Many of these mounts can be used for astrophotography, to varying degrees, specially when OnStep is used to tune the backlash and periodic error correction (PEC). This axis is aligned with earth's rotation axis. Equatorial MountsĮquatorial mounts track the apparent movement of the sky using only one motor (on the Right Ascension axis). So avoid attaching large attachments in your replies. As new users post attachements, older ones are erased. Important Note: Some of the links below will not show images, because of the fixed amount of storage allocated to this group. Or if you have a web site, post the information and pictures there, and reply with the links. If you did build a controller with OnStep, please subscribe to the mailing list, and post description and images as a reply to this message. OnStep is being actively used for anything from EQ4 type consumer telescopes, all the way up to an 80cm Ritchey-Chretien in an observatory in Italy (that is 31 inches of aperture!). This page showcases what users have built with OnStep.

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