The adapter ring is used to connect the lens of the camera lens with the insert bracket, the lens aperture are: 52mm 55mm 58mm 49mm 62mm 67mm 72mm 77mm 82mm. Insert bracket can only be used for non use wide-angle lens! 49~82mm can be installed among any of the ring, through the ring can be screwed to the lens on the lens and through the card slot can be inserted into the square lens, so as to achieve the effect of lens loading! A piece can be inserted 2-3 square filter, lens can also move up and down, to adjust the suitable style color photograph! Square filter special hood can be directly installed to use the bracket, according to the needs of 1~5 can be used to match a hood superimposed using wide-angle lens, telephoto lens, header. A total of 24 color filter type, 11 of them are graded, 12 models for the mirror and a mirror set panchromatic sunset in 24 lenses including the following color (with adapter ring 9, lens bracket 1, a total of 1 square hood) red, brown, purple 2 3, 4 blue, yellow, green 5 6, 7, 8 full orange pink, 9 ND2, 10 ND4 ash grey, 11 ND8, 12 ND16 ash grey, 13 red, 14 graded tea, 15 shades of pink, gradient 16 sunset, 17 yellow gradient and 18 purple, 19 gradient gradient 20 green, orange, blue, 21 gradient gradient of 22 ND2 and 23 ND4 gradient gray gradient, 24 graded ND8 size: length 9.3cmx width 8.5cmx thickness 0.2cm, inserted on the bracket for 49mm~ Phi Phi 82mm diameter greater than 20mm, the focal length of lens can be adjusted according to the position of the lens needs to adapt to the color range, Thus, the color of the color effect can be better and more vivid by moving the lens. The use of different color filters can increase the color saturation, increase concentration, and other photo effects. The gradient is high level mirror filters, color photography necessary, it can reduce the local gradient mirror picture brightness control, local contrast, avoid the sky or Flash prospects such as overexposure, can make the dull sky blue, clouds, and can create a special time atmosphere, rendering the subjective personality of the sky color. Use should be based on the needs of the composition and the horizon level, the position of the mobile gradient lenses to adjust the gradient line up and down (which is a screw filter not to do); large aperture (or long focal length) will dilute soft gradient line, so we should make use of the aperture depth prediction function to real aperture to shrink adjust the gradient line position, avoid in the viewfinder. The feeling is very good, the photos came out after the discovery of the gradient line went below to the phenomenon. The color of the lens is gradual, the filter coefficient is respectively test light and dark two parts. The maximum effect of the gradient mirror is the balance of light, so there is no need for exposure compensation, the compensation value can be seen as a "pressure" contrast, or the degree of color of the lens. Use separately for "two part of light day" and "land", in the light of difference ratio, choose light colored or dark filters, and monolithic or multi disc filter. Note, some lenses will drive the filter rotate in AF, then just use your fingers to gently holding the seat.