Kase Clip-in Filter For Sony Alpha Camera(MCUV/ND/Neutral Night/Dream Filter) | eBay
Amazon.com : Kase 4 in 1 Clip-in Filter Kit (MCUV/ND8/ND64/ND1000),Neutral Density ND & UV Protection Filters for Sony Alpha Camera A7/A7II/A7III/A7R/A7RII/A7RIII/A7RIV/A7S/A7SII/A7SIII/A9/A9II/FX3 : Electronics
Optolong L-Pro Sony Full Frame Clip Filter — Starizona
Amazon.com : Kase Clip-in ND8 ND0.9 3 Stops Filter,Built-in Camera ND Filter Optical Glass for Sony Alpha Camera A7/A7II/A7III/A7R/A7RII/A7RIII/A7RIV/A7S/A7SII/A7SIII/A9/A9II/FX3 : Electronics
Kase Clip-in ND 0.9 (3-Stop) Filter for Sony Alpha Half Frame Cameras
Kolari Magnetic Clip-In Filter Sets for Sony E-Mount (Full Frame) – Kolari Vision