Using my Sony SLR, I set for Apeture priority auto disabling the flash so to create a depth of field. I vary the room lighting to produce different contrast. The loco is one of five which are currently rostered to work the Banbury-Bescot freight. The way that the fiddle yards are configurated means that one of the five is kept as a standby & used locally, until it is due back on its normal duty.