Other types of prisms are a great place to get started! However, they don't achieve the utility of the Fractal Filter. The shape of a prism is its most limiting aspect--prismed glass that is not designed specifically for photography usually only has one or two applications or effects that can be achieved with it, therefore limiting its use. I've focused making our shapes and designs such that each filter produces several different effects depending on its angular position from the lens, far increasing its utility. My glass also uses lead oxide, which will get you a better optical result than that of a normal glass prism. Prisms are also difficult to hold, you'll often get your fingers in your frame on accident; our handle is designed so this won't happen to you. Overall, using Fractal Filters is an all-around better experience and is capable of creating a better end-product!