What is the fine-grained topic of the following text: Many 3D film-makers and hobbyists are utilizing the high quality, low-cost camcorders from JVC and SONY to produce documentaries, films, and personal videos, but desire more creative flexibility by adding auxiliary lenses, polarizers and filters to improve their end results. Only return the topic.
Using auxiliary lenses, polarizers and filters in 3D filmmaking with JVC and SONY camcorders