Impossible ND Filter Twin Pack for use with Polaroid SX-70 Camera & 600 ASA film Camera Accessories - Newegg.com
How do I install a neutral density film pack filter? – Polaroid Support
Amazon.com : Polaroid Optics 77mm 3-Piece Filter Kit Set [UV,CPL,FLD,& Neutral Density] includes Nylon Carry Case – Compatible w/ All Popular Camera Lens Models : Electronics
Gear Review: Polaroid Variable ND Filter | LG Visuals ⎟ Lewis Gething Visuals Blog
ND Filter for Polaroid Film - Double Pack
ND Filter for SX-70 | MiNT Camera
How to make a film pack ND filter for your Polaroid SX-70 – Angie Muldowney
Gear Review: Polaroid Variable ND Filter | LG Visuals ⎟ Lewis Gething Visuals Blog
Amazon.com : Polaroid Optics 43mm Multi-Coated Variable Range [ND3, ND6, ND9, ND16, ND32, ND400] Neutral Density Fader Filter ND2-ND400- Compatible w/ All Popular Camera Lens Models : Camera Lens Neutral Density Filters :
These ND-filters have been out of stock for an eternity... Any cheap alternatives for 600 film in SX-70? : r/Polaroid