B. The search for speed
I believe we share the preoccupation!
It was annoying to find that the new features offered by UHS-1 Standard Memory cards are not implemented on the Canon SX50.
A review of the SX60 shows the speed of a camera with UHS-1 ability in continuous shooting mode:
To test the numbers I fitted the SX60 HS with a freshly formatted Sandisk Extreme Pro UHS-1 card, set it to its best quality JPEG mode and held the shutter down in continuous shooting mode. The SX60 fired off 200 frames at a what sounded like constant speed and would have continued until the card was filled had I not released the shutter. I timed the first 50 frames at at 6.3fps, just shy of the claimed 6.4fps. However the first 10 frames came in just shy of 7fps, so for shorter bursts the SX60 HS exceeds the published speed.
This is a massive improvement on the 2.2fps continuous shooting speed of the earlier SX50 HS and though that model's 10 frame 13fps High Speed Burst HQ mode has been dropped, it was always of limited use as it captured less than one second of action.
I've also googled how fast the best UHS-1 cards really are. These can be labeled as 95 MB/s fast, but numbers from laboratory tests can be misleading. Users have reported real-life tests as closer to 45 MB/s. That's roughly in the same range what the review above suggests: up to 3-4 times faster than the SX50 in continuous mode.
PS. Two photos taken from a hide in a wetland reservation, so I'd estimate via Google Maps that the Stonechat and the Reed bunting were 50 m away. The third and fourth were closer (30 m), a Water pipit (?). In all three cases I went into digital zoom (155x), auto mode.
Very average quality, I know. Maybe still of interest for non-owners of the SX50 to see how the camera handles distance shots.