About this product
Model: stellalyra_10_f4_newt
Incredible value 10" f/4 StellaLyra Imaging Newtonian Reflector Telescope
Designed and manufactured to a very high standard by Guan Sheng Optical (GSO) in Taiwan.
This 10" StellaLyra reflector with fast f/4 focal ratio is an excellent choice for deep-sky imaging with a dedicated astronomy CMOS/CCD camera or DSLR.
All StellaLyra newtonian telescopes feature GSO aluminised parabolic primary mirrors with minimum 93% reflectivity and a silicon-dioxide protective overcoat to ensure the surface remains bright for years to come. Chunky collimation knobs enable easy collimation adjustment, without tools, and an integrated fan reduces cooling time.
The sturdy dual-speed 3" Linear Crayford focuser has enough tension for most small / medium size imaging payloads and provides precise, smooth focus adjustments.
A nicely made 8x50 straight finderscope with fully multicoated optics is included and can be adapted (adapter available separately) for use as a convenient guide-scope.
For visual astronomy an adapter for 2" & 1.25" eyepieces and a 35mm focus extender is included.
Supplied with metal tube-rings and Vixen-style dovetail mounting plate.
Note: For astrophotography a coma corrector is required for optimum results.
Mount shown in photos not included 
FEATURES
- 254mm (10") optical aperture
- 1016mm focal length
- f/4 focal ratio
- BK7 primary and secondary mirrors
- Primary mirror: Parabolic with enhanced Al coating for 93%+ reflectivity
- Secondary mirror: 70mm Minor Axis with enhanced Al coating for 93%+ reflectivity
- Adjustable primary and secondary collimation
- 2" dual-speed Linear Crayford focuser
- Vixen/Synta Style Finder scope base
- 8x50 Straight through finder and bracket
- Vixen-Style 44mm Dovetail
Telescope Field of View Simulator
What's in the box
- Telescope OTA
- 8x50 Finderscope
- 35mm 2" Focus Extension tube
- 2" to 1.25" Adapter
- Tube Rings
- Vixen-style Dovetail
- Cooling Fan & Battery Holder
Specifications
| Model | 10" f/4 Imaging Newtonian |
| Optical design | Newtonian Reflector |
| Aperture | 254mm (6") |
| Focal ratio | f/4 |
| Focal length | 1016mm |
| Primary mirror | BK7 Parabolic primary mirror, minimum 93% reflectivity |
| Mirror coatings | Aluminum and silicone dioxide (SiO2) |
| Secondary mirror | Minimum 93% reflectivity |
| Focuser | 2" dual-speed Crayford |
| Finderscope | Straight Through 8x50 |
| Accessories | 35mm 2" extension tube & 2" to 1.25" eyepiece adaptern |
| Tube outside diameter | 307mm / 12.1" At End Caps, 303mm / 12" Across Tube Body |
| Tube length | 980mm / 38.6" |
| Tube weight | 14.8kg / 32lbs 10oz with Rings / Dovetail / Finder |
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