Vixen Optics SD115S II f/7.7 Apo Doublet Refractor Telescope - OTA Only
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- 115mm SD apochromatic doublet minimizes chromatic aberration for sharp views
- 890mm Focal Length (f/7.7) is ideal for lunar, planetary, and deep-sky observing and imaging
- Ring-shaped lens spacer eliminates diffraction spikes for cleaner, rounder stars
- Lightweight optical tube with included carry handle, illuminated finderscope, and 1.25" flip mirror diagonal
Vixen Telescope SD115S II Optical Tube Assembly
The successor to the favorably reviewed SD115S, SD115S II has a generous 115mm aperture and long 890mm focal length. You can use the SD115 II for a wide variety of purposes, from visual observation to astrophotography. The Vixen SD115SII features an improved ring-shaped lens spacer that eliminates the diffraction artifacts caused by the three foil spacers used in the previous SD115S model. By removing protrusions from the optical path, the new design produces cleaner, more uniform diffraction patterns, resulting in sharper, beautifully rounded stars!
Please note: Eyepieces in gallery images are not included and for demonstrative purposes only.
SD Glass for Exceptional Color Correction
The Vixen SD115SII features premium FPL53 Super ED (SD) glass, designed to minimize chromatic aberration and deliver sharp, high-contrast images. Unlike conventional optical glass, SD glass reduces the dispersion of different wavelengths of light, bringing colors into nearly the same focal plane for outstanding clarity and minimal color fringing.
The SD115SII provides excellent correction across the visible spectrum, including red (C-ray), yellow (d-ray), green (e-ray), blue (F-ray), and violet (g-ray) wavelengths. Its exceptional correction of short-wavelength violet light further improves image contrast, producing crisp, detailed stars with minimal unwanted color.
Exceptional Correction Across the Visible Spectrum
The SD glass lens delivers exceptional chromatic aberration correction across the visible spectrum, bringing red (C-ray), yellow (d-ray), green (e-ray), blue (F-ray), and violet (g-ray) wavelengths into nearly the same focal plane. Its outstanding correction of short-wavelength violet light further improves image contrast, producing sharper, more detailed stars with minimal color fringing.
Visual Observing & Astrophotography
With a 115 mm aperture and 890 mm focal length, the Vixen SD115SII is ideal for everything from detailed planetary observations to imaging nebulae and star clusters. The included flip mirror diagonal allows quick switching between two eyepieces or between visual observing and astrophotography using a camera and eyepiece. A standard dovetail mounting plate and sturdy metal carry handle make transporting, mounting, and removing the optical tube quick and convenient.
Included 7x50 Finder Scope II w/ Illuminated Crosshairs
The Vixen SD115SII includes a versatile 7x50 Finder Scope II with adjustable red-illuminated crosshairs for easy target alignment in dark conditions. Its built-in dark-field illumination improves visibility without overwhelming your night vision. The removable 1.25" (31.7 mm) eyepiece assembly also allows the finder to double as a guide scope when paired with a compatible CMOS guiding camera (sold separately).
Specifications
- Aperture: 115 mm SD (Super ED) apochromatic doublet, multicoated
- Focal Length: 890 mm
- Focal Ratio: f/7.7
- Resolving Power: 1.01 arcseconds
- Limiting Magnitude: 12.5
- Light-Gathering Power: 270x the unaided eye
- Focuser: Rack-and-pinion with lock knob
- Adapter Threads: M60 and M42 (T-ring compatible)
- Included Finderscope: 7x50 Finder II with dark-field illumination and 7° field of view (CR2032 battery included)
- Included Accessories: Tube rings, WT dovetail mounting plate, metal carry handle
- Optical Tube Dimensions: 125 mm (4.92") diameter × 930 mm (36.61") length
- Weight: 6.3 kg (13.89 lb) with accessories; 4.4 kg (9.70 lb) optical tube only
When used in conjunction with the SD Reducer HD Kit (sold separately) and the SD Flattener HD Kit (sold separately), it enables high-quality astrophotography with full-frame SLR cameras/CMOS cameras.
