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.
Optical and mechanical construction
The objective uses a precision aluminium cell. An aluminium tube with internal anti-reflective treatment and baffles helps suppress stray light.
Focusing
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.
Dimensions and configuration
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.
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.
Additional specifications
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
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
