Camera matching using data

[Tim Saunders]

Can someone help me translate some verbiage to use when setting up my v-ray physical camera to match the specs of the camera used in the video/photography?

 

I am lining my shots with footage captured from the Inspire 1 (X3) camera. I was able to get the focal length in the files data which is 35mm. However, the film gate is not listed. I found these details on DP review.

 

The Inspire 1's camera system, dubbed the X3, features a Sony EXMOR 1/2.3-inch type sensor with an f/2.8 20mm equivalent lens. The lens uses 9 elements in 9 groups, and contains an aspherical element, along with anti-distortion and UV filters. The X3 is capable of capturing 12MP JPEG and DNG Raw files and offers three capture modes including single shooting, burst shooting (3/5/7 fps options), and time lapse. Video capabilities include HD and UHD 4K (4096 x 2160) recording at 30 fps

 

Does anyone know if any of those numbers translates to the film gate (mm) I should be entering in my v-ray camera's parameters?

[Tim Saunders]

It seams I may have figured out a match. I took the 2.3-inch =comments from the quote and converted that to MM (58.42mm). Now my camera is matching much better. not perfect, but much better.

[Ernest Burden III]

Welcome to the wormhole. Camera matching should be easy. Should be. Isn't always.

 

There is a great tool in Cinema4D to mach a camera, I use it all the time, from full scene work to furniture I have to build.

[Tim Saunders]

Thanks. I got the still preview lined up quite well. We'll see how things go when I import an animated camera.

[Corey Beaulieu]

I don't know your film gate exactly, but the specs say a 20mm is a 35mm equivalent so you are looking at a zoom factor of 1.75. You can leave the film gate alone and just use the zoom factor parameter with this information.

 

beyond that, Max 2015 and higher have a tool called Perspective Match that may help line things up more accurately and when used in tandem with the 2D zoom for your virewport, you should be able to get a really nice match.

 

I usually try to rough the camera in with a google earth image on a plane that is oriented and scaled properly to the building I am matching, but the perspective match tool should work regardless.