How frequently is lightroom updated to add new cameras for tethering? I recently got a canon 1300d and would like shoot it tethered and it doesnt work just yet...how long til it does?
Tethering support in Lightroom is dependent upon the support from the manufacturer's (Canon) SDK (Software Development Kit). Once Canon supports a camera in their SDK kit it is normally one or two versions of Lightroom before that support is integrated. If Canon adds it today to their SDK, Lightroom 6.6 or 6.7 would be expected.
Have you checked with Canon to see if or when they are going add it to their SDK?