telescopecomparison · 2-way
SharpStar 100QII vs SharpStar 140PH
SharpStar
100QII
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
SharpStar
140PH
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-44% focal length
-29% aperture
Faster by 1.5 f-stops
Specifications
| Specification | SharpStar 100QII | SharpStar 140PH |
|---|---|---|
| Optics | ||
| Type | refractor | refractor |
| Optical design | Quadruplet astrograph | Apo triplet FPL-53 |
| Aperture | 100mm | 140mm |
| Focal length | 550mm | 980mm |
| Native f/ratio | f/5.5 | f/7.0 |
| Image circle | 44mm | 52mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 5.5kg | 9.5kg |
Advantages of SharpStar 100QII
- Wider field — 550mm vs 980mm focal length
- Faster optics at f/5.5 vs f/7
- Lighter (5.5kg vs 9.5kg) — easier to travel with
Advantages of SharpStar 140PH
- Tighter framing — 980mm vs 550mm focal length
- 40% more light-gathering aperture
- Larger image circle (52mm) — supports bigger sensors
Best for — SharpStar 100QII
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — SharpStar 140PH
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
SharpStar 100QII — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.75° × 2.50°Scale: 1.41"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.45° × 1.64°Scale: 1.41"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.18° × 1.18°Scale: 1.41"/px
SharpStar 140PH — typical FOV & 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
SharpStar 100QII — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
SharpStar 140PH — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.