The extension tube extends an adapter with M48x0.75 thread by 3 mm.

• barrel made of metal
• black anodized
• double sided 2" filter thread (M48x0.75) - male/female
• optical path is 3 mm
• the outer diameter of the adapter is is exactly 2" - fits into the 2" receptacle of focusers or adapters

The extension tube extends an adapter with M48x0.75 thread by 5 mm.

• barrel made of metal
• black anodized
• double sided 2" filter thread (M48x0.75) - male/female
• optical path is 5 mm
• the outer diameter of the adapter is is exactly 2" - fits into the 2" receptacle of focusers or adapters

The extension tube extends an adapter with M48x0.75 thread by 30 mm.

• barrel made of metal
• black anodized
• double sided 2" filter thread (M48x0.75) - male/female
• optical path is 30 mm
• the outer diameter of the adapter is is exactly 2" - fits into the 2" receptacle of focusers or adapters

The extension tube extends an adapter with M48x0.75 thread by 10 mm.

• barrel made of metal
• black anodized
• double sided 2" filter thread (M48x0.75) - male/female
• optical path is 10 mm
• the outer diameter of the adapter is is exactly 2" - fits into the 2" receptacle of focusers or adapters

The extension tube extends an adapter with M48x0.75 thread by 15 mm.

• barrel made of metal
• black anodized
• double sided 2" filter thread (M48x0.75) - male/female
• optical path is 15 mm
• the outer diameter of the adapter is is exactly 2" - fits into the 2" receptacle of focusers or adapters