The connections are entirely filled. The solder dripped out.
Normally when soldering pipe, solder will wick (be drawn in) into the joint when it is properly heated. Common practice is to just add enough solder so when it stops sucking in the joint, it is full. If you are soldering by globbing solder onto the joint, then it becomes impossible to tell if the flux worked, the joint was hot enough or too hot as you can't reliably see how much solder was sucked into the joint.
Don't apply heat to the solder with the torch and drip it on the pipe.. Heat the pipe and let the hot pipe melt the solder and wick it into the joint.
Apply solder and watch it wick into the joint all the way around the pipe. If it drips off instead of wicking into the joint, something is wrong.
On scope vs field glasses. One provides space for recoil withouot poking your eye out.
