- Source WikipediaOriginally Posted by Wikipedia
Undoubtedly, "Hyperfocal Distance" is a commonly used jargon in the field of optics and photography, especially for landscape photographers. We do not want to use the smallest aperture possible simply because of diffraction. Effects of diffraction can be so severe that it outweighs the DOF increase and resulting in poor IQ instead. This is where hyperfocal distances come in to strike a balance. It can help you decide the largest aperture you can use and establish the point of focus for the given foreground subject distance while maintaining good sharpness through to the background. However, it is tedious to perform such calculations in the field.
Calculation of the "Circle of Confusion" should take consideration of Sensor/Film Size and intended print size. With the CoC value determined, you can then proceed to calculate the hyperfocal distances based on focal length and aperture size. To speed up this process, photographers often pre-calculate these parameters and print them out in form of a pocket sized table that they can refer to in the field.
I have created a simple Hyperfocal Distance Table Generator to aid those who aren't too interested in the mathematics behind all these theory. The generator bases its calculation on the indicated
1) sensor/film size
2) intended print size
3) Focal range (To adapt to different lenses)
4) Aperture range (To adapt to different lenses)
5) Aperture Adjustment Step (1, 1/2 or 1/3 stops)
6) SI unit for display (Metre or Feet)
Note: This generator is created using Microsoft Excel with VBA codes running in background. You will need to have Microsoft Excel install on your computer and "Enable Macro" while opening the file in order for the generator to work properly.
DOWNLOAD HERE (139,264 bytes)
You may also want to buy a pocket rangefinder to help you with determining distances. Cheap second hand pocket rangefinder can be found online, or if you have the money to spare, you could also get a laser rangefinder but its kinda overkill.
Have updated the Excel file to calculate DOF, near and far limits based on Hyperfocal Distance.