Sharpstar SCA310 f/3.8 Aspherical Cassegrain with Integrated Field Flattener
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- The large 310 mm aperture makes it exceptional for deep-sky targets.
- A coma corrector is integrated at the rear of the lens tube, including 1 piece of ED glass.
- With a fast f/3.8 focal ratio you will get brighter images with shorter exposure times needed.
- See sharp, round stars across the frame with the high-precision parabolic primary mirror.
- Experience outstanding thermal stability thanks to the fused-silica secondary mirror.
- Over 95% reflectivity for maximum light efficiency with the enhanced aluminum coatings.
- Long 1,178 mm focal length in a portable, easy-to-handle size.
Sharpstar SCA310 Cassegrain Reflector: Capture Nebulae Like Never Before!
The Sharpstar SCA310 is a powerful 310 mm Cassegrain reflector built for astrophotographers who want maximum light-gathering capability in a surprisingly compact form! Featuring a fast f/3.8 focal ratio, delivering a wide imaging field and allowing shorter exposure times with higher productivity when capturing faint nebulae, galaxies, and fine deep-sky detail. At the heart of the SCA310 is a high-precision parabolic primary mirror, designed to eliminate spherical aberration and produce sharp, round stars across the frame. The fused-silica spherical secondary mirror offers excellent thermal stability, helping maintain focus as temperatures change throughout the night. By fitting a long focal length into a shorter, more compact tube, this design delivers high performance while remaining easier to transport and set up!
SCA310 Standout Features
Built-In Cooling Fans
The SCA310 also has three efficient cooling fans at the rear. The fans can be activated before observation to cool the primary mirror, accelerating thermal equilibrium and significantly enhancing observing sessions and the overall user experience! Choose the SCA310 to begin an efficient, stable, and deeply rewarding journey into deep-space exploration.
Faster for Bright Images
With the fast f/3.8 focal ratio you will see noticably brighter images in half the time! Check out this example photo of IC405 provided by Sharpstar, using the SCA310 OTA and ZWO ASI461MM-Pro astronomy camera.
Material made to Withstand
The lens tube uses a lightweight and robust carbon fiber material, not only reducing overall weight, but this material also has excellent structural stability and temperature adaptability! Incorporating flexible carbon fiber prevents focus shift caused by thermal expansion, and contraction, ensuring consistent imaging performance all night.
Optical Advantage
A 3‑inch triplet coma corrector is built into the rear of the SCA310 lens tube, featuring a piece of ED glass that effectively corrects field curvature and coma, delivering sharp, round stars across the entire frame. The SCA310 is optimized for medium-format and full-frame sensors, providing nearly 100% illumination and a flat, even image from edge to edge. Its carefully engineered optical structure requires no additional back-focus calculations, allowing for quick, effortless focusing and making the imaging process simpler and more enjoyable!
Accessory Ready, and Mount Compatible
The top is equipped with a hollow handle for easy handling; the multi-hole slotted design facilitates the installation of various expansion accessories. The bottom is equipped with a 405 mm (15.94 in) long Losmandy-style dovetail plate, compatible with most mainstream equatorial mounts. Constructed using full CNC processing, the thickened and widened design ensures stable and reliable installation.
Focused on Stability
The 3.5-inch high-rigidity rack-and-pinion focuser offers an upgraded 28 mm focusing travel for a wider adjustment range. Its dual-speed 1:10 fine-focus knob ensures precise control, while the enhanced load capacity keeps it stable and smooth even with heavier imaging setups.
A front-mounted 360° rotator prevents cable wrap during use, and the rear includes multiple threaded adapters (M68/M54/M48) for seamless compatibility with a variety of imaging equipment. The M48 adapter also features a built-in 2-inch filter thread, allowing filters to be attached directly for effortless imaging.
Optical Path Diagram
This diagram shows how light travels through the telescope’s mirrors and corrector, illustrating the folded optical path that delivers a long focal length in a compact tube while maintaining sharp, high-quality images across the field.
