61EDPHIII

Introduction to the Sharpstar 61EDPHIII

The Sharpstar 61EDPH III is a high-end astrograph combining performance, portability and versatility. Designed for demanding astrophotographers, it lets you explore the sky with precision and finesse, thanks to its apochromatic triplet air design enhanced by two ED glass elements, guaranteeing a notable reduction in chromatic aberrations and exceptional sharpness.

Optical characteristics

• Optical design : Air-operated triplet apochromatic, with two low-dispersion ED glass elements.
• Focal length and focal ratio : 360 mm focal length and f/5.9 focal ratio, ideal for high-quality observation and astrophotography.
• Image circle : Compatible with a 44 mm full-format image circle, perfect for large-format sensors.

Ergonomic design and construction

• Design revisited : Tube manufactured using high-precision CNC processes, with high-quality paint coating.
• Multifunctional handle : Facilitates transport and assembly, and allows the addition of accessories such as a finder base.
• Elegant appearance : Classic red and white color scheme, combining sobriety and professionalism.

Optional full-format reducer and corrector

• Focal reducer :
  • Reduces focal ratio to f/4.4 and focal length to 270 mm.
  • Thread: One side M68 x 1 and the other M48 x 0.75 with integrated thread for 2" filters.
  • 55 mm rear focal point, extendable to 75 mm.
• Full-format corrector :
  • Equipped with M48 x 0.75 thread with 2" filter thread.
  • 81.5 mm rear focal point to correct distortion at the edges of the field.

Technical features and benefits

• Opening : 61 mm
• Focal length : 360 mm
• Focal report : f/5.9
• Limiting visual magnitude : 1.93 arcseconds resolution, guaranteeing fine detail of celestial objects.
• Tube length : 272 mm with retracted sunshade
• Total weight : 1.92 kg (with accessories), for uncompromising portability
• Tube outer diameter : 75 mm, ensuring a comfortable grip.

Accessories included

• Tube ring
• Vixen-style dovetail plate (300 mm)
• Multifunctional handle
• 4-piece photographic adapter (compatible with M86, M68, M54 and M48 with thread for 2" filters)

Conclusion

The Sharpstar 61EDPH III embodies excellence in wide-field astrophotography thanks to its high optical quality and ergonomic design. Its apochromatic optics, robust construction and integrated accessories offer astrophotographers a portable, high-performance solution for capturing the sky with exceptional sharpness and contrast.