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FreeTrack Forum > FreeTrack : English Forum > General Discussion > Sensor Width & Focal Length's?!

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sf4JC	#1 15/10/2008 - 17h01 Top
Class : Apprenti Posts : 22 Registered on : 10/09/2007 Off line	Just wondering if it's to much to ask, if someone can start a sticky thread on what values they are using in what webcam device? I believe I have found my focal length on the internet, but the Logitech site says they cannot give out the sensor width for given webcams. So I was just wondering if it was also a legal issue for someone not starting a thread already for giving sensor width and focal lengths of webcam devices they are using either from documentation or trial & error? Is this issue the problem that is causing the sensitivity issue in FSX? Anyone have any thoughts on this topic? sf4JC
sf4JC	#2 23/10/2008 - 18h34 Top
Class : Apprenti Posts : 22 Registered on : 10/09/2007 Off line	Is this of any importance, or maybe I should ask, is it important at all? I really need my sensor width figured out, and have no idea how to come up with that on my own. Can this be done mathimatically? if I can even do that?! Just wondering what anyones thoughts are on starting a thread, stating something like... Webcam : in my case, the Logitech QuickCam IM Sensor Width : unknown by me Focal Length : from what I got at Logitech site 4.0mm Did I miss anything? Scott (sf4JC) Edited by sf4JC on 23/10/2008 at 18h36.
potNpans	#3 18/12/2008 - 15h17 Top
Class : Apprenti Posts : 8 Registered on : 04/05/2008 Off line	Any camera buff's around to check, but sensor width I believe is determined by field of view you which to capture divided by taking the lower resolution (320x240 default for vx3000). Example 914.4mm(36inches approx. guess of led movement) div. 240 mult. by 2 = 7.62mm. Focal length would be determined by multiplying sensor size (240pixels =1/4inch=6.35mm default for vx3000) by working distance. I use the distance from camera to leds for distance value. Edited by potNpans on 18/12/2008 at 15h32.
sf4JC	#4 22/12/2008 - 21h10 Top
Class : Apprenti Posts : 22 Registered on : 10/09/2007 Off line	Thanks potNpans! I'll give those equations a whirl. I might have to remove a few cobwebs from my brain since last use . sf4JC

FreeTrack Forum > FreeTrack : English Forum > General Discussion > Sensor Width & Focal Length's?!

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