Relative Illumination
This diagram shows how evenly light is distributed across the telescope’s field of view. It illustrates how the brightness gradually changes from the center of the image to the edges, helping users understand vignetting and how much of the field receives optimal illumination. A higher relative illumination across the frame means brighter, more uniform images, especially important when using large sensors or full-frame cameras.
Spot Diagram
A Spot Diagram illustrates how a telescope focuses light from a point source, like a star, onto the image plane. Each “spot” shows the spread of light at different points across the field of view. Smaller, tighter spots indicate sharper optics with minimal aberrations, while larger or distorted spots reveal areas where stars may appear blurred. This diagram helps evaluate the telescope’s optical performance and image quality across the entire frame.
Mechanical Diagrams
Specifications
- Telescope type: Cassegrain reflector
- Aperture: 310 mm
- Focal length: 1,178 mm
- Image circle: 55 mm (Medium format)
- Tube material: Carbon fiber
- Corrector type: Triplet (including one ED glass)
- Primary mirror type: Aspherical
- Primary mirror material: Similar to Pyrex
- Secondary mirror material: Fused silica
- Secondary mirror: 184 mm (7.2 in)
- Lens tube outer diameter: 378 mm (14.9 in)
- Lens tube total length: 721 mm (28.4 in)
- Gross weight: 23.5 kg (51.8lb)
- Resolution: 0.37
- Rear-end thread type: M48 (with M48x0.75 filter thread) /M54/M68 adapters
- Rear-end connection distance: Supports 38-66 mm (1.5-2.6 in) range
Other Information
- Country of Manufacture: China
Sharpstar SCA310 Cassegrain Reflector: Capture Nebulae Like Never Before!
The Sharpstar SCA310 is a powerful 310 mm Cassegrain reflector built for astrophotographers who want maximum light-gathering capability in a surprisingly compact form! Featuring a fast f/3.8 focal ratio, delivering a wide imaging field and allowing shorter exposure times with higher productivity when capturing faint nebulae, galaxies, and fine deep-sky detail. At the heart of the SCA310 is a high-precision parabolic primary mirror, designed to eliminate spherical aberration and produce sharp, round stars across the frame. The fused-silica spherical secondary mirror offers excellent thermal stability, helping maintain focus as temperatures change throughout the night. By fitting a long focal length into a shorter, more compact tube, this design delivers high performance while remaining easier to transport and set up!
SCA310 Standout Features
Built-In Cooling Fans
The SCA310 also has three efficient cooling fans at the rear. The fans can be activated before observation to cool the primary mirror, accelerating thermal equilibrium and significantly enhancing observing sessions and the overall user experience! Choose the SCA310 to begin an efficient, stable, and deeply rewarding journey into deep-space exploration.
Faster for Bright Images
With the fast f/3.8 focal ratio you will see noticably brighter images in half the time! Check out this example photo of IC405 provided by Sharpstar, using the SCA310 OTA and ZWO ASI461MM-Pro astronomy camera.
Material made to Withstand
The lens tube uses a lightweight and robust carbon fiber material, not only reducing overall weight, but this material also has excellent structural stability and temperature adaptability! Incorporating flexible carbon fiber prevents focus shift caused by thermal expansion, and contraction, ensuring consistent imaging performance all night.
Optical Advantage
A 3‑inch triplet coma corrector is built into the rear of the SCA310 lens tube, featuring a piece of ED glass that effectively corrects field curvature and coma, delivering sharp, round stars across the entire frame. The SCA310 is optimized for medium-format and full-frame sensors, providing nearly 100% illumination and a flat, even image from edge to edge. Its carefully engineered optical structure requires no additional back-focus calculations, allowing for quick, effortless focusing and making the imaging process simpler and more enjoyable!
Accessory Ready, and Mount Compatible
The top is equipped with a hollow handle for easy handling; the multi-hole slotted design facilitates the installation of various expansion accessories. The bottom is equipped with a 405 mm (15.94 in) long Losmandy-style dovetail plate, compatible with most mainstream equatorial mounts. Constructed using full CNC processing, the thickened and widened design ensures stable and reliable installation.
