Sorry, yet another Spiral Staircase! This one is at the CitizenM hotel at Lavington Street, Southwark, London. CitizenM is a small chain of Boutique Hotels. The ground floor is a fairly busy cafe/bar and nobody seemed at all bothered by my taking pictures of their beautiful staircase. Light levels were very low and I could only just get a decent shutter speed at 1600 ISO. For this shot I decided to place the camera on the ground at the base of the stairs and used a remote trigger release. ISO 200 resulted in 1.6 seconds. Not having an adjustable screen and live view I took quite a few pictures to get one I was happy with.

I used a Sony A700 with a Sigma 10-20mm wide angle lens at 20 mm. 3 raw images 2EV spacing. The images were opened in Photoshop first and each image saved as tiffs. HDR processing was in Photomatix using Fusion Real Estate for a natural look.
This picture was enhanced with Topaz Clarity and Topaz Denoise. I cropped for better composition and did a slight vignette using a feathered elliptical selection and slight brightness reduction to tone down the corners.
The picture was given more punch using a clarity effect using unsharp mask with settings of 20 amount and 20 radius.