[ptx] Getting EXIF data from coolpix 950 jpgs using hugin

[Thomas Steiner]

> I think it's easier to get it from the ratio between the focal length 
>  of the lens and the 35mm equivalent of it. Not many catalogues do 
> not  state the CCD size anyway.

The crop factor of my Canon EOS 350D should be exactly 1.6, but hugin
overestimates (some percents) it a bit (and missestimates the facal 
lenths then
as well). Why? What can i do against this?
Thomas