Hi Garry,
This is all basic real world camera stuff, the focal length of a lens is
directly proportional to its angle of view, they cant be separated,
however there is a third variable to consider, which you can adjust and
that is the width of the pickup device
or film size.. you will see that if you adjust the film width in
realsoft you are changing the focal length of the lens without changing
the angle of view.
beware however, for any given film size or pickup device sixe the
angle of view and focal length ARE fixed you cant simply dial in
whatever you want by playing with the film width it wont be
correct..another thing.. playing with the film width setting in realsoft
i think makes the cameras in realsoft a little bit tempremental, do it
very carefully and also from my quick play just now it seems that it
gets particularly upset if you let the view angle or the focal length
drop to zero, perhaps a rounding bug error or st.
hope this explains a little,
Andrew
This is reall
studio wrote:
Hi Garry,
Maybe have a look at the camera matching tutorial I put on the wiki.
It will show that it's logical that these values are connected.
Arjo.
Hi Arjo :
Nice still image tutorial . However , I think those camera controls
should be connected but only once you have decided exactly what kind
of lens you have or need .
For instance , your camera in the tutorial has :
Focal Length - 48.25
View Angle' - 10.4
Scale - 5.4
but I have a camera of :
Focal Length - 48.25
View Angle' - 34.4
Scale - 1.64
It appears to be impossible for me to change my current
project's camera into a camera of your settings (for example
purposes only) . If I change one setting the other 2 settings
change too .
It appears that I can't get there from here , and if so ,
how ? The only way that I can see is if you save your camera
as an object and send it to me . There must be a better way
but I can't see how one would manage it , unless I'm missing
the obvious .
Thanks
studio
Trying to do some basic camera matching but it appears
that changing one camera control automatically changes
other corresponding controls .
I want to change just the 'Focal Length' but 'View
Angle' changes as well as 'Scale' . One would almost
think that there is only one camera in the entire
world and it has these settings , but the need to
adjust 'Focal Length' separately is critical .
When I import from Icarus or the Syntheyes demo
java script a camera is set up , but what if it's
not perfect and I need to adjust it slightly to
match perspectives ?
Thanks
studio
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