A while ago I got this inexpensive inferred filter and tried it and did not work and did not do much else with it. Recenty  I decided to take it out and play with it. 

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The results were interesting as you can see and very harsh red because of the "inferred". The filter is very dark so you have to have a long exposure to capture the light through the filter. One of the things I dont like about the filter is its very hard to see what you are photographing because of the dark filter. Some of the results I got were better then others and there are a few I like.