Another feature of SDM allows you to extend the shutter speed beyond the normal 15-sec. limit. This exposure was 50 seconds which created a "ghost image" of the observer as he changed position while looking through the eyepiece.
Duke
--
Canon twin-rig, SDM, SPM, Photoshop.
My 3D on Flickr
http://tinyurl.com/4827bx
Click on a thumbnail pic, then
Click on "all sizes" icon (for full size)