The Celestron Focus Motor for SCT & EdgeHD provides electronic focusing for Celestron Schmidt-Cassegrain (SCT) and EdgeHD telescope optical tubes. With the focus motor installed, you can bring celestial objects into sharp, precise focus using your telescope’s hand controller or a computer instead of using the focuser knob. A focus motor is great for visual observers who want to dial in exact focus (especially those with dexterity issues) and a must-have accessory for astroimagers. With a motorized focuser installed, an astroimager no longer needs to be physically near the telescope to focus an image. Combined with computerized control of the mount and camera, the focus motor enables the imager to gather data remotely from a backyard observatory, or even a telescope located hundreds of miles away. As an added bonus, port covers protect the ports while not in use, and the covers cannot be lost due to the tethered design.

Compatible Optical Tubes

The focus motor is compatible with all SCTs from 6” to 14” in aperture that have been produced since the year 2006. It is not compatible with 5” SCTs or older models. It is compatible with all EdgeHD optical tubes, the 8” Rowe-Ackermann Schmidt Astrograph (RASA), the 36cm RASA, and the 7” Maksutov-Cassegrain. It can also be used with the 11” RASA, but requires the Focuser Retrofit Kit for RASA 11.

Power Options

There are three options for powering your Celestron Focus Motor:

1. When using a Celestron computerized mount, you can power and control the focus motor through the mount using the supplied AUX cable. This allows control from the mount’s hand controller (NexStar+ or StarSense) or a computer.
2. If you are not using a Celestron mount, you can power and control the focus motor from a computer USB port. You will need a user supplied USB A-to-B cable.
3. You may also opt to use an external 12V DC power source which plugs into the motor’s power jack.

Compatible Software

Celestron offers a free Focuser Utility program for computer control. The Celestron PWI software can also control the focus motor. To use third-party focuser control software, an ASCOM driver is needed.

Celestron Focus Motor Bulletin

SPECIFICATIONS

ZWO’s legendary Electronic Automatic Focuser (EAF) platform gets a smart, modern update with the new EAFN. Designed for astrophotographers who value precision and simplicity, the EAFN retains the solid mechanical design of the original while introducing a USB-C connection and micron-level focus accuracy for today's imaging demands.

It’s the perfect fit for users who want a clean, efficient setup without sacrificing performance.

What’s New in the EAFN:

• USB-C Interface: Easier to connect in the dark, more robust, and in line with modern gear.

• High-Precision Focusing: Delivers micron-level step resolution for ultra-fine focus control.

Tech Specs:

• Connectivity: USB-C, 3.5mm port for hand controller or temperature sensor

• Supported Platforms: ASIAIR, ASCOM, INDI

• Payload Capacity: Up to 5 kg

• Status Indicator: Integrated LED

The ZWO EAFN is a sleek and dependable option for both new and experienced imagers looking to enhance their focusing precision—without the extras. Reliable, accurate, and easy to integrate, it’s everything you need and nothing you don’t.

ZWO EAF Pro – The Next Evolution in Electronic Focusing

ZWO’s best-selling Electronic Automatic Focuser (EAF) just got even better. The new ZWO EAF Pro builds on the rock-solid performance of the original by adding Bluetooth wireless control, a built-in rechargeable battery, and onboard manual focus buttons—all in the same compact form factor. It’s the perfect upgrade for astrophotographers looking to cut down cable clutter and gain more control at the scope.

What’s New in the EAF Pro:

• Go Wireless: Integrated Bluetooth and a 2500 mAh battery let you focus remotely without a tangle of cables.

• Streamlined Upgrades: Shares the same mounting footprint as the standard EAF (5V bracket compatible), so switching over is simple.

• Manual Control Onboard: New physical Focus In/Out buttons allow fast and precise adjustments at the scope—no need to reach for your phone or controller.

