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- >On Wed, 31 Jan 1996, Andrew Hofman wrote:
- >
- >> While we're on the subject, I should point out that Focal Distance or focal
- >> length, as Lightwave uses it, is 180 degrees wrong.
- >>
- >> What could it possibly matter? Well, it'll matter the first time
- >> you need to match perspective on some live footage, and ask the Director of
- >> Photography what exact focal distance he was using for the shot. He might
- >> say something like "50mm", which by Lightwave's definition wouldn't make
- >> sense, considering the subject was a truck at least 18 feet away!
-
- Focal LENGTH refers to the length of the LENS, not the distance to
- the subject--in LW it is the ZOOM FACTOR. Focal DISTANCE is the distance to the
- object.
-
- Unless the DOF setting works a LOT different than how I thought....
-
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