150mm is mainly used for film cameras, or lenses with a diameter of 86mm or more. In actual use, some photographers like to add a hood, so that the diopter from the the lens have a distance, this situation require a smaller diopter . Because diopter away from the lens, equivalent to a longer length. Suitable for any lens, it can be easily controlled with two fingers to achieve. Special Effects: The Handheld diopter filter can blur the irrelevant scene around the picture and focus on the middle of the picture, which is suitable for taking pictures of people. Flexible Use: The special effect filter is suitable for the lens of 150mm, and the lens of different diameter can be converted through the adapter ring. Different lengths have different effects. Premium Material: Made of optical glass and Metal, it provides ultra high clarity, wear , and can be used for a long time. : Equipped with a finger grip, it is easy to hold in front of the lens to manipulate effects, and you can take some amusing effects. A useful accessory in scenes such as characters, landscapes, and night scenes. Color: As Shown Material: Metal+Glass Package Contents: 1 x Lens Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.