Welcome to the Optefex blog. Optefex is a unique, boutique filter company. Subscribe to our blog to see what we're up to and get updates on new filters. Filters available through The DoP Shop
Also note: we are making all square/rectangular sizes from 3"x3" to 6.6"x6.6" as standard - http://www.thedopshop.com/product_info.php?cPath=25&products_id=95
