TEC APO140 FL f/7 Triplet The TEC 140 mm fluorite refractor provides a 980 mm focal length at f/7. Its oil-spaced fluorite triplet is intended for visual observing and astronomical imaging. The fluorite element is calcium fluoride, positioned between the two outer elements of the triplet.
Manufacturer model: TEC APO140 FL f/7 Triplet · Specifications checked against manufacturer data on 2026-11-04
The TEC 140 mm fluorite refractor provides a 980 mm focal length at f/7. Its oil-spaced fluorite triplet is intended for visual observing and astronomical imaging. The fluorite element is calcium fluoride, positioned between the two outer elements of the triplet.
The objective uses a precision aluminium cell. An aluminium tube with internal anti-reflective treatment and baffles helps suppress stray light.
The supplied focusing arrangement is Starlight Instruments Feather Touch FTF3545; rotating; 9:1 fine reduction; 2-inch collet. TEC specifies 200mm from the focuser reference to the focal plane; this telescope backfocus is distinct from the spacing of an optional reducer or flattener.
The manufacturer lists an OTA weight of 8.2kg and a retracted/transport length of 840mm. Accessory-loaded weights, where supplied, are shown separately in the technical table.
TEC manufacturer documentation
Current exact-model TEC page used; old ED or earlier-generation manuals are not substituted. Published metric dimensions are selected where imperial conversions disagree. Additional focuser-extension row omitted: source pairs 3.5 inches with 114 mm, which are not equivalent.
| Working length mid focus | 1090mm |
|---|---|
| Center of gravity from the middle of the focusing knob 2 5 lbs 1 kg load | 352mm |
| Center of gravity from the middle of the focuser telescope retracted | 406mm |
| Weight with rings plate handle finder | 9.5kg |
Data sheet
TEC APO140 FL f/7 Triplet The TEC 140 mm fluorite refractor provides a 980 mm focal length at f/7. Its oil-spaced fluorite triplet is intended for visual observing and astronomical imaging. The fluorite element is calcium fluoride, positioned between the two outer elements of the triplet.
Manufacturer model: TEC APO140 FL f/7 Triplet · Specifications checked against manufacturer data on 2026-11-04
