For astronomical use, you need a fast eyepiece change, without changing the orientation of the Diascope. We therefore provide the eyepiece adapter without a mounted sealing ring, so that the eyepieces can be switched easily. The bayonet has got an undercut, which serves to receive one of the two supplied O-rings. If you prefer a sealing ring, you can adjust the stiffness when switching eyepieces between tight (large O-ring) and light (small Oring) with these two different rings. The image shows the undercut to place the O-Rings
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|Focal Length||6 mm|
|Threaded for filters||Yes|
|Outer Diameter||41 mm|
|Inner Connection (eyepiece sided)||Clamp, 1¼"|
|Outer Connection (lens sided)||Bayonet|
|Barrel Size (in)||1¼"|