TEC 0.9x Focal Reducer Corrector for APO 200 FL / 250VT
€1,250.00
Tax included
TEC 0.9x Focal Reducer Corrector for APO 200 FL / 250VT The TEC FRC 0.9× combines field flattening with a 10% reduction in focal length. TEC specifies a 51 mm image circle, or a 36 × 36 mm square format, with approximately 10% corner vignetting.
Manufacturer model: TEC 0.9x Focal Reducer Corrector for APO 200 FL / 250VT · Specifications checked against manufacturer data on 2026-11-04
TEC 0.9x Focal Reducer Corrector for APO 200 FL / 250VT
The TEC FRC 0.9× combines field flattening with a 10% reduction in focal length. TEC specifies a 51 mm image circle, or a 36 × 36 mm square format, with approximately 10% corner vignetting.
Model-specific optical spacing
The current manufacturer table gives two separate spacing references for APO250VT f/8.8: “Back Focus Range” is 103 mm, while “Back Focus Real” is 100 mm. These are different mechanical references, so use the drawing and adapter that match the imaging train.
Focuser connection
The FRC fits the Starlight Instruments FTF3545 focuser. With the named APO250VT f/8.8, applying the 0.9× factor gives a calculated 1980 mm focal length at approximately f/7.92. TEC supplies the reducer configuration for the telescope specified when ordering.
APO200 compatibility
TEC describes FRC availability for all its telescope models, but the current table publishes spacing for APO250VT rather than APO200FL. The APO250 values above must not be used as an APO200 spacing specification.
TEC 0.9x Focal Reducer Corrector for APO 200 FL / 250VT The TEC FRC 0.9× combines field flattening with a 10% reduction in focal length. TEC specifies a 51 mm image circle, or a 36 × 36 mm square format, with approximately 10% corner vignetting.
Manufacturer model: TEC 0.9x Focal Reducer Corrector for APO 200 FL / 250VT · Specifications checked against manufacturer data on 2026-11-04
