New glare tube by Robert Nibbs (System Gemini) Designed to fit specific applications without the need for (expensive) adaptors 22mm diameter only 45mm long Female threaded at the open end to allow stacking if required Options available: Gehmann: this tube fits the modern Gehmann screw in irises with the removeable front plate without the need for the Gehmann 5022 adaptor Centra: this the modern Centra screw in irises (Beam/Glass/Duo etc) with the male threaded section hidden behind the knurled adjustment ring without the need for an adaptor High-End/Tunnel: this is the standard threaded glare tube that will fit into your standard 22m tunnel or Centra High End
