A Stellar Black and White Conversion

I've been practicing my color to grey scale conversions based on what I learned from the Katrin Eismann tutorial. I'm attaching an image I converted that I thought turned out really well. I started with an amazing shot, f/1.2 at 50mm ISO 200. I worked the color channels, selecting the green channel because it gave me the most tone and least amount of noise. I converted to grey scale mode and did a levels layer to add a bit more black. Nothing else was done, any haloing was a natural light phenomena. I had a lot of fun and am enjoying continuing learning from the Black and White Artistry tutorial.