This was taken on a Quayside immediately north of the Canary Wharf financial district with its towers on the right of the picture. The curved tower in the centre is the London Marriott Hotel. The crane in the image is a preserved one from the time when Docklands was an active port not a financial centre. This was a 57 seconds long exposure using a B&W 10 stop Neutral Density filter. A few minutes after this picture was taken the first spots fell and I retreated to under a bridge by the DLR Station just in time before the downpour started which set in for the evening. I still managed a fair few more shots from undercover locations.

The picture was taken on a Tripod with a Sony A700 with a Sigma 10-20mm lens at 11 mm. One RAW image shot with a 10 stop ND Filter. After Raw adjustments I extended the sky to make room for more perspective correction. This is done in Photoshop by first extending the Canvas Size above the image by about 200 pixels. I had about the same amount of sky above the Towers. A rectangular selection was made and then edit and Free Transform. Then it is just a matter of dragging and expanding the sky into the extra canvas area. This gives more room above to use filter, lens correction custom and vertical perspective to straighten the converging verticals of the Towers.

A little Noise was removed with Nik Define. I used Topaz Clarity for more detail and Topaz Adjust applied on a duplicate layer with a mask to darken and smooth just the sky.