This is great both because of the composition and the tones/colors involved.
I agree it would have benefited from having the "rod and nut thingy" in focus, even if, keeping the same DOF, that would have been obtained by an exchange with an aft in-focus area.
This is a perfect demonstration on why DSLRs, being the great photographic tools they are, still have some limitations.
I don't know about full-frame/large viewfinder DSLRs, but with the ones I have used until now (300D, 350D and 30D) it is impossible to guarantee to have such a tiny portion of the frame in focus, before capturing the actual exposure.
With a good P&S, on the other hand, the focus could have been scrutinized in the live preview, before triggering the shutter.
Of course, were one to use a P&S for this shot, such beautiful DOF play would have been difficult to obtain and, most surely, an high ISO shot like this one would have been riddled with noise problems.
As it is, this one is a tribute to Canon's stellar high-ISO performance.
Thanks, Melbob and Mary Anne! I agree that the out-of-focus nut is a bit distracting but as Melbob says I would have needed a tripod and more time in front of the train than I had. With all those people milling around it would have been impossible! Thanks for your comments! ~Sharon
I love both of these, great 1600ISO images, both have individual character/mood. I guess you would have needed a tripod to get more DOF so it doesn't bother me really. Apart from the fascination of the mechanical arrangements, I like the textures in this. Good captures Sharon, Regards Melbob.