#Japan #astrophotography #Shinjuku #SHARPSTAR #SCA310

The SHARPSTAR SCA310: A Cutting-Edge Telescope for Astrophotography

The realm of astrophotography is set to expand with the introduction of the SHARPSTAR SCA310, crafted by Saitron Japan and set to launch on July 3, 2026. This telescope boasts an impressive aperture of 310mm, a focal length of 1178mm, and an aperture ratio of F3.8, making it an ideal tool for capturing the mesmerizing beauty of the night sky.

Superior Optical Design

The SCA310 features a Cassegrain optical system, incorporating a high-precision aspheric primary mirror alongside a spherical secondary mirror made from temperature-stable quartz glass. These components work in tandem with a built-in corrective optical assembly composed of three groups and three elements, which includes one extra-low dispersion (ED) glass lens. This unique combination allows for an expansive 55mm image circle, ensuring the telescope is adept for deep-sky imaging using large sensors from full-frame to medium formats.

Photographers will appreciate how the SCA310's high light-gathering power coupled with its fast aperture enables efficient capture of faint celestial objects. Long exposure times, typically required for illuminating diffused nebulae, are diminished thanks to its bright optical design, thus allowing users to pull out intricate details and colors of the universe with relative ease.

An Engineered Marvel for Deep Sky Photography

The telescope's optical system is designed to minimize spherical aberration effectively, which results in sharp star images across the entire field of view. The secondary mirror's reflective coating, with over 95% efficiency, maximizes light utilization, further enhancing image quality. Additionally, the built-in three-element correction lens system is constructed to effectively correct for field curvature and other aberrations, resulting in sharp star images from the center to the periphery.

The SCA310 offers compatibility with various camera models via its M68, M54, and M48 adapters, the latter of which includes a filter thread for easy integration into different astrophotography setups. This versatility allows users to select the ideal configuration for their shooting preferences.

Constructed for Stability and Ease of Use

Built from lightweight yet high-rigidity carbon fiber, the telescope’s structure mitigates temperature-induced expansions and contractions, ensuring consistent focus. The SCA310 also features a multifunctional handlebar, allowing for convenient transport and versatility in attaching various guides or accessories. The bottom of the telescope includes a broad dovetail bar spanning 405mm, which fits many commercially available equatorial mounts, promoting stability during use.

Incorporating three exhaust fans in the rear, the SCA310 enables rapid cooling of the primary mirror before observing sessions, drastically reducing the acclimatization time needed. The fans operate on a 12V power supply, ensuring you're ready for celestial events promptly.

Precision in Focusing and Composition

The robust rack-and-pinion focuser system, with a 30mm focusing stroke, ensures users can achieve precise focus, even when multiple accessories are attached. A gear-reduced fine focus knob allows for meticulous adjustments. Furthermore, a 360-degree rotation mechanism at the front of the focuser allows users to manage cable wraps while composing their shots accurately.

Users can easily adjust the optical axes of both mirrors thanks to the included collimation screws, with the spherical secondary mirror further simplifying this process. Compatibility extends to various electric focusers, including those from ZWO, enhancing potential for automation in astrophotography workflows.

Key Specifications

• - Aperture: 310mm
• - Focal Length: 1178mm
• - Aperture Ratio: F3.8
• - Optical System: Cassegrain reflector (aspheric primary, spherical secondary)
• - Image Circle: 55mm (supports full-frame and medium format sensors)
• - Coating: Enhanced aluminum coating (reflectivity over 95%)
• - Correction Lens: Three groups, three elements (one ED glass)
• - Material: Carbon fiber, external diameter 378mm
• - Weight: 23.5 kg
• - Adapters: M48, M54, M68
• - Cooling Mechanism: Three built-in exhaust fans

Pricing and Availability

The SHARPSTAR SCA310 is expected to retail around 1,200,000 yen (including tax). As a made-to-order product, potential buyers are advised to allow for longer delivery times. For more information regarding this exciting addition to the world of astrophotography, interested parties can contact Saitron Japan.

In summary, the SCA310 is designed not just to meet the demands of amateur and professional astrophotographers alike but to elevate their shooting experience significantly. With its innovative features and robust construction, the SCA310 stands poised to become a favorite among those who seek to capture the cosmos in all its glory.