> Even at 120 lines/mm (what's needed to make a sharp 8x10 from
> a 2/3 sensor) the hyperfocal distance at 7mm (28mm equiv) and
> f/5.6 is about 3.5 feet...
I'm reprinting here the DOF tables from my website. These assume
a .006mm circle of confusion. This table is applicable for any
2/3" sensor. "To Infinity, and Beyond!" Does kinda make AF a
little redundant sometimes. -AG
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.
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
==============================================
List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
==============================================
|