Re: "real" cameras in xsi

[Chris Shaw <cjdshaw.bulk(at)blueyonder.co.uk>]

OK, a number of errors there. The focal length is the lens size, which 
is probably 7mm. What you refer to as focal length is called the "focal 
distance" and isn't really relevant for FOV calculations. The 23.98 you 
mention is probably the frames per second (FPS). I'm guessing the camera 
you're referring to is actually the Sony HDW-F900H which, if you look up 
the specs, has a 2/3" chip. Have a look at this document to learn about 
chip sizes:
http://www.dpreview.com/learn/?/Glossary/Camera_System/Sensor_Sizes_01.htm
but basically, the filmback size you want is
8.8mm x 6.6mm
or
.3465" x .2598"

Sticking this into XSI along with your 7mm lens gives you a horizontal 
FOV of 64.311° - relatively wide angle. Does this sound right?

Chris

Gene Crucean wrote:
> Holy thread revival batman!
>
> I'm still a little confused by this stuff (I know I know). So in boujou, 
> it wants the film back size (which I don't have, but I know it was shot 
> on a Sony HDW-5900H), and the focal length which is 3'2". I tried 
> searching on the web for the film back size of that camera but no 
> information for that camera even comes up at all. So I guess my first 
> real question is does anyone know the FB size of that camera? The only 
> information that we have on the camera is the lens (7m which I'm 
> assuming is a typo meant to be mm), the foc which is 3'2" and the PSF 
> which is 23.98. Well and some other random info like height, tilt, 
> Tstop, roll etc.
>
> I ran a quick track on it without using the correct FB info and no 
> surprise it comes into xsi with a FOV of something like 12 (way off 
> visually). I'm a little confused with all this conversion stuff so any 
> input would be appreciated.
>
> Thanks guys

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