|
The Minolta D7/A1/A2 GT lens does not include a depth of field scale. The following is a list of common focal lengths, apertures, hyperfocal distances and depth of field. These calculations are based on a .006mm circle of confusion. Calculations performed using the PalmPilot version of DOFMaster LE, by Don Fleming at www.dofmaster.com.
7.2mm Focal Length (28mm approximate equivalent in 35mm format)
F2.8, 3.06m focus distance, 1.53m-Infinity.
F4.0, 2.17m focus distance, 1.08m-Infinity.
F5.6, 1.53m focus distance, 0.77m-Infinity.
F8.0, 1.09m focus distance, 0.54m-Infinity.
F11, 0.77m focus distance, 0.39m-Infinity.
12.7mm Focal Length (50mm approximate equivalent in 35mm format)
F2.8, 9.52m focus distance, 4.76m-Infinity.
F4.0, 6.73m focus distance, 3.37m-Infinity.
F5.6, 4.76m focus distance, 2.38m-Infinity.
F8.0, 3.37m focus distance, 1.69m-Infinity.
F11, 2.39m focus distance, 1.19m-Infinity.
25.4mm Focal Length (100mm approximate equivalent in 35mm format)
F2.8, 38.0m focus distance, 19.0m-Infinity.
F4.0, 26.9m focus distance, 13.5m-Infinity.
F5.6, 19.0m focus distance, 9.5m-Infinity.
F8.0, 13.5m focus distance, 6.7m-Infinity.
F11, 9.5m focus distance, 4.76m-Infinity.
50.8mm Focal Length (200mm approximate equivalent in 35mm format)
F2.8, 152m focus distance, 76.1m-Infinity.
F4.0, 108m focus distance, 53.8m-Infinity.
F5.6, 76.1m focus distance, 38.0m-Infinity.
F8.0, 53.8m focus distance, 26.9m-Infinity.
F11, 38.1m focus distance, 19.0m-Infinity.
For a point of comparison, the following were calculated for a 200mm lens in 35mm format:
F2.8, 566m focus distance, 283m-Infinity.
F4.0, 400m focus distance, 200m-Infinity.
F5.6, 283m focus distance, 142m-Infinity.
F8.0, 200m focus distance, 100m-Infinity.
F11, 142m focus distance, 70.8m-Infinity.
F16, 100m focus distance, 50.1m-Infinity.
F22, 70.9m focus distance, 35.5m-Infinity.
F32, 50.2m focus distance, 25.1m-Infinity.
|
|
