TEC APO180 f/7 Fluorit Triplet

TEC APO180 f/7 Fluorit Triplet

The TEC 180 mm fluorite refractor provides a 1260 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 210 mm ±1 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 16.5 kg and a retracted/transport length of 1130 mm. Accessory-loaded weights, where supplied, are shown separately in the technical table.

TEC manufacturer documentation

Compatibility notes

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. Current table gives 16.5 kg OTA weight; older January 2022 sketch gives 16.3 kg. Current named-model table selected.

Additional specifications