Feature: 1. For Nikon AI mount camera lens can be used with the 2inch 60mm/2.4in eyepiece extension tube and T2‑AI Adapter set to photograph astronomical images such as stars or nebulae. 2. The effective working length of the extension tube is 60mm/2.4in, which can enlarge the picture and facilitate the observation of more details. 3. It is made of high quality aluminum alloy and is strong and durable, and its surface is painted anti‑oxidation and anti‑corrosion. 4. The inner wall is matted to avoid the effect of reflected light on the image. 5. Suitable for Nikon AI Mount SLR camera. Through the standard adapter ring, it can be installed on the for Nikon camera for shooting distant objects. Specification: Item Type: Telescope for SLR Camera Kit Material: Aluminium Alloy Color: As Pictures Shown Weight: Approx. 240g/8.5ozApplicable Model: Suitable for Nikon AI Mount SLR Camera . Package List: 1 x Extension Tube 1 x 2in to T Adapter (Installed)1 x Camera Mount Adapter