Tech Specs:

• Connectivity: Bluetooth, USB-C, 3.5mm port for hand controller or temperature sensor

• Battery: 2500 mAh rechargeable

• Supported Platforms: ASIAIR, ASCOM, INDI

• Hardware Controls: Power switch, Focus In/Out buttons

• Payload Capacity: Up to 5 kg

• Status Indicator: Integrated LED

Whether you're fine-tuning critical focus for deep sky imaging or just want fewer cables in the dark, the EAF Pro is a smart, streamlined upgrade for any astrophotography rig.

• The Series-5 focuser is a large capacity focuser for use with Alt/Az, or equatorially mounted systems.
• The focuser is capable of lifting 40 lbs (18 kg) with a travel range of  0.6-inches (15,200 microns).
• The Series-5 focuser can be stacked with the Series-5 rotator for a complete focusing rotator solution (combined 2.78″ of occupied backfocus).
• Occupies only 1.675” of backfocus.
• 464.4283 encoder counts per micron
• Controlled via PWI4 software for autofocusing and optional field de-rotation (if using an Alt/Az mounted system).
• Requires the Series-5 Controller.
• Compatible with the DeltaRho 350 and RC700 telescopes.

• The Hedrick focuser designed by PlaneWave is a heavy duty no-slip focuser capable of handling an imaging payload of up to 20lbs.
• Occupies 3″ of backfocus with the focuser fully racked in, and 4.2″ when fully racked out.
• Focuser travel range of 30mm (30000 microns/1.2″)
• The focus tube runs on 5 bearings and is driven by a leadscrew so there is no chance of slipping.
• Focus may be automated through a computer using PlaneWave’s EFA Kit and PWI3 software.
• The focuser comes with pre-installed motor that can be controlled with the EFA hand controller or PWI3 software.

Introducing the New ZWO EAF 5V , this electronic focuser, like its previous version, enables precise, dynamic focus control for planetary and deep-sky imaging, while only connected with 5V USB.

No more need for independent 12v Power when it can run from a USB power source.

Features:

1. Highly integrated design
2. Support ASCOM platform and various ASCOM-compatible third-party software
3. Support INDI
4. Support original software such as ASIAIR and ASIStudio
5. Support automatic focusing for DSO imaging
6. Support handle controller and manual focusing
7. Support temperature sensor
8. USB HID device and drive-free
9. Stable and durable

Compared to its old version, the main change of ZWO EAF V5 is to remove the 12V power supply port. Now you can directly connect it to your camera, laptop or ASIAIR PRO via the USB 2.0 port & cable for both data transmission and power supply. This would not only make the cable management much easier, also effectively reduce the supply pressure.

The innovative decorative pattern on the EAF is inspired by the changes of Airy disk during focusing and the focusing curve, which makes it clear at a glance how this focuser works.

There are two variants of the ZWO EAF V5:

Advanced Version: EAF body, flexible coupling, motor bracket, USB2.0 cable, hand controller, temperature sensor.

The hand controller provides an easy method of focusing the telescope, featuring IN and OUT buttons, a 2-line display, slow and fast speed rate control.

A “must-have” option for EAF users!

Support list:

SkyWatcher Astrophotography Reflectors, SkyWatcher Black Diamond, SkyWatcher Dobsonians, SkyWatcher Maksutov-Newtonians.

SharpStar telescopes,

SkyRover telescopes,

TS Optics,

Astro Tech,

Feather Touch,

Please be aware that not all modules from the brands above are supported. You can read this instruction for the full supported list and the connection methods:

ZWO EAF Compatible Focuser List & Connecting Methods

Brackets are available to suit Celelstron C8 /C925 SCT and Celestron C11/C14 SCT and some Takahashi

More focuser will be supported in the further. Please stay tuned.

Technical Specifications

Size: 59mm x 52mm x 41mm

Motor: Step motor, 35mm diameter, 7.5° step angle

Reduction ratio: 120

Power/Data port: USB2.0 port, Type-B

Weight: 277g

Capacity: 5kg

Connecting Diagram

Mechanical Drawings