3-DX

Competing brands may differ from 3-DX by offering different features, designs, and technologies in their stereo optic disc cameras and photographic transparencies. They might have alternative pricing strategies, target different customer segments, or focus on unique selling points.3-DX is a good brand because it is actively maintained and believed to be owned by LenTec Corporation, which could imply a sense of reliability and stability in terms of product support and development.