jjon, thanks for the comprehensive review. The Alpha 520 HS certainly seems to pack a lot of punch in a small size.
My own Go-To pocket camera for many years was another diminutive Canon. Released five years before the 520, the TX1is only the size of a pack of cards, and is used in a pistol grip fashion. With a very robust metal body, into which the lens would completely retreat, behind a solid metal shield. From other peoples' experience, I understand it could withstand a drop onto concrete with only a scratch to show - though using the wrist strap alleviated that!
Its main disadvantages were a small (1.8"), low resolution (115,000 pixels) LCD screen: diminutive controls which some apparently fat-fingered impatient reviewers appeared unwilling to learn to use; and poor performance in dim light. But the screen did swivel, so could be held overhead to shoot over a crowd, or at ankle height without the need to lay on the ground, or around corners, or any crevices in machinery, etc. I could get my arm into, to get a shot of whatever was otherwise out of sight.
Despite the DPR's review statement that its macro focus range was 10cm, it would focus right down to the front of the lens - though that was of little use except for closeups of computer screens.
The zoom range, 39-390mm could also be increased, by x 1.9 (apparently by means of an internal lens shift ?) to a maximum of 741mm, with minimal deterioration, though with such a light weight, it was hard to use handheld at that range.
Stockholm's Stadhuset (Town Hall) tower, with the golden triple crown emblem is about 2.4 km distant. The Riddarholmskyrkan (Knight's Islet Church) unusual filigree spire is about 1.6 km away
Stockholm's Stadhuset (Town Hall) tower, with the golden triple crown emblem.
Close up shots could get very close...!

Notodontid (?) moth caterpillars (about 2 cm. long) on Eucalyptus leucoxylon spp
USA 5 cent coin
Computer screen with lens surround touching the screen
And because it was easy to select individual video frames, that proved a simple way to take acceptable shots of moving subjects.
A frame from a VGA video shot handheld
Cairo traffic. Bumper to bumper with jaywalkers, cars, trucks, busses, donkey carts, camels, tucktucks, cats, and horns. A frame from a VGA video shot handheld through a taxi window
Grandchildren's sport
And having such a small, versatile, with me all the time allowed me to snap pictures of almost anything that took my fancy - so long as the light was good.


When I snapped this, I didn't see the small Green Huntsman spider at the top right, nor the fly at the upper left.