Last Friday, I tracked down planetary nebula NGC 6210. At 22x, this nebula appeared as a point source, similar in magnitude to nearby star HD 151202. Increasing magnification to 117x, at first did not present a clearly non-stellar object with averted vision. Though, I found that using direct vision on similarly bright star HD 151202 would display a very faint point source, but using direct vision on the nebula made it disappear. I assume this is because it is actually an extended light source. I'm sure this has been mentioned here already, but it is a technique that I'll continue to use. After some time at the eyepiece, I could start to discern a non-stellar representation.