- Fully metal construction and anodizing aluminum process, durable for long time use. - Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. - The extension tube has a T2 interior thread and a T2 exterior thread for solving spacing problems in astrophotography and eliminates a range of focusing problems. Specification: - Type: Astronomical T2 thread Extension Tube - Male thread: 42mmx0.75mm - Female thread: 42mmx0.75mm - Color: Black - Material: Aluminium. Package - 1 x Lens Tube.
eBay