For my Vixen DED 108SS, I needed something better than the massive abrupt step down from the 4" drawtube to the 2" camera interface - I felt I was losing/scattering some light, especially for the Sony Super HAD chip in the SXVR-M25C.
So, I drew this up in PS (I am not a CAD person), and sent it to my astronomer mate cum machinist (Hugh Esmond, aka Ubique on IIS). Hopefully he will have it back soon.
Anyway, I hope the design meets approval and I throw it out there for anyone to use. The cone attaches to the drawtube adapter and is rotatable, secured by 3 thumbscrews (with a square mortise, as you can see, for better security). The M42 screws onto the camera face. You can then freely rotate the camera without any special anything
The dimensions are specific to the Vixen DED108SS, so vary as needed.
