Specification Brand : Bewinner BulletPoint1 : Secure Connection: Equipped with 2 fixed screws to support connecting 2 inch telescope eyepieces and astrophotography filters, preventing damage to telescope accessories. BulletPoint2 : Extended Focusing Needed: Often requires more focusing distance when observing short distances on the ground with a telescope or using field flatteners, correctors, or reducer lenses. BulletPoint3 : Universal Compatibility: Features front end with M48x0.75mm thread for use with 2 inch telescope eyepieces and astrophotography filters, ensuring a secure fit. BulletPoint4 : Functional Design: Provides extra focusing distance to increase length extension. Sometimes necessary for certain eyepiece or telescope camera combinations for focusing. BulletPoint5 : Sturdy Construction: Anodized black finish prevents unnecessary reflections. Made of solid aluminum alloy material for strength, durability, and wear . ItemName : Telescope Extension Tube, Copper M48x0.75mm Threads Reduce Reflections Telescope Length Extension Tube for Astrophotography Filters (60mm) ItemPackageDimensions_Height : 6 centimeters ItemPackageDimensions_Length : 15 centimeters ItemPackageDimensions_Width : 8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : photo-adapters Manufacturer : Bewinner ModelName : Bewinner2dige6owxs-13 ModelNumber : Bewinner2dige6owxs-13 PartNumber : Bewinner2dige6owxs-13 ProductDescription : 1. Functional Design: Provides extra focusing distance to increase length extension. Sometimes necessary for certain eyepiece or telescope camera combinations for focusing. 2. Extended Focusing Needed: Often requires more focusing distance when observing short distances on the ground with a telescope or using field flatteners, correctors, or reducer lenses. 3. Secure Connection: Equipped with 2 fixed screws to support connecting 2 inch telescope eyepieces and astrophotography filters, preventing damage to telescope accessories. 4. Universal Compatibility: Features front end with M48x0.75mm thread for use with 2 inch telescope eyepieces and astrophotography filters, ensuring a secure fit. 5. Sturdy Construction: Anodized black finish prevents unnecessary reflections. Made of solid aluminum alloy material for strength, durability, and wear .