telescope
TEC
APO140FL f/7
140mm Apo triplet fluorite · 980mm f/7.0
Fluorite triplet widely used for deep-sky imaging. Image circle, full-frame coverage and OTA weight are not published by TEC.
Best for
- Medium-sized galaxies and planetary nebulae
Specifications
| Optics | |
| Type | refractor |
| Optical design | Apo triplet fluorite |
| Aperture | 140mm |
| Focal length | 980mm |
| Native f/ratio | f/7.0 |
| Image circle | — |
| Full-frame support | No |
| Physical | |
| Weight | — |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 2.10° × 1.40°
Scale 0.79″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 1.37° × 0.92°
Scale 0.79″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 0.66° × 0.66°
Scale 0.79″/px
Typical targets
- M101 — Pinwheel GalaxyGalaxy · 28.8′Plan this target
- NGC 2175 — Emission Nebula NGC 2175Emission Nebula · 29′Plan this target
- NGC 5457 — Pinwheel Galaxy NGC 5457Galaxy · 29′Plan this target
- M20 — Trifid NebulaEmission Nebula · 28′Plan this target
- M35 — Open Cluster M35Open Cluster · 28′Plan this target
- M47 — Open Cluster M47Open Cluster · 30′Plan this target
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Source: telescopengineering.com