>> I am struggling getting adequate Depth of Field when shooting macro >> subjects. Tilt-shift only works for planar objects. Looks like digital >> compositing is the only reasonable method.
> Here is a trick I saw on a recent PhotoSIG article. Check it out. > http://www2.photosig.com/viewarticle.php?id=720 Hi Branden, If you read that article carefully, you will realize that they achieved tilt focussing using digital compositing. I.e. The lens was focussed to a different position as the image was "scanned" from left-to-right. The problem is that the photographer has to choose which part of the images to use, and therefore cannot automate the process. If you look back at the EOS archives, I had suggested that this could be a built-in feature of some future EOS digital camera :-) I.e Set DEP 1 on the left, set DEP 2 on the right, and the camera will take 5 or so shots, masking the images from left-to-right was the lens is focussed from near-to-far. There was a much older webpage that described a better technique using selective image masking. Unfortunately, the server was removed about 3 years ago, and I cannot find it again. >From memory, they took several pictures (tomograms) and applied blur-subtraction using Photoshop (v. 2 or 3). I.e. Blurred the picture and used a difference layer to create a mask in order to keep only what was sharp in each picture. Then they took the sharp parts of each picture and composited (layered) them together. The (small) example image used white seamless on the background, so it worked quite well. Cheers Julian Loke P.S. Any takers for a source of TELECENTRIC lenses? Does B&H sell them? * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
