telescopecomparison · 2-way
TS-Optics PHOTOLINE 130 f/7 APO vs TS-Optics UNC 254 f/4 Newtonian Astrograph
TS-Optics
PHOTOLINE 130 f/7 APO
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
TS-Optics
UNC 254 f/4 Newtonian Astrograph
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
Key differences
-10% focal length
-49% aperture
Slower by 3.0 f-stops
Specifications
| Specification | TS-Optics PHOTOLINE 130 f/7 APO | TS-Optics UNC 254 f/4 Newtonian Astrograph |
|---|---|---|
| Optics | ||
| Type | refractor | newtonian |
| Optical design | Apo triplet FPL-53 | Newtonian astrograph |
| Aperture | 130mm | 254mm |
| Focal length | 910mm | 1016mm |
| Native f/ratio | f/7.0 | f/4.0 |
| Image circle | 52mm | — |
| Full-frame support | Yes | Yes |
| Physical | ||
| Weight | 8.3kg | 14.0kg |
Advantages of TS-Optics PHOTOLINE 130 f/7 APO
- Wider field — 910mm vs 1016mm focal length
- Larger image circle (52mm) — supports bigger sensors
- Lighter (8.3kg vs 14kg) — easier to travel with
Advantages of TS-Optics UNC 254 f/4 Newtonian Astrograph
- Tighter framing — 1016mm vs 910mm focal length
- 95% more light-gathering aperture
- Faster optics at f/4 vs f/7
Best for — TS-Optics PHOTOLINE 130 f/7 APO
- Medium-sized galaxies and planetary nebulae
- Full-frame astro cameras and DSLRs
Best for — TS-Optics UNC 254 f/4 Newtonian Astrograph
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
TS-Optics PHOTOLINE 130 f/7 APO — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.27° × 1.51°Scale: 0.85"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.48° × 0.99°Scale: 0.85"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.71° × 0.71°Scale: 0.85"/px
TS-Optics UNC 254 f/4 Newtonian Astrograph — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.03° × 1.35°Scale: 0.76"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.33° × 0.89°Scale: 0.76"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.64° × 0.64°Scale: 0.76"/px
TS-Optics PHOTOLINE 130 f/7 APO — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
TS-Optics UNC 254 f/4 Newtonian Astrograph — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.