Other Information
- Country of Manufacture: Japan
Vixen Telescope SD115S II Optical Tube Assembly
The successor to the favorably reviewed SD115S, SD115S II has a generous 115mm aperture and long 890mm focal length. You can use the SD115 II for a wide variety of purposes, from visual observation to astrophotography. The Vixen SD115SII features an improved ring-shaped lens spacer that eliminates the diffraction artifacts caused by the three foil spacers used in the previous SD115S model. By removing protrusions from the optical path, the new design produces cleaner, more uniform diffraction patterns, resulting in sharper, beautifully rounded stars!
Please note: Eyepieces in gallery images are not included and for demonstrative purposes only.
SD Glass for Exceptional Color Correction
The Vixen SD115SII features premium FPL53 Super ED (SD) glass, designed to minimize chromatic aberration and deliver sharp, high-contrast images. Unlike conventional optical glass, SD glass reduces the dispersion of different wavelengths of light, bringing colors into nearly the same focal plane for outstanding clarity and minimal color fringing.
The SD115SII provides excellent correction across the visible spectrum, including red (C-ray), yellow (d-ray), green (e-ray), blue (F-ray), and violet (g-ray) wavelengths. Its exceptional correction of short-wavelength violet light further improves image contrast, producing crisp, detailed stars with minimal unwanted color.
Exceptional Correction Across the Visible Spectrum
The SD glass lens delivers exceptional chromatic aberration correction across the visible spectrum, bringing red (C-ray), yellow (d-ray), green (e-ray), blue (F-ray), and violet (g-ray) wavelengths into nearly the same focal plane. Its outstanding correction of short-wavelength violet light further improves image contrast, producing sharper, more detailed stars with minimal color fringing.
Visual Observing & Astrophotography
With a 115 mm aperture and 890 mm focal length, the Vixen SD115SII is ideal for everything from detailed planetary observations to imaging nebulae and star clusters. The included flip mirror diagonal allows quick switching between two eyepieces or between visual observing and astrophotography using a camera and eyepiece. A standard dovetail mounting plate and sturdy metal carry handle make transporting, mounting, and removing the optical tube quick and convenient.
Included 7x50 Finder Scope II w/ Illuminated Crosshairs
The Vixen SD115SII includes a versatile 7x50 Finder Scope II with adjustable red-illuminated crosshairs for easy target alignment in dark conditions. Its built-in dark-field illumination improves visibility without overwhelming your night vision. The removable 1.25" (31.7 mm) eyepiece assembly also allows the finder to double as a guide scope when paired with a compatible CMOS guiding camera (sold separately).
Specifications
- Aperture: 115 mm SD (Super ED) apochromatic doublet, multicoated
- Focal Length: 890 mm
- Focal Ratio: f/7.7
- Resolving Power: 1.01 arcseconds
- Limiting Magnitude: 12.5
- Light-Gathering Power: 270x the unaided eye
- Focuser: Rack-and-pinion with lock knob
- Adapter Threads: M60 and M42 (T-ring compatible)
- Included Finderscope: 7x50 Finder II with dark-field illumination and 7° field of view (CR2032 battery included)
- Included Accessories: Tube rings, WT dovetail mounting plate, metal carry handle
- Optical Tube Dimensions: 125 mm (4.92") diameter × 930 mm (36.61") length
- Weight: 6.3 kg (13.89 lb) with accessories; 4.4 kg (9.70 lb) optical tube only
When used in conjunction with the SD Reducer HD Kit (sold separately) and the SD Flattener HD Kit (sold separately), it enables high-quality astrophotography with full-frame SLR cameras/CMOS cameras.
