telescopecomparison · 2-way
William Optics FLT 132 vs SharpStar 61EDPH III
William Optics
FLT 132
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
SharpStar
61EDPH III
Best suited for beginners and wide-field enthusiasts running a portable travel rig.
Key differences
+176% focal length
+116% aperture
Slower by 1.5 f-stops
Specifications
| Specification | William Optics FLT 132 | SharpStar 61EDPH III |
|---|---|---|
| Optics | ||
| Type | refractor | Refractor |
| Optical design | Apo triplet FPL-53 | Doublet APO |
| Aperture | 132mm | 61mm |
| Focal length | 925mm | 335mm |
| Native f/ratio | f/7.0 | f/5.5 |
| Image circle | 52mm | 32mm |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 7.9kg | 2.4kg |
Advantages of William Optics FLT 132
- Tighter framing — 925mm vs 335mm focal length
- 116% more light-gathering aperture
- Larger image circle (52mm) — supports bigger sensors
Advantages of SharpStar 61EDPH III
- Wider field — 335mm vs 925mm focal length
- Faster optics at f/5.5 vs f/7
- Lighter (2.4kg vs 7.9kg) — easier to travel with
Best for — William Optics FLT 132
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — SharpStar 61EDPH III
- Wide-field nebulae and Milky Way regions
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
SharpStar 61EDPH III — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 6.16° × 4.11°Scale: 2.32"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 4.02° × 2.69°Scale: 2.32"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.93° × 1.93°Scale: 2.32"/px
William Optics FLT 132 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
SharpStar 61EDPH III — recommended user
Best suited for beginners and wide-field enthusiasts running a portable travel rig.