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Radian Telescopes 61 Electronic Focuser Upgrade


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  • Designed to work with the Radian 61 Telescope, compatible with any 2.5", 2.7", and 3" Feathertouch focuser.
  • Automated system to get extremely accurate focus on the first try
  • Compatible with ASCOM, X2, and INDI software for versatile use with Windows, Linux, & Raspberry Pi operating systems with Mac compatibility coming soon
  • Please note: the Radian Electronic Focuser is incompatible with the ZWO ASIAIR Pro
  • Included power supply and USB cables for connecting directly to your computer with no additional focus controller needed
  • Lightweight and portable with a low power draw
  • View the Electronic Focuser Quick Start Guide for seamless set up

Product Details

  • Radian Electronic Focuser Upgrade
    Focus Automation At Your Fingertips

    For those who want to do away with the task of manually focusing altogether, we are pleased to offer the optional USA-made Radian Autofocuser as an immediate automation upgrade specifically designed for the Radian 61 Telescope,  but compatible with any 2.5", 2.7" or 3" Feathertouch focuser.

    We know some prefer not having to second-guess focus accuracy by hand, or would rather control their system from inside on colder nights. The Radian Autofocuser's high-resolution stepper motor allows you to adjust focus directly (without an additional focus controller) via software from your computer to ensure you get perfect focus automatically every time.


    Radian Electronic Focuser Upgrade
    • Extreme Precision High-resolution stepper motors allow for the finest micro-adjustments to be made so you can dial in razor-sharp focus.
    • No More Second Guessing Using focus automation software, you don't need to waste unnecessary time trying to double and triple check focus. By using V-Curve models to automatically identify the best focus position, software can accurately find perfect focus on the first try.
    • Versatility With Nearly Any System Unlike other focusers, the Radian 61 Electronic Focuser is compatible with all ASCOM, X2, and INDI software, making it compatible with Windows, Linux, and Raspberry Pi operating systems, with Mac support coming soon. Please note this product is not compatible with the ZWO ASIAIR Pro due to limitations by ZWO.
    • Manual Override For those moments when you just want to focus by hand, an integrated clutch releases to allow use of the manual focus knobs.


    Radian Electronic Focuser Upgrade
    • Ultra Lightweight Too many focusers add unnecessary weight and unwanted torque into your imaging train. Weighing just 6.4 oz (185 g), the Radian Electronic Focuser can even be used on a travel-friendly star tracker mount.
    • Goodbye Focus Controller Many electronic focusers require a bulky additional focus controller just to control the focuser itself, which adds unnecessary weight and more cables to get snagged on. We decided to cut the middle man and just allow the focuser to connect directly to your computer via included USB cables, eliminating unnecessary parts.
    • Low Power Draw The focuser draws less than 1 amp of power at all times, making it easy to power even with your computer by using a third-party USB to 12V DC converter cable.



  • specifications

    Assembly Tools1/16" and 7/64" hex keys (included)
    Focuser CableUSB B to USB A (3 ft and 15 ft cables included)
    Length3.7" (94mm)
    Material6061 Aluminum anodized black with black knob
    Power Draw12V DC at <1A (AC Adapter included)
    Weight6.4 oz (185 g)
    Width1.9" (48mm)
  • included items

Product Reviews

Customer Reviews
4.3 Based on 3 Reviews
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casey s.
United States United States

Pretty neat

Was easy to install and works well. I little high in the $$ but it’s made well and simply just works

United States United States

Great Focuser - Unfortunate Driver Support Information

I got the focuser as part of a holiday gift with matching telescope. I have been really happy with both. I know there is a bit of bad rap because this scope and products may be a conglomeration of existing items, but the fact that you take it out of the box, and use it with little setup, that has to be worth something. The focuser is the same, it just works. Took it out of the box, took off scope knob, put this focuser on, worked the first time. I have hand built 3 other focusers, I am currently building one, and am on week 2 of design, alignment, mounting, electronics and firmware modification. It is nice to just buy and go. This focuser is a good smooth operating focuser and appears to be well built with very little plastic (there may be some on the inside, but none shows on the outside). It has a "clutch" to allow you to operate the knob focuser while it is attached to the scope. The scope + focuser produce nice round stars and the overall focus is spot on. As far as driver support, I use INDI and Ekos, and was worried that I would have nothing. I was prepared to write up a USB driver if necessary, but I wanted something out of the box. Upon research, I saw that this unit was close to the FocusLynx design and I tried that, and it worked. This may help some ASIAir owners (I would NOT purchase this for use with ASIAir [yet, until it is supported], but if you have one and want to try, that is what I found).

CJ (.
United States United States

Great focuser! Great quality! 4.5 stars!

N.I.N.A. works very well with this focuser and great 'V' graphs can be achieved with the right settings in N.I.N.A. The focuser runs smooth and has been fine running with night time temps in the upper 20's/F. Its incremental steps are small enough to achieve a laser quality focus point. Being able to manually unlock the clutch and adjust is a great convenience to get close to focus before running autofocus. Works well for when you are switching between visual and imaging as well. Easy install with one exception. You need to make sure you are aligned well on the stock focuser shaft. Any little skew will cause focuser to bind or have a 'sticky' spot. Set screws should be adjusted lightly, back to back, each a little at a time. Here is where a half star is taken away and it has no real bearing on OPT. Once installed, the software download is easy, albeit not a lot of documentation. You have to launch with the web interface before N.I.N.A. will see it and connect. Once connected, you can close the interface. It is important that you pick and always use the same USB port to keep the interface from getting confused. Connect power to the focuser, connect the USB cable from focuser to computer, launch the interface and it should auto find and allow connection. Note the port it used. Be sure when connecting up, you only have the focuser connected and no other equipment. It helps the program to easily locate focuser.