Just me, back again....
The loco I showed being weathered earlier has been put back in service. Here she is blasting through the lower tunnel at Hopewell Junction:
I am actually taking photos to use for a Model Photography clinic I am presenting the 1st. of May for my local division of the NMRA. The photo above was shot just using layout lighting using a Canon Digital Rebel Sxi, f/20, ISO 200, exposed for 5.2 seconds. Headlight was turned on for about 1 second during the exposure. The blue in the tunnel is the painted wall behind the layout. So Photoshop quickly removed the offending color:
I took this one with everything the same, except it was shot at f/32 and the headlight was left on for the entire 12 second exposure time resulting in the flare:
Finally I decided to play around with adding smoke to the scene. Not sure I like it so I will do more work with a different smoke addition later.......
I will be using several of the photos to illustrate what can be done and how it affects the photo.
[edit] one last shot taken with my 100mm fixed lens, f32, 32 second exposure. Camera had to backed away about 2 foot to get the shot. Headlight was on for just 5 seconds. The medium telephoto/macro lens even stopped way down is fragile when it come to depth of field........ Enjoy!