Baader Clearglass Filter (C) for focusing / dust protection
Amazon.com : B + W Clear Protection Filter for Camera Lens – Ultra Slim Titan Mount (T-PRO), 007, HTC, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 39 mm : Electronics
ZWO 1.25" Low Profile Clear Filter | High Point Scientific
Sigma 35mm f/1.4 DG HSM ART Lens for Canon EF w/Haida 67mm CPL+Clear Filter Kit | eBay
B + W 72mm UV Protection Filter (010) for Camera Lens - Xtra Slim Mount (XS-PRO), MRC Nano, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 72 mm, Clear Protector - Walmart.com
72mm ND8 (3 Stop) Neutral Density Filter + CPL Circular Polarising Filter for Camera Lens - KENTFAITH
Canon 112mm Clear Protective Filter for Cine-Servo 1823A103 B&H
MK-EFTE-C Drop-in Filter Mount Adapter EF/EF-S lens to Sony E mount ca — Meike Global
Sigma 50-100mm f/1.8 DC HSM Art Lens for Nikon F w/Haida CPL+Clear Filter Kit 693955 F
Camera Lens | Uv Filter | Camera Filters - Hd Uv Filter Camera Lens 43 46 49 52 58 62 67 - Aliexpress
Nisi's new 114mm push-on UV and bargain priced 5.65x4 clear filters protect your cine lens from the elements - Newsshooter
Amazon.com : B + W Clear Protection Filter for Camera Lens – Ultra Slim Titan Mount (T-PRO), 007, HTC, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 39 mm : Electronics