Here a couple more beam profile pics @ 11m of an 826 diode driven @ 500mA outputting 380mW raw with different lenses:
Aixiz acrylic 268mW 70.53% thru put
Laser66 red 320mW 84.21% thru put
405-G-2 340mW 89.47% thru put
Mccarrot blue 345mW 90.79% thru put
Optima 369mW 97.11% thru put
The best bang for my buck is the optima lens paired with a barrel where the lens can’t wobble due to excessive thread play. Loosely seated threads will enable tilting of the lens causing artifacts around the beam profile. The last picture showing the effects of lens tilt with an Optima lens.