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04-12-2010, 01:09 PM   #1
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Nodal point on DA* Lenses.

Does the green stripe closes to the mount on the DA* lenses signify the nodal point? Or would the nodal point be different on each lens?

04-12-2010, 01:10 PM   #2
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I don't know the answer, but am curious: does it matter? why?

Thanks.
04-12-2010, 01:29 PM   #3
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When shooting panoramas to eliminate parallax problems you need to rotate the camera on it's nodal point.
04-12-2010, 01:42 PM   #4
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The nodal point generally changes with the focal length on zoom lenses, so the green line likely means nothing. Just from a *VERY* rough non-scientific test/guess by placing the lens on a stationary pivot of some sort, the nodal point appears to be a bit in front of the green line (for the 16-50 at 16mm).

04-12-2010, 01:44 PM   #5
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QuoteOriginally posted by noahpurdy Quote
When shooting panoramas to eliminate parallax problems you need to rotate the camera on it's nodal point.
Yup. Makes perfect sense. Thanks.

Now you know how much I shoot panoramas.
04-12-2010, 02:25 PM   #6
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From Wikipedia:
The nodal points are widely misunderstood in photography, where it is commonly asserted that the light rays "intersect" at "the nodal point", that the iris diaphragm of the lens is located there, and that this is the correct pivot point for panoramic photography, so as to avoid parallax error. These claims are all false, and generally arise from confusion about the optics of camera lenses, as well as confusion between the nodal points and the other cardinal points of the system. The correct pivot point for panoramic photography can be shown to be the centre of the system's entrance pupil.
And see the citations.
04-12-2010, 02:30 PM   #7
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Whatever you want to call it, it's the point where you will least likely have problems with stitching vertical panoramas (horizontal ones, and landscape panoramas are not necessarily so fussy). And you need to find the nodal point (or focal point, or entrance pupil) for each lens's particular focal length. But this will only be a major problem if you are shooting interior panoramas. Outside, I wouldn't worry so much.
04-12-2010, 11:36 PM   #8
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Very interesting. I have only really tried one vertical panorama so far (but I just let Microsoft ICE do all the work anyway).

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