Matching film gate and focal length from real-world camera (v-ray)

[Rich O]

I often get photos from clients taken on all sorts of point n clicks/phones/etc

 

Am wondering what the proper workflow is to match real-world camera settings to V-ray camera settings.

 

eg I have an image from a Samsung Galaxy Note II, the only info provided in the meta-data is that is has a 4mm focal length. How does 35mm equivalent, crop factor, all fit into this?

 

Basically, what are the calculations I'd need to do to put the correct figures into V-ray's camera "film gate" and "focal length" settings?

[Chris MacDonald]

You need to find the sensor size for the note 2 and input that as the film gate, then the 4mm focal length will look correct.

 

[edit] From the info I found doing a quick search, the sensor size on it is 1/3", which is ~8.47mm. Try inputting that as the film gate, then setting the focal length to 4mm. It is worth noting that some of the literature I saw quoted it at having a 3.7mm focal length - best to try both to see which works best.

Edited December 9, 2013 by Macker

[Chris MacDonald]

My conversion might be off, actually. Based on this page;

 

http://www.gizmag.com/camera-sensor-size-guide/26684/pictures#1

 

The sensor size (film gate) you want is 4.54mm, not the 8.47mm I suggested.