telescopecomparison · 2-way
SharpStar 140PH vs Tele Vue NP101is
SharpStar
140PH
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Tele Vue
NP101is
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Key differences
+81% focal length
+39% aperture
Slower by 1.6 f-stops
Specifications
| Specification | SharpStar 140PH | Tele Vue NP101is |
|---|---|---|
| Optics | ||
| Type | refractor | Refractor |
| Optical design | Apo triplet FPL-53 | Petzval |
| Aperture | 140mm | 101mm |
| Focal length | 980mm | 540mm |
| Native f/ratio | f/7.0 | f/5.4 |
| Image circle | 52mm | 40mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 9.5kg | 4.5kg |
Advantages of SharpStar 140PH
- Tighter framing — 980mm vs 540mm focal length
- 39% more light-gathering aperture
- Larger image circle (52mm) — supports bigger sensors
Advantages of Tele Vue NP101is
- Wider field — 540mm vs 980mm focal length
- Faster optics at f/5.4 vs f/7
- Lighter (4.5kg vs 9.5kg) — easier to travel with
Best for — SharpStar 140PH
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — Tele Vue NP101is
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
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
Tele Vue NP101is — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.82° × 2.55°Scale: 1.44"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.49° × 1.67°Scale: 1.44"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 1.20° × 1.20°Scale: 1.44"/px
SharpStar 140PH — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Tele Vue NP101is — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.