Hi there @oceanbee :) first of all i'm super glad you like the visual result from this session :) and thank you for stopping by. About the lens i use, you are absolutely right, this is a Canon EF-S 18-55mm f/3.5-5.6, but when it comes to the need to invert the lens through the ring, I lose the ability to manipulate the opening automatically and end up doing it manually ;) try it and you'll understand what I'm talking about :p about the ISO, you are right again lol 800 is still super high when we are trying to avoid the noise, but belive me, i'm doing this inside at night with a pretty weak artificial point of light and then i do the final edition in PS. Doing this with ISO 100 i would need much much more light :p once again, thanks so much for your comment :)