Step 6Sanding process
Using a Dremel sanding band, sand away the remaining plastic of the Cokin filter away.
The glass filter element will prevent you from over-sanding.
A piece of wood can be used to prevent the plastic from vibrating during the cutting/sanding process.
You might need to use sandpaper to sand the edges down to fit it into the filter ring.
Try not to over-sand till it's smaller than the original filter glass, or else light will leak through.
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