The INON Snoot Set for Z-240/D-2000 is an accessory for the INON "Z-240"- "D-2000W"- "D-2000Wn"- "D-2000"- "D-2000S"- "D-180"- "D-180S"- "Z-220F"- "Z-220S"- "Z-220" to change beam angle. The various combination of packaged parts supports 6 different beam coverage with the following sophisticated effects Ÿ?To block extra diffused light eliminating backscatter Ÿ?To highlight a subject by illuminating the subject only Ÿ?To give a spotlight effect on a subject etc. The Rubber Hood is securely attached on a compatible strobe via supplied dedicated aluminum sleeve which is screwed on diffuser mount screw holes on the strobe. *Always conduct test shots to familiar with the product characteristic before you take an important shot. When using the strobe in S-TTL Auto mode for spotlight effect of this product- spot metering mode on a camera is recommended since average metering mode or multi pattern metering mode could wash out the center of an image. In case S-TTL Auto mode does not provide appropriate exposure- use Manual mode. *"Z-240"- "D-2000W" -"D-2000Wn"- "D-2000" -"D-180" and "D-180S" combined with this product cannot support External Auto mode. *When you entry with this product being attached on a strobe- make sure to evacuate remaining air inside of the Rubber Hood before you get underwater. *Slave D Holder Unit 2 of the Optical D Slave Cable 2 Type L is not compatible with this product. *A diffuser panel cannot be used together with this product. *The Snoot Tube will reduce available intensity of the built-in Focus Light. *Make sure to cool down the strobe according to instruction manual / Compatible battery- operational limitation on flashing leaflet provided with the strobe- to prevent overheating / degradation of light emitting part / inner components. *Always extend the Rubber Hood 72 when using the Snoot Tube 10 or Snoot Tube 26 together to prevent possible damage on light emitting part and/or inner circuit of the strobe etc.