I apologize for the stupid question for a user who has never used English units, but I really can't find any connection.
I would like to know how Lightwave in Camera - Frame settings calculates that weird number in the box.
I understand the size of the digital camera sensor (1/3", 1", .... etc). But if I enter 1/3" for a CCD camera into any calculator (I get 0.333" and Lightwave shows 0.126"), I get a different number than the one that appears in the Frame field.
Click image for larger version. 

Name:	Screenshot_1.jpg 
Views:	16 
Size:	90.0 KB 
ID:	145661
So how do I specify a 1/2.8" Frame in Lightwave? (Smartphone Cameras)
And can I add more sensor sizes to Lightwave?