A zoom gear for the Canon EF8-15mm F4L Fisheye USM in combination with Dome Port 2 + Shade 2 Set / Extension Ring 18 or Dome Port 115 / Extension Ring 18.

Further supports EF16-35mm F2.8L II USM in combination with Dome Port 2 + Shade2 Set / Extension Ring M / Extension Ring 36 or Dome Port 115 / Extension Ring M / Extension Ring 36.
The product comes with Shade Sponge D80 which shades built-in flash light to prevent it from exposing on an image.

Compatible Lens
  Canon EF-S10-18mm F4.5-5.6 IS STM (zooming operation)