Focused on Stability
The 3.5-inch high-rigidity rack-and-pinion focuser offers an upgraded 28 mm focusing travel for a wider adjustment range. Its dual-speed 1:10 fine-focus knob ensures precise control, while the enhanced load capacity keeps it stable and smooth even with heavier imaging setups.
A front-mounted 360° rotator prevents cable wrap during use, and the rear includes multiple threaded adapters (M68/M54/M48) for seamless compatibility with a variety of imaging equipment. The M48 adapter also features a built-in 2-inch filter thread, allowing filters to be attached directly for effortless imaging.
Optical Path Diagram
This diagram shows how light travels through the telescope’s mirrors and corrector, illustrating the folded optical path that delivers a long focal length in a compact tube while maintaining sharp, high-quality images across the field.
Relative Illumination
This diagram shows how evenly light is distributed across the telescope’s field of view. It illustrates how the brightness gradually changes from the center of the image to the edges, helping users understand vignetting and how much of the field receives optimal illumination. A higher relative illumination across the frame means brighter, more uniform images, especially important when using large sensors or full-frame cameras.
Spot Diagram
A Spot Diagram illustrates how a telescope focuses light from a point source, like a star, onto the image plane. Each “spot” shows the spread of light at different points across the field of view. Smaller, tighter spots indicate sharper optics with minimal aberrations, while larger or distorted spots reveal areas where stars may appear blurred. This diagram helps evaluate the telescope’s optical performance and image quality across the entire frame.
Mechanical Diagrams
Specifications
- Telescope type: Cassegrain reflector
- Aperture: 310 mm
- Focal length: 1,178 mm
- Image circle: 55 mm (Medium format)
- Tube material: Carbon fiber
- Corrector type: Triplet (including one ED glass)
- Primary mirror type: Aspherical
- Primary mirror material: Similar to Pyrex
- Secondary mirror material: Fused silica
- Secondary mirror: 184 mm (7.2 in)
- Lens tube outer diameter: 378 mm (14.9 in)
- Lens tube total length: 721 mm (28.4 in)
- Gross weight: 23.5 kg (51.8lb)
- Resolution: 0.37
- Rear-end thread type: M48 (with M48x0.75 filter thread) /M54/M68 adapters
- Rear-end connection distance: Supports 38-66 mm (1.5-2.6 in) range
| Manufacturer | Sharpstar |
|---|---|
| Telescope Focal Length | 1001 - 1250mm |
- The large 310 mm aperture makes it exceptional for deep-sky targets.
- A coma corrector is integrated at the rear of the lens tube, including 1 piece of ED glass.
- With a fast f/3.8 focal ratio you will get brighter images with shorter exposure times needed.
- See sharp, round stars across the frame with the high-precision parabolic primary mirror.
- Experience outstanding thermal stability thanks to the fused-silica secondary mirror.
- Over 95% reflectivity for maximum light efficiency with the enhanced aluminum coatings.
- Long 1,178 mm focal length in a portable, easy-to-handle size.
Sharpstar SCA310 Cassegrain Reflector: Capture Nebulae Like Never Before!
The Sharpstar SCA310 is a powerful 310 mm Cassegrain reflector built for astrophotographers who want maximum light-gathering capability in a surprisingly compact form! Featuring a fast f/3.8 focal ratio, delivering a wide imaging field and allowing shorter exposure times with higher productivity when capturing faint nebulae, galaxies, and fine deep-sky detail. At the heart of the SCA310 is a high-precision parabolic primary mirror, designed to eliminate spherical aberration and produce sharp, round stars across the frame. The fused-silica spherical secondary mirror offers excellent thermal stability, helping maintain focus as temperatures change throughout the night. By fitting a long focal length into a shorter, more compact tube, this design delivers high performance while remaining easier to transport and set up!
SCA310 Standout Features
Built-In Cooling Fans
The SCA310 also has three efficient cooling fans at the rear. The fans can be activated before observation to cool the primary mirror, accelerating thermal equilibrium and significantly enhancing observing sessions and the overall user experience! Choose the SCA310 to begin an efficient, stable, and deeply rewarding journey into deep-space exploration.