| Manufacturer | Vixen Optics |
|---|---|
| Telescope Focal Length | 801 - 900mm |
- 1x SD115SII Telescope Tube
- 1x 1.25" Flip mirror
- 1x Attachment plate (WT)
- 1x Darkfield viewfinder II 7x 50mm
- 1x 50mm XY Finder Mount II
- 1x Operating instructions
- 1x Warranty
- 115mm SD apochromatic doublet minimizes chromatic aberration for sharp views
- 890mm Focal Length (f/7.7) is ideal for lunar, planetary, and deep-sky observing and imaging
- Ring-shaped lens spacer eliminates diffraction spikes for cleaner, rounder stars
- Lightweight optical tube with included carry handle, illuminated finderscope, and 1.25" flip mirror diagonal
Vixen Telescope SD115S II Optical Tube Assembly
The successor to the favorably reviewed SD115S, SD115S II has a generous 115mm aperture and long 890mm focal length. You can use the SD115 II for a wide variety of purposes, from visual observation to astrophotography. The Vixen SD115SII features an improved ring-shaped lens spacer that eliminates the diffraction artifacts caused by the three foil spacers used in the previous SD115S model. By removing protrusions from the optical path, the new design produces cleaner, more uniform diffraction patterns, resulting in sharper, beautifully rounded stars!
Please note: Eyepieces in gallery images are not included and for demonstrative purposes only.
SD Glass for Exceptional Color Correction
The Vixen SD115SII features premium FPL53 Super ED (SD) glass, designed to minimize chromatic aberration and deliver sharp, high-contrast images. Unlike conventional optical glass, SD glass reduces the dispersion of different wavelengths of light, bringing colors into nearly the same focal plane for outstanding clarity and minimal color fringing.
The SD115SII provides excellent correction across the visible spectrum, including red (C-ray), yellow (d-ray), green (e-ray), blue (F-ray), and violet (g-ray) wavelengths. Its exceptional correction of short-wavelength violet light further improves image contrast, producing crisp, detailed stars with minimal unwanted color.
Exceptional Correction Across the Visible Spectrum
The SD glass lens delivers exceptional chromatic aberration correction across the visible spectrum, bringing red (C-ray), yellow (d-ray), green (e-ray), blue (F-ray), and violet (g-ray) wavelengths into nearly the same focal plane. Its outstanding correction of short-wavelength violet light further improves image contrast, producing sharper, more detailed stars with minimal color fringing.
Visual Observing & Astrophotography
With a 115 mm aperture and 890 mm focal length, the Vixen SD115SII is ideal for everything from detailed planetary observations to imaging nebulae and star clusters. The included flip mirror diagonal allows quick switching between two eyepieces or between visual observing and astrophotography using a camera and eyepiece. A standard dovetail mounting plate and sturdy metal carry handle make transporting, mounting, and removing the optical tube quick and convenient.
Included 7x50 Finder Scope II w/ Illuminated Crosshairs
The Vixen SD115SII includes a versatile 7x50 Finder Scope II with adjustable red-illuminated crosshairs for easy target alignment in dark conditions. Its built-in dark-field illumination improves visibility without overwhelming your night vision. The removable 1.25" (31.7 mm) eyepiece assembly also allows the finder to double as a guide scope when paired with a compatible CMOS guiding camera (sold separately).
Specifications
- Aperture: 115 mm SD (Super ED) apochromatic doublet, multicoated
- Focal Length: 890 mm
- Focal Ratio: f/7.7
- Resolving Power: 1.01 arcseconds
- Limiting Magnitude: 12.5
- Light-Gathering Power: 270x the unaided eye
- Focuser: Rack-and-pinion with lock knob
- Adapter Threads: M60 and M42 (T-ring compatible)
- Included Finderscope: 7x50 Finder II with dark-field illumination and 7° field of view (CR2032 battery included)
- Included Accessories: Tube rings, WT dovetail mounting plate, metal carry handle
- Optical Tube Dimensions: 125 mm (4.92") diameter × 930 mm (36.61") length
- Weight: 6.3 kg (13.89 lb) with accessories; 4.4 kg (9.70 lb) optical tube only
When used in conjunction with the SD Reducer HD Kit (sold separately) and the SD Flattener HD Kit (sold separately), it enables high-quality astrophotography with full-frame SLR cameras/CMOS cameras.
Other Information
- Country of Manufacture: Japan
| Manufacturer | Vixen Optics |
|---|---|
| Telescope Focal Length | 801 - 900mm |
- 1x SD115SII Telescope Tube
- 1x 1.25" Flip mirror
- 1x Attachment plate (WT)
- 1x Darkfield viewfinder II 7x 50mm
- 1x 50mm XY Finder Mount II
- 1x Operating instructions
- 1x Warranty