telescopecomparison · 2-way
Celestron C6 SCT vs TEC APO140FL f/9.6
TEC
APO140FL f/9.6
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+12% focal length
+7% aperture
Slower by 0.4 f-stops
Specifications
| Specification | Celestron C6 SCT | TEC APO140FL f/9.6 |
|---|---|---|
| Optics | ||
| Type | sct | refractor |
| Optical design | Schmidt-Cassegrain | Apo triplet fluorite |
| Aperture | 150mm | 140mm |
| Focal length | 1500mm | 1345mm |
| Native f/ratio | f/10.0 | f/9.6 |
| Image circle | — | — |
| Full-frame support | No | No |
| Physical | ||
| Weight | 4.5kg | 7.7kg |
Advantages of Celestron C6 SCT
- Tighter framing — 1500mm vs 1345mm focal length
- Lighter (4.5kg vs 7.7kg) — easier to travel with
Advantages of TEC APO140FL f/9.6
- Wider field — 1345mm vs 1500mm focal length
- Faster optics at f/9.6 vs f/10
Best for — Celestron C6 SCT
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
Best for — TEC APO140FL f/9.6
- Small galaxies, planetary nebulae, lunar & planetary detail
- High-resolution long-exposure work
Celestron C6 SCT — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.38° × 0.92°Scale: 0.52"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 0.90° × 0.60°Scale: 0.52"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.43° × 0.43°Scale: 0.52"/px
TEC APO140FL f/9.6 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 1.53° × 1.02°Scale: 0.58"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.00° × 0.67°Scale: 0.58"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.48° × 0.48°Scale: 0.58"/px
Celestron C6 SCT — recommended user
Best suited for experienced imagers chasing detail running a portable travel rig.
TEC APO140FL f/9.6 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
