Sharpstar Z4 100mm f/5.5 Sextuplet APO Astrograph OTA

Product Overview

The Sharpstar Z4 100mm f/5.5 Sextuplet APO Astrograph is designed for astrophotographers who demand precision, portability, and superb optical performance. With a fully corrected field, this fast astrograph eliminates the need for a separate field flattener, delivering sharp, pinpoint stars right to the edge of your frame.

Lightweight and easy to carry and assemble, the Sharpstar Z4 is equally at home on a portable mount or a permanent observatory setup.

Key Features

• 100mm Sextuplet APO design – six optical elements for exceptional colour correction.
• f/5.5 fast focal ratio – gather more light in less time for deep-sky astrophotography.
• 300mm Vixen-style dovetail plate – secure and reliable mounting for most equatorial mounts.
• Precision focuser with smooth focusing and angle adjustment for accurate framing and fine focus control.
• Full-frame imaging circle – perfect for modern CMOS and DSLR cameras.
• Compact and portable – ideal for travel or field use.

Benefits for Astrophotographers

• Capture stunning wide-field nebulae and galaxies with excellent star sharpness.
• Save time with a built-in flattener — no extra accessories required.
• Lightweight OTA ensures easy setup, focusing, and framing even on mid-range mounts.
• Compatible with standard accessories thanks to its Vixen-style dovetail plate.

What’s Included

• Sharpstar Z4 100mm f/5.5 Sextuplet APO Astrograph OTA
• CNC-machined tube rings and handle
• 300mm Vixen-style dovetail plate
• Carry case for transport and storage

Specifications

• Aperture: 100mm
• Focal Length: 550mm
• Focal Ratio: f/5.5
• Optical Design: Sextuplet APO (6 elements)
• Back Focus: 55mm
• Weight: Approx. 5.5kg

Why Choose the Sharpstar Z4?

Whether you’re imaging from a dark-sky site or your backyard, the Sharpstar Z4 delivers professional-grade results with ease. Its optical quality, portability, and versatility make it one of the best choices for astrophotographers seeking wide-field precision in a compact design.