TEC APO250VT f/8.8 Fluorit The TEC 250 mm fluorite refractor provides a 2200 mm focal length at f/8.8. Its air-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 APO250VT f/8.8 Fluorit · Specifications checked against manufacturer data on 2026-11-04
The TEC 250 mm fluorite refractor provides a 2200 mm focal length at f/8.8. Its air-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 titanium 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. Camera spacing should follow the drawing for the selected optical configuration.
Dimensions and configuration
The manufacturer lists an OTA weight of 50 kg and a retracted/transport length of 2000 mm. Precision adjustable tube rings are included with this model.
Current exact-model TEC page used; old ED or earlier-generation manuals are not substituted. Published metric dimensions are selected where imperial conversions disagree.
TEC APO250VT f/8.8 Fluorit The TEC 250 mm fluorite refractor provides a 2200 mm focal length at f/8.8. Its air-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 APO250VT f/8.8 Fluorit · Specifications checked against manufacturer data on 2026-11-04
