"Benny" <no spam ple@se.com> wrote in message
news:ijUvj.18311$421.1251@news-server.bigpond.net.au...
>I have created a panorama using about 6 images all taken using a 17mm lense
>(with a Canon 40D).
>
> At a later date I went and took some more shots (from the same
> position/location) but with focal lengths of 35mm and 50mm.
> I now want to add these extra images into the original panorama without
> them looking disproportionate or appearing to have better or worse
> resolution.
>
> What is the math I should be applying to ensure I get the extra images at
> the same proportions as the panorama and also preferably at the same
> printable resolution?
>
> My idea is that the 50mm images will need to be reduced in size to 17/50
> (ie 0.34) to fit correctly into the panorama. The 35mm images would be
> reduced to 17/35 (ie about half) to fit into the panorama etc etc.
>
> Not too sure what to do to ensure a consistency in printable resolution by
> mixing images (of differing focal lengths) in this way.

The focal length is not an issue - what matters is that you took the images
from the same location. You are correct about the change in image size.

One consequence of this is that you will need to double (or triple) up in
the vertical direction to match the field of view of your original pano, and
there will be keystoning issues because the vertical axis has changed. To
deal with that, you could get by with the transform tool, but a tool such as
PTGUI might save you a lot of time, since it known how to align images in
spite of this rectilinear distortion.

Another issue that you will almost certainly need to deal with will be color
matching the sky and other objects in the panorama. One way to do this is
with curves, and numeric values from the info palette. Again, a panorama
savvy program may save you some effort here, though you can do this
perfectly well manually with a little effort.
--
Mike Russell - www.curvemeister.com