Tuesday, August 03, 2010
Another DOF Stacking Success
I saw this orb weaver spider pretty late this evening. The sun had set and it was getting dark quickly. It was so small that I had to use extension tubes on a macro lens to get it to fill the frame. This meant having to stop down a lot to get sufficient depth of field. Also, since the spider was in the shade, even at ISO 6400 I was getting shutter speeds of 1/4s @ f/10 (and f/10 was providing nowhere near enough depth of field). There was also an occasional slight breeze so lowering the ISO or stopping down even further was out of the question (the shutter speeds would be even slower). So I took three images, each with the focus point moved slightly more backwards and hoped that Photoshop's Auto Blend would work. I was pretty happy to see that despite the spider having moved slightly because of the wind, Auto Align and Auto Blend did a great job.
I just printed out a 13x19 of this image and despite the slow shutter speed and high ISO the print is beautiful.
Technical Specs: Canon 5D2, 180 macro + 36mm extension, f/10, 1/4s, ISO 6400 (stack of 3 images).