The Powershot SX50HS was released on Sept 17 2012
CHDK is not available for the Powershot SX50 HS yet
Reviews and Specifications
The use of ver.req to determine your firmare version may not work. It is recommended you use the ACID utility to determine your firmware version.
The ver.req file method is used to gather firmware information about this camera model.
Europe Version Header:
Canon PowerShot SX50 HS P-ID: 3259 PAL D Fimrware Ver GM1.00B (18.104.22.168) Adj Ver.009.010
DryOS operating system (ver 2.3 Rev #51)
Download location for firmware dumps:
SX50 porting thread: http://chdk.setepontos.com/index.php?topic=8932.0