Infrared portraits and nature

I am finally getting the hang of using this film.
The shots that look really grainy were made at 1/4 and at f5.6. bad combination.
I had better results shooting at 1/2 or 1 and using the f16 apperture.
Isnt it crazy that his sunglasses look transparent? And yeah, I look like a GHOST in IR!!!
I am really happy with the results but I still have a lot to learn about IR photography. (and I definetely need a more supportive tripod -I use a small gorillapod-).