Focuser & Accessories

The rack and pinion focuser is suitable for do-it-yourself construction or improvement of an 8" Newtonian telescope and also accepts correctors with 3" diameter.

• Suitable for telescope tubes with 230mm to 250mm diameter
• Including 360° rotation and tilting possibility
• 2" connection and auxiliary thread M82x1 (female) for adapting large correctors for astrophotography
• Micro-reduction for precise focusing
• The bearing of the extension tube is decoupled from the adjustment via gear drive (rack-and-pinion)

The rack and pinion focuser is suitable for do-it-yourself construction or improvement of a 10" Newtonian and also accepts correctors with 3" diameter.

• Suitable for telescope tubes with 230mm to 250mm diameter
• Including 360° rotation and tilting possibility
• 2" connection and auxiliary thread M82x1 (female) for adapting large correctors for astrophotography
• Micro-reduction for precise focusing
• The bearing of the extension tube is decoupled from the adjustment via gear drive (rack-and-pinion)

• Telescope connection: female M117x1 thread with 360° rotation
• Can also be attached to refractors via special adapter
• Connection on the eyepiece side is 2" and 1.25"
• M82x1 male thread, M77x1 female thread, M74x1 male thread and M69x1 female thread for screw adaptations
• Drawtube travel is 50 mm
• Bearing via stainless steel rail with ball bearings
• Adjustment via toothed rack - rack-and-pinion principle
• Suitable for EAF motorized focus without additional adapter

• New: Power supply via USB - also works via computer or ASIAIR
• Can easily move up to 5 kg
• ASCOM, ASIAIR and INDI are supported
• ZWO EAF works with every capture software
• Control focus via smartphone or tablet
• With versatile connecting plate for all common focusers, for example from TS-Optics, Astro Tech, Feather Touch ...
• Standard version with motor focus, flexible busbar and USB2.0 cable which is also used for power supply
• If you need a hand controller and a temperature sensor, you should consider the ZWO-EAF-A.

Adapt the EAF motorized focus to Starlight Feather Touch True 3.2 focusers with this adapter

• Fits all EAF motorized focusers from ZWO
• Suitable for Starlight FTF True 3.2” focusers
• Manufactured in 3D printing
• Resistant to UV and temperatures up to approx. 80° C

Adapt the EAF motorized focus to Starlight Feather Touch True 3.5 focusers with this adapter

• Fits all EAF motorized focusers from ZWO
• Suitable for Starlight FTF True 3.5” focusers
• Manufactured in 3D printing
• Resistant to UV and temperatures up to approx. 80° C

Esatto by Primaluce is a motorized focuser of the latest generation for the best possible results in astrophotography.

• Load capacity up to 5 kg without bending due to 8 specially developed ball bearings
• Short design with only 67 mm overall height
• 15 mm focus path with an incredible resolution of only 0.04 micron per step
• Adapters for connection to various telescopes and camera adapters are available
• Remote control by EAGLE or any Windows computer with control software (ASCOM compatible)
• USB connection to your computer (cable included)
• Remote control with WIFI possible from any smartphone, tablet or computer - due to the ESTATTO Virtual-HandPad app also for visual use

ESATTO 3" is the robotic microfocuser perfect for many telescopes like large refractors, Ritchey-Chrétiens or Cassegrains, specifically designed for astrophotography.

• Crayford style focuser with 28 ball bearings
• Specially designed for very high load capacity (up to 8 kg) with no flexure
• Low profile design with only 77 mm thickness
• 25 mm focuser travel with an incredible resolution of 0.04 microns per step!
• Special adapters available to easily connect to many different telescopes
• Remotely controlled from EAGLE or any Windows computer, with dedicated control software or ASCOM drivers
• USB-C connector offering greater reliability and can be connected to any USB type port thanks to the included cable
• Remote control with WiFi from any smartphone, tablet or computer and ESATTO Virtual HandPad app also for visual use!
• Many camera threaded adapters available with stop ring on the camera side to rotate and keep the camera in the optical axis
• ARCO port to easily connect the ARCO camera rotator to the ESATTO without the need for additional data or power cables