suma-harp strings stretched only one

Camera：Nikon D300, Lens：Tokina AT-X12-24mm F4DX
Exif：Aperture priority mode, 0EV, ISO= 200, SS= 1/6sec, f=5.6, Focus distance= 12mm, No flash
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Camera：Nikon D300 + Gitzo Series2 Reporter Performance Monotripod Convertible, Lens：Tokina AT-X10-17mm F3.5-4.5DX Fisheye
Exif：Aperture priority mode, +2.0EV, ISO= 200, SS= 13sec, f=22, Focus distance= 12mm, No flash
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Camera：Nikon D300, Lens：Tokina AT-X12-24mm F4DX
Exif：Aperture priority mode, 0EV, ISO= 800, SS= 1/15sec, f=4, Focus distance= 12mm, No flash
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Camera：Nikon D300 + Gitzo Series2 Reporter Performance Monotripod Convertible, Lens：Tokina AT-X10-17mm F3.5-4.5DX Fisheye
Exif：Aperture priority mode, +3.0EV, ISO= 200, SS= 15sec, f=22, Focus distance= 10mm, No flash
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Camera：Nikon D300 + Gitzo Series2 Reporter Performance Monotripod Convertible, Lens：Tokina AT-X10-17mm F3.5-4.5DX Fisheye
Exif：Aperture priority mode, +1.0EV, ISO= 200, SS= 15sec, f=8, Focus distance= 10mm, No flash