Some out of focus areas in front of, and/or behind, the area of interest can give an effect of depth.Ģ. I usually don't use enough images in the stack for all of the image to be in focus, as it often looks to flat that way. For thumbnail size specimens, I find that ~10 images is usually enough to give good DOF for the area of interest. Since you are stacking, the reduced DOF just means more images in the stack. Nearly all camera lenses have best resolution around f5.6 or f8, perhaps two f-stops from wide open. While this increases DOF, the image will suffer from diffraction effects. If you are shooting at greater than 1:1, then the effective f-stop is even larger. At 1:1, the effective f-stop is Effective f-stop = f-stop X (1 + Magnification) = f22. The image was shot with the lens set to f11. I am fairly certain that it could have been presented just as well with only 1/2 so many words.Īside from color problems, which Ron and others have well addressed, I see some basic macro and stacking problems in your second image.ġ. If you have made it this far, please excuse that it took me so many words to reach the end. Not sure what could be causing this result or how to fix it. Last notable problem seen in many of the photos are the sort of cloudy blue areas that are seen to some extent in all of the images. I am not sure I am seeing any improvement in this regard from my 2002 vintage Canon D60, which is several generations older technology. I am curious if anyone has found anything that helps minimize this kind of limitation. From the number of photos with similar colors I was able to find with a Google search I am thinking this may well reflect a limitation of modern digital sensors. No matter how I tried to adjust colors in Adobe Lightroom I did not even come close to accurately reproducing the electric blue color I was hoping for. Probably also a good idea to add a black background to avoid distracting colors in background. Biggest unplanned flaw is out of focus area front left. The straight on angle and blurred background add an apparent depth of field to the subject for a more pleasing to me image. My navy blue wallet probably not best choice of background prop.īest result of 15 stacked images with only 12 mm extension tube taken at eye level with an led flashlight in addition to my daylight desk lamp. Though most individual images have an area of focus the resultant stacked image is generally out of focus for an unknown reason.īetter result of 15 stacked images with only 12mm extension tube. Top view of specimen that is on a just over 5cm base (Single Photo 2s F22).Ĭlose-up attempt using both 12mm extension tube and macro filter added to front of lense (15 stacked images taken at F11 manually focused from front to back). All were taken from a sturdy tripod using a 2 second shutter delay to calm vibrations from pressing shutter release. The following pics are the best of nearly 100 total taken with my recently upgraded Canon 70D with basic Sigma 24-80 using the macro setting on the lense at 80MM. I wanted to see how close I could come to the electric neon blue this mineral is noted for, and thought it would be a good test to see how much detail I could get in focus with my 30 day trial version of the Zerene Focus Stacking software. One of the minerals I have tried to capture recently has been my lone basic sample of Cavansite on Heulandite. From all of the great photos I have seen on this board I am sure there are more than enough mineral photographers here for us all to improve our skills and take better pictures. My idea for this thread is for anyone who is interested to share photos of mineral specimens they have found difficult to photograph with a description of the problems encountered and solutions they found in the process, with the hope that others can add either additional tips that have worked for them, or other examples of difficult to photo minerals. My success rate is much less than I would like to admit often requiring that I experiment with many different camera settings/positions, lighting, backgrounds, lenses, etc. Though they do at least sit still, the same near infinite variety of shapes, sizes, textures, colors, transparency, reflectivity and other mineral properties that attract us to them can make them challenging subjects to photograph well, some much more than others. Recent Images in DiscussionsĢ7th Mar 2014 02:13 UTC Anonymous User The more minerals specimens that I have attempted to photograph the more I have learned that no one method seems to work all of the time. Currier Digital LibraryOpen discussion area. Techniques for CollectorsOpen discussion area. Minerals and MuseumsOpen discussion area. Mineralogical ClassificationOpen discussion area. Lost and Stolen SpecimensOpen discussion area. ╳Discussions □ Home □ Search □ Latest Groups EducationOpen discussion area.
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