PanoTools:
Re: nodal point 16mm nikon full frame fisheye?
jeffreyfish2003 2004-May-05 00:48:15
Thanks Mike for your comments.
I've shoot with normal lense before and the nodal point is easy to
find on those. The Fisheye has radical distortion of the edges
compared to the centre so the far near off set relationships of
objects apears to be the same but the nodal point can be right out
and cause problems stitching - from what I've read to date and
tested the nodal point for the 16mm is on the front face of the
lense - which seems strange optically.
Regards
Jeffrey
--- In #removed#, "Mike Runge" <#removed#> wrote:
>
> I can just speak for normal lenses, but a few Millimeters
plus/minus should
> not be a problem. Maybe fisheye lenses are more sensible against
that?!
> But it's mostly depending on what kind of motiv you are having.
>
> The theoretical parallaxe you will have using a badly adjusted cam
will
> shrink while the distance to objects grows and it will grow while
the
> distance between objects grows.
>
> Try shooting a graffity wall or something ~ 2-dimensional - that
will be
> tolerant against bad camera adjustment. If you still have
problems - it seems
> to be your stitching ;-)
>
> best, mike
>
>
> On 5/4/2004, "jeff b" <#removed#> wrote:
>
> >
> >Having followed various guides to determine the lens nodal point
for a 16mm
> >nikon full frame for a film SLR, I am keen to see if there is a
specific
> >dimension from the film plane to the nodal that other users are
following.
> >I'm experiencing some strange results at the seams when stitching
and would
> >like to rule out if it is my stitching technique or camera
position?
> >
> >Does the nodal have a tollerence of forgiveness plus or minus a
few
> >millimetres?
> >
> >Is there a resource where various lens nodals are defined?
> >
> >regards
> >
> >_________________________________________________________________
> >Impossible is not a fact, it's an opinion. Have your say! Check
out the
> >inspiring stories at http://www.adidas.com.au/impossible We
dare you.
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
------------------------ Yahoo! Groups Sponsor ---------------------~-->
Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark
Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada.
http://www.c1tracking.com/l.asp?cid=5511
http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/.Cr1lB/TM
---------------------------------------------------------------------~->
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/PanoTools/
<*> To unsubscribe from this group, send an email to:
#removed#
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/