telescope
William Optics
GT 102
102mm Apo triplet FPL-53 · 703mm f/6.9
Triplet astrograph.
Best for
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Specifications
| Optics | |
| Type | refractor |
| Optical design | Apo triplet FPL-53 |
| Aperture | 102mm |
| Focal length | 703mm |
| Native f/ratio | f/6.9 |
| Image circle | 44mm |
| Full-frame support | Yes |
| Physical | |
| Weight | 5.6kg |
Typical FOV & image scale
With Full-frame (36×24mm, 3.76µm)
FOV 2.93° × 1.96°
Scale 1.10″/px
With APS-C (23.5×15.7mm, 3.76µm)
FOV 1.92° × 1.28°
Scale 1.10″/px
With IMX533 square (11.3×11.3mm, 3.76µm)
FOV 0.92° × 0.92°
Scale 1.10″/px
Recommended accessories
- William Optics Flat 6AII 0.8x Reducerreducer · 0.8× focal lengthmanufacturer supported
Typical targets
- NGC NGC 2070 — Tarantula NebulaEmission Nebula · 40′
- NGC NGC 6334 — Cat's Paw NebulaEmission Nebula · 40′
- NGC NGC 6820 — Emission Nebula NGC 6820Emission Nebula · 40′
- IC IC 410 — Tadpoles NebulaEmission Nebula · 40′
- Messier M41 — Open Cluster M41Open Cluster · 38′
- IC IC 405 — Flaming Star NebulaEmission Nebula · 37′
Recommended cameras
28.4mm sensor · 4.78µm px · cooled
Compare pairing28.3mm sensor · 3.76µm px · cooled
Compare pairing28.3mm sensor · 3.76µm px · cooled
Compare pairing