Optec Inc. 15mm T-Thread Extension Ring: Precision Spacing for Astrophotography

• T-Thread Compatibility: Designed to fit standard T-threaded connections, making it ideal for astrophotography setups.
• 15mm Extension: Provides an exact 15mm spacing, crucial for achieving the correct back focus in imaging systems.
• Easy to Use: Simple screw-on attachment for quick and efficient setup changes.
• Durable Build: Constructed with high-quality materials for lasting use and reliability.
• Versatile Use: Essential for photographers needing precise spacing adjustments in their telescope or camera setups.

Specifications

• Outside Diameter: 1.84" (46.74mm)
• Overall Height: .79" (20mm)
• Clear Aperture: 1.5" (38.1mm)
• Weight: .4oz (11.3g)
• Back-Focus Usage: .59" (15mm)