Lower scope - Sentinel 80 with ST-4 Sbig auto guider.
Middle scope - Tec 140 with Tec field flattener - Pentax 67 medium format camera with Hutech vacuum back.
Top - Pentax 400 EDif lens with Pentax 67. Guide ring around lens end for support to prevent flexure during 90 minute exposures.

Losmandy G11 with Gemini. Observatory roof rolled off. Walls are 6 ft high.