FPV Lenses: Focusing, FOV comparison and IR Filtering

Is your FPV picture just a little soft, or looks not quite right. Try turning that lens a bit.
I also wanted to look at different FOV's and important considerations when changing lenses. I've tended to find that most lenses are IR sensitive (i.e they don't have the filter) and instead it's on the sensor, but as we found out, this is not always the case so check first.
Banggood were nice enough to send me two RunCam lenses to play with, so here are their (affiliate) links
2.1mm (my choice of lens) www.banggood.c...
2.3mm (thread seems a bit short and I prefer wider) www.banggood.c...
A lens that would be more useful on the Diatone quad is this 2.5 Foxeer lens www.banggood.c...
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