19th July 2004, 11:54 PM
20th July 2004, 06:15 AM
The purpose of the DOF preview button is as the name suggests, for previewing the DOF of the photo before you take it. The fact that it is darker is really more incidental than anything else.
Normally, everytime you look through the viewfinder, the aperture is wide open at the focal length you have set. So the DOF is at its shallowest. Using this button allows you to actually "see" the DOF at the aperture you have chosen, thus you don't require the help of DOF calculation or charts.
20th July 2004, 09:43 AM
you must train your eye to see your focus areas are sharp for your liking really.
20th July 2004, 12:08 PM
try stopping down in increments to the desired shooting aperture, ie instead of going straight to the shooting aperture of f22, try going to f5.6, f8, f11 to get your eye adjusted to the dark viewfinder. That way, you would able to see and gauge the sharpness better. Also, sometimes distractions which are not visible at the viewing aperture can turn up in the final photo as the DOF is different, eg a tree branch close to the lens doesn't turn up at f2.8 but can be clearly seen at f11.
24th July 2004, 12:13 AM
thanx for the help....
roughly get the idea!
24th July 2004, 02:10 PM