| Author |
Message |
    
Peter Olsen
| | Posted on Friday, November 09, 2001 - 3:44 pm: |   |
In using the Wizard and it calls for the focal length, what does this mean in relation to a zoom lens that has a number of focal lengths? For example, if I zoom into a subject do I still use the basic focal length of the lens? If not I would have no idea what length I'm using when I focus on a subject. I realize the zoom must remain the same for the shots. |
John Strait
| | Posted on Friday, November 09, 2001 - 11:25 pm: | |
You are correct that the focal length of a zoom lens varies depending on how much you have zoomed.
The Panorama Factory produces better results if you enter the focal length that was actually used for the photos, but it may be hard to determine exactly what that is. Luckily, in many cases The Panorama Factory can automatically determine the focal length. That is the purpose of the Refine focal length while stitching choice on Wizard step 2.
It helps to start with a good guess at the focal length. So if you used a zoom setting close to the most wide angle setting, start with a number closer to the lower end of the focal length range. If you used a setting closer to the most zoomed setting, start with a number closer to the upper end of the range. Select I do not know the focal length and The Panorama Factory will try focal lengths from 31mm less than the number you entered to 31mm more.
If you do not achieve satisfactory results from the automatic focal length refinement, you may also find it helpful to read A manual procedure to determine focal length.
I hope this helps! |
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