wwp@yahoogroups.com:
Re: Help PTgui Nikkor 10.5 lens setting
Jim Watters 2005-Oct-09 00:58:00
>Could someone please direct me to a resource for correctly setting
>lens settings for the Nikkor 10.5. I want to do a equirectangular
>360x180 pano. And none mentions a "full frame fisheye" lens like
>the 10.5mm
>
>What lens type should I pick. Fullframe, Rectilinear....? And the
>folcal length??? is this in 35mm equiv or can I enter the known
>values. I tried using the exif data but that does not work either. I
>am defintily confused. The images are portrait.
>
>
The 10.5 is a fisheye lens. With fisheye lenses depending on the focal
length of the lens and the size of the CCD on the camera it is possible
to have either a circle (or most of a circle) or cropped in so much the
circle is no longer visible ( full frame) fisheye lens. If the image
produced is a circle or part of a circle then choose circular fisheye
and crop all the image the same to eliminate the black. If the image
fills the entire frame then choose full frame. Let the optimizer
calculate the FoV ( field of view) of the lens
>Funny thing. I have tried multiple lens calculators and they all give
>totally different values. None has been the same. Is the Nikkor
>10.5mm some mysterious lens that is top secret....LOL just frustrated
>
>Ptgui comes up with a different lens optimization every time I try
>something. I even managed to get the images to stich up side down.
>ARRRGGGGG.
>
>
Do not optimize all the images leave one image as an anchor. Optimize
all the other images so they will adjust themselves to line up with an
anchor image. This will keep them right side up. If you have set
vertical and or horizontal control points then it is possible to allow
the anchor image to optimize for role and pitch ( and you should have
some). At least one image needs to have a fixed yaw value.
>Totally confused?
>
>Troy Ward
>
--
Jim Watters
Graphic Software Developer
http://photocreations.ca