Starting Celestron Origin Photometry

Hello,
I own a celestron origin smart telescope for the last 18 months mostly focused on imaging and have an upgraded 678C camera and a Antlia tri band filter for most of my imaging. I would like to start doing photometry with my celestron origin smart telescope. Does the community have any starter links to learn that anyone can share?

Regards
Vinny

Try the folks here:

The DSLR Handbook would be a good resource as well since it covers color chips. Mike