telescopecomparison · 2-way
TEC APO180FL f/7 vs William Optics FLT 156
TEC
APO180FL f/7
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
William Optics
FLT 156
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+16% focal length
+15% aperture
Specifications
| Specification | TEC APO180FL f/7 | William Optics FLT 156 |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo triplet fluorite | Apo triplet FPL-53 |
| Aperture | 180mm | 156mm |
| Focal length | 1260mm | 1085mm |
| Native f/ratio | f/7.0 | f/7.0 |
| Image circle | — | 52mm |
| Full-frame support | No | Yes |
| Physical | ||
| Weight | — | 11.5kg |
Advantages of TEC APO180FL f/7
- Tighter framing — 1260mm vs 1085mm focal length
- 15% more light-gathering aperture
Advantages of William Optics FLT 156
- Wider field — 1085mm vs 1260mm focal length
- Larger image circle (52mm) — supports bigger sensors
Best for — TEC APO180FL f/7
- Small galaxies, planetary nebulae, lunar & planetary detail
Best for — William Optics FLT 156
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
TEC APO180FL f/7 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.64° × 1.09°Scale: 0.62"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.07° × 0.71°Scale: 0.62"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.51° × 0.51°Scale: 0.62"/px
William Optics FLT 156 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.90° × 1.27°Scale: 0.71"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.24° × 0.83°Scale: 0.71"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.60° × 0.60°Scale: 0.71"/px
TEC APO180FL f/7 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
William Optics FLT 156 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