Faster for Bright Images
With the fast f/3.8 focal ratio you will see noticably brighter images in half the time! Check out this example photo of IC405 provided by Sharpstar, using the SCA310 OTA and ZWO ASI461MM-Pro astronomy camera.
Material made to Withstand
The lens tube uses a lightweight and robust carbon fiber material, not only reducing overall weight, but this material also has excellent structural stability and temperature adaptability! Incorporating flexible carbon fiber prevents focus shift caused by thermal expansion, and contraction, ensuring consistent imaging performance all night.
Optical Advantage
A 3‑inch triplet coma corrector is built into the rear of the SCA310 lens tube, featuring a piece of ED glass that effectively corrects field curvature and coma, delivering sharp, round stars across the entire frame. The SCA310 is optimized for medium-format and full-frame sensors, providing nearly 100% illumination and a flat, even image from edge to edge. Its carefully engineered optical structure requires no additional back-focus calculations, allowing for quick, effortless focusing and making the imaging process simpler and more enjoyable!
Accessory Ready, and Mount Compatible
The top is equipped with a hollow handle for easy handling; the multi-hole slotted design facilitates the installation of various expansion accessories. The bottom is equipped with a 405 mm (15.94 in) long Losmandy-style dovetail plate, compatible with most mainstream equatorial mounts. Constructed using full CNC processing, the thickened and widened design ensures stable and reliable installation.
Focused on Stability
The 3.5-inch high-rigidity rack-and-pinion focuser offers an upgraded 28 mm focusing travel for a wider adjustment range. Its dual-speed 1:10 fine-focus knob ensures precise control, while the enhanced load capacity keeps it stable and smooth even with heavier imaging setups.
A front-mounted 360° rotator prevents cable wrap during use, and the rear includes multiple threaded adapters (M68/M54/M48) for seamless compatibility with a variety of imaging equipment. The M48 adapter also features a built-in 2-inch filter thread, allowing filters to be attached directly for effortless imaging.
Optical Path Diagram
This diagram shows how light travels through the telescope’s mirrors and corrector, illustrating the folded optical path that delivers a long focal length in a compact tube while maintaining sharp, high-quality images across the field.
Relative Illumination
This diagram shows how evenly light is distributed across the telescope’s field of view. It illustrates how the brightness gradually changes from the center of the image to the edges, helping users understand vignetting and how much of the field receives optimal illumination. A higher relative illumination across the frame means brighter, more uniform images, especially important when using large sensors or full-frame cameras.
Spot Diagram
A Spot Diagram illustrates how a telescope focuses light from a point source, like a star, onto the image plane. Each “spot” shows the spread of light at different points across the field of view. Smaller, tighter spots indicate sharper optics with minimal aberrations, while larger or distorted spots reveal areas where stars may appear blurred. This diagram helps evaluate the telescope’s optical performance and image quality across the entire frame.
Mechanical Diagrams
Specifications
- Telescope type: Cassegrain reflector
- Aperture: 310 mm
- Focal length: 1,178 mm
- Image circle: 55 mm (Medium format)
- Tube material: Carbon fiber
- Corrector type: Triplet (including one ED glass)
- Primary mirror type: Aspherical
- Primary mirror material: Similar to Pyrex
- Secondary mirror material: Fused silica
- Secondary mirror: 184 mm (7.2 in)
- Lens tube outer diameter: 378 mm (14.9 in)
- Lens tube total length: 721 mm (28.4 in)
- Gross weight: 23.5 kg (51.8lb)
- Resolution: 0.37
- Rear-end thread type: M48 (with M48x0.75 filter thread) /M54/M68 adapters
- Rear-end connection distance: Supports 38-66 mm (1.5-2.6 in) range
Other Information
- Country of Manufacture: China
| Manufacturer | Sharpstar |
|---|---|
| Telescope Focal Length | 1001 - 1250mm |
Sharpstar SCA310 f/3.8 Aspherical Cassegrain with Integrated Field Flattener