StellaLyra 2'' 4-element Photo-Visual Coma Corrector for Newtonian Telescopes
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StellaLyra 2'' 4-element Photo-Visual Coma Corrector for Newtonian TelescopesStellaLyra 2'' 4-element Photo-Visual Coma Corrector for Newtonian TelescopesStellaLyra 2'' 4-element Photo-Visual Coma Corrector for Newtonian Telescopes

StellaLyra 2" 4-element Photo-Visual Coma Corrector for Newtonian Telescopes

£99.00
  (1 Review)
✓ 2 year warranty

  

27x in stock shipped 1-2 working days

About this product

Model:  stellalyra_f4_cc

High-quality 2" 4-element Photo-Visual Coma Corrector

Designed and manufactured by Guan Sheng Optical (GSO) in Taiwan. 

Reduces coma and field curvature.

Designed for fast Newtonian telescopes with focal ratios f/3-f/6 but optimised for around f/4.

This modular design includes a 2" eyepiece holder with two large thumbscrews and a non-marring brass compression ring (won't mark your eyepiece barrels). 

For astrophotography, the eyepiece holder can be removed to reveal an M48 thread for connecting a camera and includes an M48-M42/T2 adapter.

Increases magnification slightly (approximately 1.1x) and has a back focus requirement of approx 75mm.  So, for example, when using a Canon/Nikon DSLR camera with 55mm back focus (including a standard thickness M48 ring to fit the camera), you will need an approx 20mm long spacer between the corrector and M48 ring. 

FEATURES

  • Smooth 2" nosepiece with M48x0.75 / 2" filter thread
  • Designed for f/4 Newtonian Telescopes but works well around f/3-f/6
  • Fully multi-coated 4-element, 2-group optics
  • Reduced coma and field curvature
  • 1.1x Magnification
  • 75mm ± 5mm back focus
  • 44mm clear aperture
  • Includes an M48 to M42/T2 Adapter
  • Undo the 2" eyepiece holder to reveal an M48 thread

What's in the box

  • 2" Coma Corrector
  • M48 to M42/T2 Adapter
  • Lens Caps

Specifications

Barrel Size 2" / 50.8mm
Magnification 1.1x
Focal Ratio f/3-f/6
Optics Fully multicoated. 4-elements, 2-groups
Weight 335g complete
220g without 2" eyepiece holder
Clear Aperture 44mm
Back Focus 75mm ± 5mm
Filter Thread M48 x 0.75 / 2" filter thread
Camera Thread

M48 x 0.75 with 2" eyepiece holder removed

M42/T2 with included M48-M42 adapter

Country of Manufacture Taiwan

Customer reviews

Average Rating (1 Review):  
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StellaLyra 2" 4-element Photo-Visual Coma Corrector
03 April 2023  | 

Blown away with the effect this coma corrector has on my favourite Maxvision 24mm 82degree eyepiece through my 12 f/4.9 dob; it simply cleans up the coma and tightens up the stars perfectly; I used 1 x 12mm & 1 x 7mm extension ring making 19 total, I can't see myself using the Morpheus 17.5 without it, as switched from the 24mm Maxvision back to the Morpheus 17.5 and found it to need that last 5% improved. After my focuser upgrade, this is the best addition to my Dobsonian; very impressed.

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