TEC 110 Fluorite Apochromatic Triplet
The TEC APO 110 FL f/5.6 is a compact, high-performance wide-field refractor designed for both demanding astrophotography and visual observation. This lightweight, transportable telescope with fluorite optics offers outstanding performance in a versatile, fast astrograph package.
This APO110FL features a powerful, oil-spaced apochromatic triplet lens with a central fluorite element (CaF2). This optical design offers exceptional color correction across the entire spectrum, with multi-layer hydrophobic coatings on the front lens improving light transmission and repelling moisture and dust. The lens is mounted in a precision-machined aluminum cell that provides excellent thermal stability. Its lightweight aluminum tube features carefully designed baffles and anti-reflective coatings to ensure high contrast and eliminate stray light. The dewshield is retractable.
A newly redesigned TEC focuser with fine adjustment on both sides ensures smooth, precise adjustments, ideal for photography and mobile setups alike. The fine-focus knobs are plated with pure gold to protect against oxidation and ensure long-term reliability. The focuser can be rotated freely, allowing cameras or eyepieces to be positioned conveniently.
The TEC 110 is compact enough for air travel and is available with optional compact or rugged carrying cases. It is a modern evolution of TEC's classic small refractor, streamlined, efficient, and built for serious results.
Each APO110FL F/5.6 is (optionally) equipped with:
- TEC dual-speed focuser with fine focus knobs on both sides
- Optional full-frame field flattener with diffraction-limited performance
- Versatile mounting options with standard and imaging tube rings
- Two case options for portability and protection
Compact and powerful – the TEC APO110FL is the uncompromising choice for visual observers and astrophotographers who demand performance in a small, travel-friendly format.
TEC telescopes are subject to rigorous testing in order to ensure top-notch performance. Newton rings are used throughout the glass manufacturing process and any remaining imperfections are corrected with an interferometer. Each telescope is then extensively tested to achieve the best possible Strehl ratio.
You can be sure that your telescope has been optimized to be as optically perfect as possible. If the lens does not meet expectations, the telescope will not be shipped.
TEC does not publish test reports on telescopes as general principle.
Although the lenses are fine-tuned under interferometric control to meet the highest optical standards, cosmetic defects may occur on the lens and tube. Rest assured that any defects on the telescope do not affect its optical performance!

TEC APO 110 f/5.6 Fluorite Apochromat
Product Details
- SKU1351110
- EAN Code4047825060853
- ManufacturerTEC
- Net weight (kg)5.05
Optics
- Aperture110 mm (4.3")
- Backfocus163 ±1 mm
- Barrel Size (in)2"
- Focal Length616 mm
- Focal Ratiof/5.6
- Image Scale5.58 arcmin/mm
- Length of tube490–700 mm
- Optical DesignApochromatic Refractor
- Optical Tube Weight4.4 kg (with tune rings + 1 kg )
- Resolution (DAWES)1.05 arc sec
- Tube diameter (max)4.5" / 113.6 mm
Included Items
- Focuser3,5" TEC Dual-Speed Focuser
Mount
- MountNo mount (OTA only)




