I’d like to know if the Polarizing Filter is available from a US vendor? I know I can order it directly from the official store but it feels a bit weird to pay $12 for a $10 piece that has a US origin.
No, SparkFun doesn’t stock it and they are fun custom designed for just OpenMV. We order these 1K at a time from Edmund Optics. You can’t buy them anywhere else. However, you can buy larger sheets from Edmunds and cut them down to size:
So… feel free to pay more for a larger sheet.