S.O.: Ubuntu 14.04 64Bits
Graphic: Intel GMA HD Graphics 2000
version: 2.77 (sub 0), branch: master, commit date: 2016-04-05 18:12, hash: abf6f08, type: Release
**Short description of error**
The render/preview (in camera view) doesn't have the proportion like 3D camera viw.
**Exact steps for others to reproduce the error**
Based on a (as simple as possible) attached .blend file with minimum amount of steps
1. Open Blender.
2. Change to Render Cycles
3. Change to camer view (Numpad 0).
4. go to Render Properties, and change to other dimention. (example: TV NTSC 16:9)
5. in 3D view (Press Shif + Z) and see.
Note: Test with others dimentions.
I'm sorry for my bad english.