NiSi 52mm PRO Nano IRND 3.0 Filter (10-Stop) NIR-ND3.0-52 B&H
Amazon.com : High Definition 52mm 10-Stop NDX Neutral Density Variable Filter for Samsung NX 50-200mm f/4.0-5.6 OIS Zoom Camera Lens & Samsung NX 60mm f/2.8 Macro Camera Lens – Fixed : Electronics
Zomei 52mm Nd1000 Slim Hd Mc Nd Filter 10-stop/3.0 Neutral Density Gray Lens Filter For Canon Nikon Sony Pentax Leica Olympus - Camera Filters - AliExpress
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Pig Iron 52mm Pro ND1000 Filter. 10 Stop Neutral Density. High Index Glass | eBay