Focal lenght 20 mm (tele), 20 m to projection, 7 m to model.
Focal length 7 mm (normal), 8 m to projection, 3 m to model.
Focal length 6.6 mm, 6.8 m to projection and 1.8 m to model.
The Shoot – Start filming
Lenses & camera positions
Although it is often tempting because of the lack of space, try to avoid wide lenses as they distort the perspective and create a different feel of the space. At the same time, a focal length that is close to normal perception is not always very good when trying to film small spaces as the field of view might not be wide enough to make out the perspective of the space. It is a matter of finding the balance between showing enough of the space and keeping a natural perspective.
In still camera terms, the focal length that creates perspective considered to be ‘normal’ is 50 mm, while with the human eye it would actually be something more like 42 mm. These numbers refer to lenses on 135 system (=classic still camera). The corresponding focal lengths change according to the size of the sensor. So if you are using 1/3 inch CCD then the focal length that corresponds to a 50 mm lens on a 35 mm 135 still camera would be 7.0 mm, and 14 mm when using 2/3 CCD cameras.
Close-ups made with a tele lens (zoomed in shots) are more suggestive, more 'poetic' with a narrower depth of field. They can also be less work to shoot as you can do more shots from the same position. The drawbacks with close-ups like this can be that you might need a lot of space between the camera and the subject/object and that the perspective it renders as a result isn't realistic. Close-ups achieved by going close with the camera have the advantage that they can have a more realistic feel to them with normal perspective, but they mean more work as you need to set up the camera in a different position for each image.
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