The ZWO 1.25-Inch Helical Focuser is a handy adapter designed for ZWO mini guide cameras and other optical cameras requiring exact focus. Featuring a non-rotating design, this focuser ensures that you won’t need to recalibrate your autoguiding system when adjusting focus, maintaining accuracy and stability in your observations.

This focuser is equipped with a male M42 thread at the top, suitable for M42 threaded guide cameras from ZWO or from other industry brands. The bottom of the focuser has M42 female threads for secure attachment to an off-axis guider (OAG). It offers approximately 6mm of adjustment with a remarkable accuracy of 0.1mm, allowing for precise focus control.

Constructed from aerospace aluminium alloy and manufactured using precision CNC machining technology, the focuser is both robust and lightweight, weighing between 80-100g. The frosted and anodised housing ensures durability and a sleek finish, while the anti-skid brass screw provides a secure grip.

With a minimum height of 48.5mm and a 1.25-inch pass-through diameter, this focuser is also tilt-free, preserving focus across the entire field of view. It is an ideal match for ZWO’s OAG and Mini Series guide cameras but can also be utilised in other applications where precise focusing is essential.

About ZWO Optical: Astrophotography has never been easier

Established in 2011, ZWO Optical is a fast-growing global astroimaging camera powerhouse based in Suzhou China.
They focus on building and innovating ground-breaking CMOS cameras such as the iconic ZWO ASI120MM Monochrome CMOS camera (the first-ever planetary CMOS camera to beat a CCD in the early 2010s).
ZWO continues to pioneer new astrophotography technology with revolutionary features to capture exceptional quality of images of space that will last you a lifetime.

Today, ZWO cameras are recognised by every passionate astrophotographer and are available in over 25 countries internationally.

Product Code: HF1.25