Unless otherwise indicated, these articles are in the PDF format and thus require Adobe® Reader®.  


The Ideal Medium

Article published in Stereoscopy - the publication of 3D image makers, December, 2007

          300 dpi version (20 Mb)

          International Stereoscopic Union


On Diffraction

At What Aperture Will Diffraction Degrade Image Quality?

An 80 Megapixel Full-Frame DSLR?   New!


On Depth of Field

 Choosing the Maximum Permissible Diameter for Circles of Confusion


Putting It All Together

Optimizing Aperture Selection


The Di Marzio-Davis Equations

 The Di Marzio-Davis Equations for Stereo Base

 The Di Marzio-Davis Equations for Percent of MAOFD


Frank Di Marzio's Technical Paper on the Di Marzio Equation

 The Di Marzio Equation for Stereography,  June 2005


My Methods Exposed (Five posts to a thread at

Part 1 of 5

Part 2 of 5

Part 3 of 5

Part 4 of 5

Part 5 of 5


        A Tale of Two Filters (Posts to a thread at

           The Search for a Matching Pair of Graduated Neutral Density Filters


        What a Difference 5000k Makes

           Color Temperature Comparison of Five F4T5 Fluorescent Tubes


        Using Hyperfocal Distance Effectively in the Field

           Posts to a Thread at the Analog Photography Users Group Forum


        Merklinger Exposed - Convenience Comes at the Expense of Image Quality

           Busting the Widely Embraced Myth That Focusing at Infinity Offers Convenience Without Compromise


        My Claim to Having Authored the CoC Equation in Wikipedia's Circle of Confusion Article

           Contribution to the Wikipedia Circle of Confusion Article



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