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Found 3 results

  1. Some focus stacking Experiments

    Greetings all, Now that we have a stationary camera on our new trinocuar stereo microscope, I tried some focus stacks, something I had never been able to do on fossils before! (I do it at work for geological specimens) I used Picolay - a free ware that works very well right out of the gate. you can get it here: http://www.picolay.de/ So here are some initial results. First, a tall spired gastropod that is about 2mm in size. I had 6 levels of focus from background to tip of the spire. First a single normal shot like I wold have had to settle for in the olden days: and now after a 6 step stack: Here is an Aviculopectin rim from the Fort Apache Limestone found recently, a very large and difficult piece to normally photograph. First the single frame: Now a 9 layer stack: I can get used to this! Comments?
  2. I had some fun yesterday combining fossil whitening techniques with focus stacking. I hope the result is interesting enough to share. I sure learned a whole lot by going through this process, and it was great fun too! So here is the story. The specimen is a Diademaproetus praecursor from the Foum Zguid region (Morocco) I prepped a couple of years ago. I applied an ammonium chloride coating, after which I shot a series of 22 pictures using a DSLR with 150mm macro lens at f13. The focus point was changed manually over the series of pictures. Because the lens features an internal focus mechnism, the focal length also changed a bit, but this posed no problem for the stacking software. A simple setup was used, with the camera on a tripod, a remote flash and two reflection screens. Post-processing was mainly cropping, some minor retouching (dust!), desaturation and level adjustments. The first thing that came to mind when seeing the results, was that I should have cleaned the trilobite better before starting. Every little dust piece is visible. Auwtch. Lesson learned. The pictures: 1. Older picture showing the specimen without coating. No focus stacking, so limited depth of field. The angle of the picture is a little different. 2. Result after whitening, stacking and post-processing 3. Detail 4. Same but before post-processing. Any feedback is appreciated!
  3. Just wanted to share my first attempt at focus stacking. These crinoid fossils were found in Sandoval County, NM. The larger fossil on the right measures 12mm in diameter. To get this shot I used my Canon 6D with a 100mm 2.8L macro lens and a tripod. I placed the fossils on a piece of black acrylic (outside) and took a series of 6 photos, each with a slightly different focus area, then I combined the photos in photoshop. Each photo was 1/50 sec, f11, ISO 400, no flash. Any feedback is welcome. -Zach Size reference:
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