this lens has a manual focus ring with and interlocking follow focus gear to allow to be used in a cinema follow focus system.
this lens is for shooting video with dslr (vdsjr) cameras.
To use follow focus, the AF/M focus switch is placed in the M (Manual Focus) position before shooting.
亚博体育官网appAt the time of the normal photography, you can use autofocus.
the tokina at-x 107 dx nh v is fish-eye lens that gives the digital photographer an approximate 180° field of view with dramatic curvature of field of "fish-eye" effect. full corner to corner image can be achieved on an fx camera between approx. 14.5-17mm depending on the camera model, at 10-14mm there is a semi-circular view.
the hood has been removed from this lens for a wider image area and more coverage for full-frame sensor cameras. in cine/video use it demonstrates its preeminent power.