Amazon.com : Polaroid Optics 67mm Neutral Density Filter [ND 0.6] Compatible w/ All Popular Camera Lens Models : Camera Lens Neutral Density Filters : Electronics
What does a neutral density filter do? – Polaroid Support
Polaroid Originals ND Filter for SX-70 Cameras (2-Pack) 004741
Handmade ND Filter for SX-70 | Use Polaroid 600 Film in Your SX-70! | eBay
Handmade ND Filter for SX-70 Cameras Use Polaroid 600 Film in Your SX-70 - Etsy
ND Filters for SX-70 Instant Film Cameras (2-Pack)
Camera Filter ND Filter Adjustable 30/37/40.5/43/46/49/52/55/58/62/67/72/77/82/86mm Glass ND2-400 Neutral Density Fader Variable
Amazon.com : Polaroid Optics 82mm Multi-Coated Variable Range [ND3, ND6, ND9, ND16, ND32, ND400] Neutral Density Fader Filter ND2-ND2000 - Compatible w/ All Popular Camera Lens Models : Camera Lens Neutral Density
Using old sunglasses lens for a quick/cheap ND filter. : r/Polaroid
Gear Review: Polaroid Variable ND Filter | LG Visuals ⎟ Lewis Gething Visuals Blog
Polaroid ND Filter for SX-70 Cameras (2 Pack) – JZS Camera & Electronics
How to make a film pack ND filter for your Polaroid SX-70 – Angie Muldowney