01.01 · Provisional page
Teleskop Service TS 102ED f/7
102 mm ED refractor used at f/5.6
The Teleskop Service TS 102ED is the main imaging telescope: a 102 mm ED refractor with a native focal length of 714 mm and an f/7 focal ratio. In my setup it is paired with a 0.8× reducer-flattener, bringing the system to approximately 571 mm and f/5.6 for a wider field of view. The photograph also identifies the smaller dew-control components: a heater band on the main telescope, another on the guide scope and a temperature probe attached to the side. Although these belong to the control electronics, showing them on the optical tubes makes their purpose easier to understand.
Main capture
Technical specifications
- Telescope type
- ED refractor
- Objective
- Air-spaced 2-element ED objective with Ohara FPL-51 glass (Japan)
- Aperture
- 102 mm
- Native focal length
- 714 mm
- Native focal ratio
- f/7
- With 0.8× reducer
- Approx. 571 mm · f/5.6
- Coating
- Fully multi-coated
- Resolution
- 1.14″
- Visual limiting magnitude
- 12.7 mag
- Mechanical focuser
- 2.5″ rack-and-pinion, M63 and M68 threads, with micro-gear reduction
- Tube material
- Aluminium
- Tube weight
- 3.98 kg
- Dew shield
- 122 mm diameter
- Dimensions
- 733 mm long · 105 mm diameter
- Tube rings
- CNC rings with 5 female M6 threads on each side