You Have To Purchase The Optional, "Front QR Adapter" Specific To Your Scopes Ocular Lens Size Per The AGM Manual Options Of: 30mm, 44mm, 50mm, And, 56mm Sizes Available. The Adapters, M52X0.75 Threaded End Interfaces/Screws And Locks Into The Thermals Devices Ocular Lens, Then The Other End Clamps On, And Secures To Your Scopes Front Objectice Lens, Via The QR Designed Feature, For A Secure And Aligned Fit.
After reviewing the operation manual, It doesn't say. Sorry, I wish I had an answer.