This is one of the capture. I manage to take this shot using an Olympus E-PL5 and a Micro Zuiko Digital 9-18mm f/4-5.6, taken at about 10mm to avoid vignetting caused by the filter holder in front of the lens. As usual, a "5 stops" (2 and 3 stop) gradual ND filter used in this scene to balance the exposure of the highlight in the sky and shadow in the ground.
To use the gradual ND filter, actually we have to do the centerweighted metering to the sky and to the ground to measure the different exposures between them so we know how many "stops" we need for the gradual ND filters. But as I always only can manage to get the shot after sun is high in the sky, I convincingly always put the 5 stops in front of the lens. Exposure sets in manual mode and we use the ground metering measurement, with a little positive or negative tweaks according to condition occurs in the field.
But sometimes I used the aperture priority mode. I shut the aperture to make the speed slow enough to capture motion effect at vehicles on the street. And I override the exposure compensation to positive or negative until I get the desire effects. As I can't use a tripod, I always be careful to get a speed that won't result in blurry pictures. In my Olympus E-PL5, I still can manage to get clear shot at a speed of 1/2 seconds handheld at 10mm. Not a proffesional kind of techniques at all :).
The 3 photos above are using the tobacco gradual filter behind the 3 stops ordinary gradual ND filter. The tobacco itself behaves as an about 1.5 to 2 stops gradual filter with heavily "sunset color".
These are view to the west:
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