Shorter Extension Tube Spacer Ring for SCT chmidt-cassegrains Telescope

• Shorter Extension Tube Spacer Ring for SCT chmidt-cassegrains Telescope
• One Side : standard SCT male thread (2"x24 TPI) . The other side: standard SCT female thread
• Effective Space length: 15mm (0.59"). Total length: 23.5mm(0.92")
• Machined of high quality aluminum and anodized black.
• M48x0.75 standard filter thread inside the tube and comes with a filter thread press ring. You can fix a filter lens inside.

Shorter Extension Tube Spacer Ring for SCT chmidt-cassegrains TelescopeGosky