telescopecomparison · 2-way
Tele Vue NP101is vs Tele Vue NP127fli
Tele Vue
NP101is
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Tele Vue
NP127fli
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
-18% focal length
-20% aperture
Specifications
| Specification | Tele Vue NP101is | Tele Vue NP127fli |
|---|---|---|
| Optics | ||
| Type | Refractor | refractor |
| Optical design | Petzval | Nagler-Petzval |
| Aperture | 101mm | 127mm |
| Focal length | 540mm | 660mm |
| Native f/ratio | f/5.4 | f/5.2 |
| Image circle | 40mm | 52mm |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 4.5kg | 9.5kg |
Advantages of Tele Vue NP101is
- Wider field — 540mm vs 660mm focal length
- Lighter (4.5kg vs 9.5kg) — easier to travel with
Advantages of Tele Vue NP127fli
- Tighter framing — 660mm vs 540mm focal length
- 26% more light-gathering aperture
- Larger image circle (52mm) — supports bigger sensors
Best for — Tele Vue NP101is
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
Best for — Tele Vue NP127fli
- Large emission nebulae and star clusters
- Full-frame astro cameras and DSLRs
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
Tele Vue NP127fli — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 3.13° × 2.08°Scale: 1.18"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 2.04° × 1.36°Scale: 1.18"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.98° × 0.98°Scale: 1.18"/px
Tele Vue NP101is — recommended user
Best suited for intermediate imagers building a versatile kit running a portable travel rig.
Tele Vue NP127fli — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.