Photography by Randy Hanna

Not very often does one run across an application that makes your life simple when it comes to taking photographs.  In this case TPE  is free, available for Mac, PC, was well as the the iPhone.   While there are many applications for the computer and iPhone which annotate sunrise and sunset for a given location, this little beauty stands apart from the crowd as a true interactive planning tool.  The Photographer’s Ephemeris  can depict  sunrise, sunset, moonrise, and moonset PLUS it will show the actual sun angle at any give hour from any given location, all with the Google Earth / Google Maps in the background. TPE is fairly simple in concept: 1) display a Google Map 2) choose a date 3) calculate and display a bunch of astronomical data.  The tricky part comes from the connection between 1 and 2. Most similar programs and web-sites have you select from a pre-defined list of locations, where, presumably, things such as the relevant time zone are already saved – not much help if you are in the middle of BFE and it is not on the pre-defined list.  I love it as a planning tool and will use it in planning my outdoor shoots.  As an example, the screen shots below indicate the sun angle by the thin yellow line, while the thicker yellow/orange lines indicate sunrise and sunset direction.  Lots of detailed explanations are on the site so give it a look.

Head on over to The Photographer’s Ephemeris and run the tutorials, download the application.  If you like it be sure to come back and toss the author some coins for his efforts.

Cheers and happy photo’ing

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Hyperfocal distance is a function of focal length, f-number,  and the circle of confusion (or most correctly, the circle of least confusion).  Simply put, using the hyperfocal distance setting at any given aperture will result in the greatest depth of field (New York Institute of Photography).  At the heart of the hyperfocal equation is a value known as the circle of confusion (CoC).  The CoC is, without a doubt, the most misunderstood and controversial variable among imaging experts.  The basis for the CoC has invoked a debate that has been raging for some 70 plus years and will certainly continue into the future as the purists refine the resolving power of imaging devices.  Boiled down to the most basic level, the CoC is the reciprocal of resolution and is directly related to the sensor size of the digital camera.  The CoC describes the smallest image element that retains identifiable details.  Obviously, this would vary based on the distance from the object in primary focus.

Although I will further explain and provide examples of how to use hyperfocal distance in the next update, if you have an iPod or an iPhone, you are in luck  because there are two good applications to assist you.  Rather than carrying around a number of tables, simply let Mr. Apple do the math for you.  In coming postings, I will review the hyperfocal distance applications as well as demonstrate several applications of hyperfocal focusing and the benefits of such, so come on back for parts II and III.  ‘Til then,

Happy photo’ing

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