> 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 ... > Andrew Berge
OK , thanks . Makes total sense to me , now . The problem I was having with a camera that did not quite match was the 'Film W/H" . I don't know how much success I might have with tweaking it , but I'll give it a try and see what happens . > I did mention in that text that I changed the value to let it match > the real life camera. There's this diagram on the wiki which shows > the relation between fov and film width > I know it's a bit techy maybe > Arjo Hi Arjo , no it's not too techy but is actually a very good example, I think . I just missed it yesterday when I quickly scanned your tute . http://rs3dwiki.the-final.info/index.php?title=Real_life_and_3D_camera_matching Thanks for the replies . studio > 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 > >>> > >>> > >> -- > >> No virus found in this incoming message. > >> Checked by AVG Free Edition. > >> Version: 7.1.410 / Virus Database: 268.16.8/621 - Release Date: 1/9/2007 > >> > >> > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.410 / Virus Database: 268.16.8/621 - Release Date: 1/9/2007 > >
