The CSM-210 features the possibility of an optional Quick-Lock mounting system that attaches directly to the front lens barrel. If required, this mattebox can also be attached to the camera with a 15mm lightweight support. This mattebox accommodates a 3x 3" through a 4x 6" filter & works with most wide angle lenses in both 4:3 & 16:9 aspect ratios. The CSM-210 has one rotatable 4"x 4" filter tray & place for one fixed 4"x 4" filter in the front end of the hood. The CSM-210 is wide enough to work on most cameras with wide angle without vignetting. Although the CSM-210 can be used as a clip-on mattebox, we recommend the use of a barsadapter & a 15mm mattebox support. This mattebox comes standard with: 1pc. 4"x 4" filter frame (Note: use 4"x 4" filters for video camera use, not 100x 100 mm photo accessory filters) Weight of mattebox with filter frame: 330 gram including bars adapter