updated: 2020-03-02

iOptron Electric Focuser for Ritchey-Chrétien OTA Dual-Speed Focuser # 8451

This focuser is normally intended for Ritchey-Chrétien reflectors, but also works fine in conjunction with TS-Optics T90/600 refractor (after a slight modification of the pulley: I just had to enlarge the central bore of the pulley by around 0.5mm so that it now fits on the tuning shaft of the TS.Optics scope as well. 


Whisper quiet operation

Powerful stepper motor

Zero backlash

Plug into iOptron Port with no external power source needed

3 speed control by a compatible iOptron hand controller

Currently supported mount (with firmware version V161101 or later):




iEQ30 Pro

iEQ45 Pro

Warning: please use iOptron Commander version V5.8 or later, I experienced some compatibility problems with older Commander version and warning messages like “outdated firmware” resulting in unstable operation. Since I updated the iOptron Commander software to V5.8 on Feb. 24, 2021, I no longer received such warnings.

More information about this focuser: see here

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