3x3 filters in a 4x4 holder

[thekreative]

This is a really easy way to save a ton of money on filters. I just got 30 3x3 Tiffen filters with a few 4x4 that I wanted.
OK get a large black dvd cover. trace a 4x4 filter or cut a 4x4 square. Nick off the corners to fit in the holder. Then trace the 3x3 into the center of the plastic with the blade angled to get the hole just a bit smaller. Then you fit the 3x3 into the opening. being a tiny bit smaller the filter is wedged and doesn't more at all.

The filters are the same quality as the 4x4 and if you are using a 35mm adapter most lenses are small than 3x3

[MatzeB]

I don't get it. What prevents the filter from falling out?

[thekreative]

if you cut the opening just under the size of the filter the plastic is soft enough to bend and hold the filter with friction. Its really stuck in the holder quite well. $25 for a Tiffen filter over $100 is a fair bit for the same glass

[MatzeB]

ah ok