First, its battery life is outstanding. I shot shot more than 650 photos with the flash, most of them bouncing off the tall ceiling, with only ONE set of 4 AA batteries.
Compared to the 420EX, the advantages are huge. The recycling time is amazingly fast. It reminded me of the time the shutted lag difference I noticed when I switched from a compact digital camera to a digital SLR! You can even burst the flash for half a dozen of exposures (bounced off ceiling!) in 2 seconds (interesting for the garter throw!), to match the speed of the Canon 20D or 30D.
The quality of the TTL exposures is also singificantly better than what I would get with the 420EX. 95% of my shots were spot on, using full TTL mode. It is consistently excellent.
The fact that you only need to press one button to move the head of the flash in all directions was what sold me on the 580. What a pleasure to be able to switch from landscape to portrait and still be able to bounce the flash! This simple operation took 3+ seconds on the 420, and only 1 second on this one, which is the difference between getting the shot or missing it (or just giving up trying to get a vertical shot with the flash). The light reflector is also a nice feature, to get a catchlight in your subjects' eyes. However, it won't work if you shoot in portrait mode (will reflect off to the right side).
But the ONE feature that is worth the upgrade alone is the hot shoes quick release mount. Just slide the lever to the right, it clips right into position and is securely mounted on the hot shoe. It is of course just as easy to unmount the flash.
One other very nice feature is the direct access to "second curtain flash", simply by pressing a button on the flash. No need to go wandering into the Cn functions of the camera body!
On the down side, the flash is a lot bigger and bulkier than the 420EX, although not that much heavier. It is a little more difficult to fit it in my camera bag now. It is longer, wider and deeper. The only way to really be able to tell is to have it in your hands. Comparative photos won't really do a good job at showing the difference in size. That said, I had it mounted on my camera the whole day, for more than 8 hours, and it never bothered me.
I haven't even scratched the surface of everything that this flash can do, manual mode, etc, since I got it 2 days before the wedding and didn't have time to explore its features. I can't compare it to the 580EX mark I either, since I am coming from the 420. But if you're in the market to upgrade your flash, don't look twice, and get the mark II right away.
To sum things up, I would say that this flash is worth every penny, and well worth the price premium compared to the 420EX. It beats it hands down in every single category, has an outstanding battery life, and is completely silent (I forgot to mention that). I am not a professional, just an enthusiast, but I can definitely justify its cost, at my level. In other words, you don't need to pair it to a 5D or a 1D Mark III to notice how much better than the 420EX it performs.
See more reviews about: Canon Speedlite 580EX II Flash for Canon EOS Digital SLR Cameras
This battery grip transforms an already excellent camera (the Canon 450D -- or Rebel XSi as it is called in the US) into a great one. First of all, the grip is excellently designed, and people with medium to large hands like me can get a much better handle on the camera which, although nicely shaped, was a bit to small for my liking. Now, with the grip, this is transformed into a natural fit (it now feels similar to the Nikon D70, which I thought to be more comfortable to hold than the 450D). The advantages of using this grip are many:
First of all, you have double the amount of battery power available (provided, of course, you purchase an additional battery pack. The package does not contain any batteries). The grip is designed to hold one or two of the 450D's battery packs at the same time. You do not have to use two packs. If you do, the packs do not have to carry the same amount of charge, and both packs are drained simultaneously. Even better, Canon has designed the grip to house a sled-like device they call 'magazine'. This magazine holds one or two battery packs. The nice thing, however, is that it comes with a second magazine designed to hold 6 AA batteries. In a pinch, this can bridge the gap until you can re-charge the packs. Also, you can replace the magazine with an adapter to connect your camera to a normal power outlet (this is not included in the package). The magazine slides in from the left side (as seen from the camera's back), making exchanging the magazines slightly awkward for right-handed people.
The grip is designed to slide into your camera from below, replacing the battery pack (you'll have to remove the battery cover for this), and is secured in place with a screw. If there is room for improvement, then it would be here: I'd have liked a rubber environmental seal to better protect the camera's now permanently open battery housing.
The grip almost doubles the weight of the camera, making it much better balanced with many of the larger lenses (e.g. the EF 100 Macro lens). Even better, when shooting in portrait orientaton, the grip provides its own shutter, aperture, AF lock and AF select buttons as well as another selector dial. To prevent accidental use of these buttons, the grip is also equipped with an ON/OFF switch (this switch will not operate the battery power). This is in addition to the large, separately molded grip now provided for this orientation. The bottom also houses a replicated tripod socket, and a mount for the handstrap. The latter is very useful, as I have found myself shooting more in portrait orientation, and have now set up the camera to use this as the default orientation.
The few small flaws I've found are this: I would have liked the ability of the grip to be able to also provide power to my (external) flash. Even more than that I would have welcomed a charger for the whole grip. Currently, you have to remove the battery packs from the magazine, charge them separately, and then re-insert them into the magazine, then insert the magazine into the grip. Also, you have to remove the camera's battery cover from the camera -- this forces you to carry the cover with you seperately should you want to use the camera without the grip. Finally, I would have preferred a slightly better environmental sealing than the rudimentary one that is provided. All things considered, though, these are small annoyances compared to the much better handling and feel the grip brings to the camera.
To sum up:
This grip truly incrases the 450D's already great features. I like the fact that I can choose to use one or two packs, and even swap them for AA batteries in a pinch. The whole assembly feels much improved, and shooting in portrait orientation has been immensely enhanced (both in feel and simplicity). I recommend this grip for anyone who wants to get more out of this camera, and especially for those who find themselves shooting often in portrait orientation.
See more reviews about: Canon BG-E5 Battery Grip for Canon XSi Digital SLR Cameras
