Every shot you get must be properly focused, which is crucial in any professional production. Soft focus shots, unless used for artistic effect, don't count as shots that are in focus.
To focus a telephoto lens you must calibrate it first
Look on the lens controls and slide the FOCUS switch to M for Manual (A would set the lens to Automatic Focus).
Zoom in all the way on your subject and focus by turning the focus ring on the lens. Then zoom out to compose your shot. Each time the camera gets moved you will need to calibrate the telephoto lens.
The large ring located on the lens is the Focus Ring. Turn this ring to focus the shot.
CAUTION In most situations, using the Automatic Focus is not recommended simply because the camera might shift the focus during recording, which could ruin the shot, especially if it’s an interview.
Getting the focus right means having to judge focus properly. You might think you can judge the focus using only the LCD monitor. But it’s actually impossible to rely on this 720p display to get true focus because this monitor doesn’t have enough pixels to render the image sharply. Focus errors are more obvious in high-definition, but fortunately there are ways to get the best focus possible.
EXPAND FOCUS ASSIST
Magnifies the centre of an image to show you more detail than the full frame view. This assist is ideal for setting the focus before you start recording, but is not available during.
This type of focus assist draws an outline around objects that are in sharp focus. Peaking works during recording, but the red outline is not visible in playback. Used in combination, the Peaking and Expand Focus Assist tools will help you achieve the best focus results.
button (usually assigned to the USER 1
quickly adjust the focus on the subject
and upon release the camera returns to
manual focus. This particular assist
doesn’t guarantee precise focus because
it may lock on a part of the image that
you wouldn’t consider to be the most
important (e.g., an interview shot where
only the background is in sharp focus).
Therefore, the PUSH AUTO shouldn’t be
used as your primary focus assist.
You can optimise the focus better if you can see the image clearly without interference from the lighting in the environment. Make sure to adjust the eyepiece corrector lever to your eyesight first before you start focusing the lens.