Tele Vue 5.5mm Nagler Type 7 T-adapter it also has many features

it also has many features

Using a 2" extension tube would alleviate this problem

It is the Lunt LS100THa H-alpha scope

Please note that

Tele Vue 5.5mm Nagler Type 7 T-adapter it also has many featuresAvailability: Tele Vue anticipates that the eyepieces will be available early summer of 2025 Concept: The Nagler Type 7 series was developed as a natural extension of our highly regarded, 85, limited edition Apollo 11 eyepiece. However, the series can also be thought of as an extension of the long eye relief Nagler Type 4 concept. With the all new Type 7 design layout, we achieved our goal of Apollo 11 like performance across a series of focal lengths