I went out to my parent's place with a grand plan to get some fantastic shots of the birds eating out of the bird feeder. I grabbed my Canon M5 which has an APS-C 1.6x crop sensor and my Sigma 150-600mm telephoto. I then added a 2x extender for good measure. Let me do that math for you. That's a grand total of 1,920mm focal length.
Well, it didn't quite work like I had hoped. With the extender, auto-focus didn't work, so I had to dial in the focus manually. I had the camera on a tripod, but I still think I needed just bit faster shutter speed to freeze the action. Even when they are feeding, birds jump around a lot. Out of a couple hundred shots, this is the only one that came out decent, and it's not perfect. The focus is off just slightly. I guess I'll have to keep trying.