With larger subjects, minimum focusing distance isn't usually an issue. But when dealing with flowers the instinct of the photographer is to move as close as possible in order to fill the frame with the flower. In doing this, the photographer will move closer until the flower cannot be focused on and then will move back slightly. The problem is that when the lens is on the borderline between being able to focus and being too close, a slight wiggle of the photographer will put the flower out of focus.
There are several ways to deal with the minimum focusing distance issue.
- Use a tripod
By using a tripod, your camera will be fixed at one point and not subject to accidental bumps into the "too close" zone. - Move your body
When you are on the borderline of too close to your subject, use your body to focus the image. Set the camera to the minimum distance focus and lean forward or back until the image is in focus. This is actually more precise than trying to focus with the lens and compensating for slight body movement at the same time. - Change the minimum focus distance
By using extension tubes (compare prices), you will increase the distance between the rear element of your lens and the film or digital sensor. The effect of this is to allow much smaller minimum focusing distances in front of the lens.
