Ultralight 3", 5", 8", 12", 16" Double Ball Arm Effective length:8 inch / 20 cm * Never put wet lens

* Never put wet lens cover on compatible lens/port on land

Looking for a filter for your DL Flat Port # 75301

[air] 300g / 10

Howshot 140mm optical fisheye port with lens hood (removable) for Sea&Sea NX / S120 port system

(*8) Some "conventional" or " high-capacity" NiMH rechargeable batteries have significant self-discharge and heat-generating characteristic resulting difficulty to keep their performance during usage

Ultralight 3", 5", 8", 12", 16" Double Ball Arm Effective length:8 inch / 20 cm * Never put wet lens3", 5", 8", 12" Double Ball Arm As ilustrated above there are lots of combinations you can have for arms. The still photographer usually uses a double arm whether of equal lengths or unequal lengths. The videographer usually uses a single arm length (requires one less clamp). Arm length is based on what type of photography you intend to do. If you only do macro then you want a small compact arm that will reach your subjects. If you do only wide angle