Last night Kris and I paused at Leaman in Paradise, Pa., to roll by Amtrak’s Keystone enroute to Harrisburg.
It had been raining heavily all day, and just as I stepped out of the car the sky opened up.
I’d set my Lumix LX7 to ISO 400, which is about the functional limit of its sensitivity. While it is possible to set the ISO setting higher, the results are not usually worth it.
I set the zoom to its maximum (17.7 mm), which about the equivalent to a 70mm lens on 35mm film camera. As the train drew close, I panned the leading ACS-64 locomotive with the shutter a 1/100 of second in effort to keep the locomotive and train as sharp as possible despite comparatively high speed.
The pantograph of the locomotive was dispersing water from the overhead catenary as it sped westward.
Below are two versions of the same file.
The first is the in-camera RAW without adjustment or cropping, but scaled in Lightroom for internet presentation.
The second is an interpreted file. First, I converted the RAW to DNG using DxO PureRaw, which corrected for lens defects and reduced the effects of pixelization from high-ISO, while effectively sharpening the image. I then imported this file into Lightroom to make cosmetic adjustments to contrast and exposure, lightening shadows and reigning in the highlights.
PureRaw’s re-interpretation of the pixels in the RAW file combined with water on the lens, pouring rain and panning motion resulted in some visual artifacts that are something other than was perceived with the naked eye. However for presentation here, the interpreted PureRaw version (complete with post-processing cropping) appears as a more dramatic image.


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