F/2, i think this is more crop factor then else, also backround was reflecting much light, so getting more attention than it should. Thank you, anyway :)
Stana is a superb model, a real performer. You just need tell her what you want, and she does straight away. She just does to the last comma what man Ray reported Helmut Newton told him, about the model being 90% of the final result, when you are lucky to shoot this top kind of models.
Thanks to you all for your comments :)
Keep up good work. Bravo.