djtoltz
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Jan 28, 2005, 2:42 PM
Post #5 of 6
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Re: [Glen Elliott] Digital Camera for Real Estate
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It is impossible to recommend a focal length without knowing the size of the focal plane. For a 35mm focal plane, a quality 24mm would be quite sufficient for real-estate photos. A fisheye lense is required for some of the cool VR tools, but I wouldn't recommend it for straight photos; especially outdoor shots, where you can get back far enough for a standard wide angle to work fine.
Using a camera with a fixed lense, it's unlikely that you'd find anything that would offer a wide field of view. The ones I have used with a moderate wide angle have pretty bad barrel distortion.
Before I get too far from my original point, it's important to realize that focal length is strictly the distance from the objective lense to the focal plane. Depending on the size of the focal plane, the same focal length will give you a varying field of view.
For example, with a 1/2" CCD, a 10 mm lense is not wide angle, whereas, with a 5"x7" view camera, a 50mm is extreme wide angle (fisheye).
My Panasonic DVC-80 has a 4.5 - 45mm lense, but it does not have a wide field of view at it's widest focal length. By contrast, I get a wider field of view with my 28mm lense on my 35mm camera.
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Douglas Toltzman
Hubert, NC
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