4 x 5, huh? You obviously don't believe in making it easy for yourself! Somehow I find the very fast shutter speed a bit hard to believe. Electronic flash might be that fast, but depth of field is so shallow at normal shutter speeds I would have guessed a time exposure. It's a pity the highlights are blown. On film, given a bit of dodge and burn, they should be saveable... Nice textures. (Thanks for your comment!)
A beautiful composition. The b&w works very well for these blooms. I do find the net curtain background a trifle busy. The texture and details of the roses are really elegant, but the equally interesting features of the curtain are in competition. I hope you do more of these--especially since you're in an ideal workplace.