New answers tagged gels
You could go the DIY route very inexpensively. In solar photography, a common solar filter is a mylar film, similar in thickness and flexibility to filter gels. Many people create their own solar filter holders. Examples to give you some ideas: $10 DIY Solar Filter for DSLR Camera The author cut up a cardboard folder into two 4" × 4" squares and a ...
Look at gel filter holders made by Lee. http://www.leefilters.com/index.php/camera-directory/camera-dir-list/category/gelsnap-filter-holder
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