telescopecomparison · 2-way
William Optics GT 102 vs William Optics FLT 132
William Optics
GT 102
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
William Optics
FLT 132
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-24% focal length
-23% aperture
Specifications
| Specification | William Optics GT 102 | William Optics FLT 132 |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Apo triplet FPL-53 | Apo triplet FPL-53 |
| Aperture | 102mm | 132mm |
| Focal length | 703mm | 925mm |
| Native f/ratio | f/6.9 | f/7.0 |
| Image circle | 44mm | 52mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 5.6kg | 7.9kg |
Advantages of William Optics GT 102
- Wider field — 703mm vs 925mm focal length
- Lighter (5.6kg vs 7.9kg) — easier to travel with
Advantages of William Optics FLT 132
- Tighter framing — 925mm vs 703mm focal length
- 29% more light-gathering aperture
- Larger image circle (52mm) — supports bigger sensors
Best for — William Optics GT 102
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — William Optics FLT 132
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
William Optics GT 102 — typical FOV & 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
William Optics FLT 132 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.23° × 1.49°Scale: 0.84"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.46° × 0.97°Scale: 0.84"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.70° × 0.70°Scale: 0.84"/px
William Optics GT 102 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
William Optics FLT 132 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.