Shouchen,
That is a quality shot. I posted one similar but did not achieve that sharpness. From a learning point of view I would appreciate if you would check mine out and offer a simple critique ? Is it the glass or the operator - me ?
Thanks for your comment. I looked at your shot, and realized it is different type of fire. And it looks great. The only thing I can think of is the tripod and the lighting - fire in this case.