VCC 1050 Series Neon Panel Mount Indicator Light with Tab Terminals and Hi Hat Lens, 0.500-Inch/12.7mm Diameter, 125 Volt, Green: Electronic Components: Amazon.com: Industrial & Scientific
Lens indicator stickers for Canon RF rear lens caps | Field Made Co
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These Easy-to-Read Lens Labels Help You Quickly Identify Gear | PetaPixel
Custom Camera Lens Indicator Sticker Label Singles Packs - Etsy
These stylish labels make it easier to identify your lenses: Digital Photography Review
Military Standard MS25041-7 Green Lens Light, Indicator at SkyGeek.com
New: Field Made indicator labels for Nikon lenses and cameras - Nikon Rumors