| The following are the slides I am currently using in presentations to Rock & Gem clubs on various aspects of digital photography These slides have additional text added to aid them in standing alone for use on the WEB. I have had several requests to post this information for further review after my presentations. (So here it finally is.) There is some repeat material from my previous section on Digital Photography, but most of this is updated information. Fewer words - more pictures and ...
You will also find several animations that are between 5MB and about 14MB, they are all in QuickTime format so the Quicktime player or equivalent will be needed to view them. (You can obtain a quicktime player for Macintosh or Windows machines from Apple.com) None of the animations are narrated as I do this during the live presentations. I think most are self evident and can be understood without the narration.
Press the slide number to go to that slide.
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Slide #
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Title or Subject
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Animation
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Slide Show with examples of close-up work - emphasis on table top work. |
5.4 MB
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Fundamental differences in exposure calculation. |
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Traditional photographic nomenclature - does it all mean the same in digital? |
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Film resolution - how it is calculated |
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Really simplified camera |
7.6 MB
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How the f-stop value is calculated - the true rule of double and halve. f - 1.42421... |
5.2 MB
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The IRIS as light valve |
7.4 MB
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Cirlces of confusion I - real world / virtual world |
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Cirlces of confusion II - define it |
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Cirlces of confusion III - 1/3 - 2/3 rule |
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Depth of field example |
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Photographing flat objects |
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The ccd cell - an introduction |
8.6 MB
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The ccd array - the recording media |
13.3 & 9.9 MB
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The Bayer pattern and color - color is an area function |
14.8 MB
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File formats - RAW - JPEG - GIF |
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Focal Plane Shutter - stopping motion - electronic flash limited speed |
3 MB
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Resolution - the myth in digital photography |
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How many pixels are enough? 17 page pdf file on resolution ( =>get pdf<= ) |
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Things to remember - 4 simple truths |
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Film size vs ccd size - equivalent lenses |
13.1 & 5 MB
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The infamous Salad Bowl and other tools |
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It's all done with mirrors, ... and paper, and foil, and other stuff |
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A gemstone holder |
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My first light chamber - the bowl revealed |
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Why use a light chamber |
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Add a simple light box |
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Modify the bowl |
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Metallic results from the bowl |
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Gemstones and the bowl - minerals and the bowl |
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A few final results via the bowl |
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Ott not Ott - when is white actually white and why? |
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Color Temperature - the chart - The best light bulbs |
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The color of light - where to get those grayscale cards |
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Camera white balance is a necessity not a feature |
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Ultra simple - 3 ways to do "one step color correction" |
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Jeffry Scovil - master of mineral photography - the book |
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Simplified Scovil setup |
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The Scovil results (well a least the type of results) |
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Ways to hold the best light bulbs |
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Display stands and more backgrounds |
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The photo cube - it packs flat and softens light |
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Bigger is better - the cube again |
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Some cube results |
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Supporting gemstones on a larger scale |
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Supporting cabochons |
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Not supporting cabochons |
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White with metallic high-lights - a real pain to light |
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Floating a mineral sample |
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Expensive backgrounds done on the cheap |
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Gemstone - special lighting - improve the sparkle |
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Connecting a digital camera to a third ocular scope |
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Microscope camera adapters (from astronomy) |
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Problems with a Nikon D70 & the microscope |
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Using mini-TV cameras with a microscope |
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References and other links of interest |
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