 0.25) • ND8:3 stops reduction (transmission 12.5%, factor 0.125) • ND16:4 stops reduction (transmission 6.25%, factor 0.0625) • ND32:5 stops reduction (transmission 3.125%, factor 0.03125) • ND64:6 stops reduction (transmission 1.56%, factor 0.0156) • ND1000:10 stops reduction (transmission 0.1%, factor 0.001) Optical construction - Multilayer system: Base substrate - HD optical glass: • Material: Low iron content (ultra-clear glass) • Refractive index: ~1.52 (BK7 standard or equivalent) • Visible spectrum transmission: > 99% without coatings (380-700nm) • Optical homogeneity: xl/4 PV (Peak-to-Valley) or higher • Thickness: Estimated 0.5-0.8mm (stiffness/weight balance) • Flatness: <0.5mm deviation on active surface Mounting system - DJI Mini 5 Pro specific frame: Frame material: • Engineered polymer: PC (polycarbonate) or POM (polyoxymethylene/Delrin) • Advantages: o Weight ultralight: <2g per filter (critical for sub-250g drones) or Higher impact resistance to metals in similar thicknesses or Thermal expansion coefficient compatible with the drone body or Non-conductive (elimination of short circuit risk) Critical weight considerations: • DJI Mini 5 Pro base weight: 249g (low critical 250g regulatory limit) • Full filter weight: ~2-3g • Safe margin: Keeps drone under 250g even with filter mounted • Regulatory implication: Preserves C0 (EU)/sub-250g (FAA) classification without registration in many jurisdictions Physics of ND filters - Technical Foundations: Problem without ND filter in bright conditions: • Camera forces fast shutter (1/500s, 1/1000s) to avoid overexposure • Result: “stuttery” or “stroboscopic” motion, loss of natural motion blur • Video looking like an “amateur camcorder” vs. “cinematic” ND filter solution: • Reduces incoming light → allows slow shutter (180° adjustment) → correct motion blur • Professional “cinema” quality video Practical user guide (for DJI Mini 5 Pro - fixed aperture f/1.7, ISO base 100): ND4 (2 stops): • Conditions: Light cloudy, sunrise/sunset, open shade • Approximate EV: 13-14 • Use: Days with moderate light, transitions between shade and light ND8 (3 stops): • Conditions: Normal daylight, partially covered sun • approximate EV: 14-14 15 • Use: Most versatile of the kit, covering 60-70% of typical daytime situations • Ideal for: Early morning hours and late afternoon ND16 (4 stops): • Conditions: Bright sunlight, noon on clear days • Approximate EV: 15-16 • Use: Standard for general daytime flight, especially 10am-4pm • Perfect for: Landscapes with clear skies ND32 (5 stops): • Conditions: Intense sun, highly reflective surfaces • Approximate EV: 16-17 • Use: Optimal for scenes with water, snow, sand • Reduces reflections specular images reported by users in ND64 rivers/sea (6 stops): • Conditions: Extreme zenith sun, latitudes close to the equator, summer • Approximate EV: 17-18 • Use: Midday in conditions of maximum brightness • Prevents: Blow-out of highlights in sky and clouds ND1000 (10 stops): • Conditions: Special effects, very long exposures • Approximate EV: Reduce EV18 to EV8 • Use: o Long exposure on video (silky effect in water, clouds with extreme motion blur) or Hyperlapses with exposures of several seconds or Extreme light conditions (glaciers, white deserts) • Limitation: Too dense for general use, very dark image under normal conditions Quick Reference Table (24fps, 1/50s, ISO 100): Condition | EV | Recommended filter -------------------|-----|------------------- Dense cloud | 11 | No filter Light cloud | 13 | ND4 Partly sunny | 14 | ND8 Normal sun | 15 | ND16 Bright sun | 16 | ND32 Bright sun | 17 | ND64 Extremely bright | 18+ | ND1000 (effects) Observable technical benefits - Analysis of reported use cases: 1. Elimination of specular reflections in water: Physical phenomenon: • Water surfaces act as imperfect mirrors (reflectance ~ 2-10% depending on the Fresnel angle) • Sun at a low angle → larger component of specularly reflected polarized light • CMOS sensors saturate in reflection regions → loss of detail (clipping) Correction mechanism with ND: • Reduction of overall luminous intensity → avoids sensor saturation • Allows to maintain a slow shutter for motion blur in movement of water • User reports:” They eliminate glare very well, especially in river and sea water when the sun is tilted” Technical validation: It matches the expected physics perfectly. ND32/ND64 filters are optimal for solar angles 15-45° above the horizon on aquatic surfaces. Note: ND filters DO NOT polarize (different from CPL filters). They reduce light uniformly but not selectively polarized glare. For maximum reflection reduction, combine with hybrid ND/PL filter (not included in kit). ND filter cleaning: 1. Air blower: Eliminate loose dust (never blow with your mouth - moisture and saliva) 2. Camel hair brush: Gentle sweep for attached particles 3. Microfiber cloth + optical cleaning liquid: o Circular movement from the center to the outside or NEVER rub hard (risk of scratching the coating) 4. Inspection with light: Check for the absence of debris, fingerprints, fungi Storage: • Always in a case when not mounted • Dry environment (< 50% RH) to prevent fungus on coatings • Moderate temperature (avoid extreme heat in the vehicle) • Separation of other elements that may scratch Pre-flight inspection: • Check for cleanliness of both surfaces (front and rear) • Confirm safe assembly (no gap that causes vibration) • Post-assembly gimbal test (automatic calibration must be completed error-free) Especially recommended for: • DJI Mini 5 Pro owners looking for professional film quality • Content creators who prioritize correct motion blur and controlled exposure • Landscape videographers, especially with water, snow or reflective surfaces • Users who travel between multiple light conditions on a single flight Not recommended for: • Exclusively night or indoor flights (counterproductive ND filters in low light) • Static aerial photography (priority is high shutter speed to freeze motion) • Users who only record automatically without manual exposure control Final recommendation: Required purchase for any DJI Mini 5 Pro owner serious about video quality. Professional aerial cinematography is technically impossible without appropriate ND filters in fixed aperture cameras such as the Mini 5 Pro. This kit represents the most affordable entry to the professional workflow without compromising visible results.