Review says decent. Canon PowerShot SX50 HS Review: Digital Photography Review
But you should go to the shops and test on your own.
Canon catalog say G15 is fast... but when i do the below, it is slow..
i try to take ceiling fan moving speed 2 out of 3
the final photo capture blur.
when i use mirrorless with flash, it is sharp.
if SX50 can achieve the taking of ceiling fan.. then it will be a perfect camera for me.