StellaLyra 6'' f/4 M-LRN Newtonian Reflector with 2'' Dual-Speed Focuser
StellaLyra 6'' f/4 M-LRN Newtonian Reflector with 2'' Dual-Speed FocuserStellaLyra 6'' f/4 M-LRN Newtonian Reflector with 2'' Dual-Speed FocuserStellaLyra 6'' f/4 M-LRN Newtonian Reflector with 2'' Dual-Speed Focuser
StellaLyra 6'' f/4 M-LRN Newtonian Reflector with 2'' Dual-Speed FocuserStellaLyra 6'' f/4 M-LRN Newtonian Reflector with 2'' Dual-Speed FocuserStellaLyra 6'' f/4 M-LRN Newtonian Reflector with 2'' Dual-Speed Focuser

StellaLyra 6" f/4 M-LRN Newtonian Reflector with 2" Dual-Speed Focuser

  (1 Review)
✓ 2 year warranty


12x in stock shipped 1-2 working days

About this product

Model:  stellalyra_6_f4_newt

6" f/4 StellaLyra Imaging Newtonian Reflector Telescope

Designed and manufactured to a very high standard by Guan Sheng Optical (GSO) in Taiwan. 

This compact 6" 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 imaging 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. 

The sturdy dual-speed 2" Linear Bearing (aka Monorail) 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. 

A 2"-1.25" adapter and 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.


  • 153mm (6") optical aperture
  • 600mm 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 Bearing (aka Monorail) 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


Model 6" f/4 Imaging Newtonian
Optical design Newtonian Reflector
Aperture 154mm (6")
Focal ratio f/4
Focal length 600mm
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 183mm / 7.2" At End Caps,  178mm / 7" Across Tube Body
Tube length 530mm / 21"
Tube weight 5.3kg / 11lbs 11oz with Rings / Dovetail / Finder

Customer reviews

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23 June 2022  | 

I ordered the StellaLyra version of this telescope (albeit 10 more expensive) because I preferred the more conventional black tube rings and trim colour rather than the red TS-Photon version. When the telescope arrived I found it had the same colour scheme and finish as the TS-Photon, in fact it appears to be exactly the same telescope (I stand to be corrected). So I paid 10 more for the StellaLyra name on the OTA, slightly annoying! Having said that the telescope is of excellent quality, the focuser is silky smooth, and the overall finish is very good. Collimation was slightly out, requiring only minimal adjustment of the secondary and primary mirrors. Awaiting clear skies to put the scope to the test. I have also fitted the equivalent of Bob's Knobs to make adjustment easier. I have also managed to fit the Skywatcher Autofocuser.

To fit the autofocuser you will need to use the larger of the two fixing brackets that come with the focuser. The 4 screw holes need to be "shifted" 0.5mm outwards along the length of the bracket, and 2.5mm inwards across the bracket. I used a small round needle file to do this although it took some time! (I found the new hole was too close to the existing hole for me to use a drill - you may have better luck) The centre hole needs to be re-drilled to 8mm diameter to take the tensioner screw. You will also need to replace the 4 screws holding the focuser with M3 X 25mm black stainless screws which I purchased from Accu on the Internet. Next remove the large focuser knob (not the slow motion one) by undoing the grub screw (there is a key that fits this grub screw provided with the autofocuser). You will find the spindle it slightly too large to fit the motor connector. The hole in the connector needs to be drilled with a 4.5mm drill, which then makes it slightly too large. To make a tight fit I wrapped a few turns of insulating tape around the spindle, and it fitted fine. Tighten the spindle grub screw. You will now find their is a gap of about 6mm between the focuser bracket and the bracket that holds the motor. This can easily be padded out using washers or in my case some M6 nuts. That's it, you have a motorised focuser. I found that the 9volt battery does struggle a bit to move the focuser, but it does work. A better option is to purchase the excellent value 4Tronix Focus RF from FLO, which then enables you to use a 12volt supply as well as remote working. Please note the above changes will undoubtedly void your warranty. The instructions are offered in good faith, but I am not responsible for the outcome. All I can say is that this has worked for me.


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