About this product
Model: stellalyra_10_f4_newt
Part Number: GS800
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 a 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. 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.
An adapter for 2" & 1.25" eyepieces and a 35mm focus extender are included for visual astronomy.
It is supplied with metal tube-rings and a Vixen-style dovetail mounting plate.
Note: For astrophotography, a coma corrector is required for optimum results.
Mount shown in the photos is 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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