I am a noob in photography and don't have any idea of lenses and optics...
Recently though I was looking out for some camera modules and couldn't understand some of the specifications mentioned in the data-sheet.
One of them stated that the Lens construction is 4P + IR, what does this mean?... To an extent I understand the IR part indicates to some filter in the lens.
I searched for the term "4P Lens" on the web but it didn't return relevant results either?