Uploaded July 2018 | Updated September 2026, 36 minutes ago

---

We had a nice discussion with Belief is a Thief (Rob). We talked about the distance to the horizon and several other topics that came to mind.
Belief is a Thief's channel: youtube.com/channel/UCOYbX3NUqOBlgScgCjwH4DA

Here's a link to the middle of my video "size of the Moon" where I describe the calibration procedures for a digital camera like the P900. The video was recorded before I realized how far this camera can zoom, so you may want to extend the distance to 100 yards/meters.
youtu.be/HB6LQS4XC8g?t=9m15s