I undertook an oil change, started the car up to check the oil level as you do..
Dont want to make an issue out of this but starting the engine is not the best thing to do.
Best to remove the king lead from the distributor, remove the injector plugs, then turn the car over using the ignition until the oil pressure light goes out.
This insures the new filter is loaded with oil as well as all the oil galleries and removing the injector plugs means the barrell is not washed of oil either.
By the time it takes to put the leads back on the oil will have nearly settled back into the sump to check the levels.