
Here, I used my Vivitar 24mm F2.0 DIY tilt-shift, and zoomed in 14x on the top-left and then took a picture.
To activate MF Check LV, first press the MF Check LV button (duh) and then press the AEL/Zoom In button (instead of the Smart Teleconverter button). This might not make sense at first, but it does - you can zoom in and magnify either 7x or 14x, and optionally you can use the Smart Teleconverter up to 2x.

Unfortunately, it seems that the main sensor does not use SteadyShot in MF Check LV. Or maybe I was giving it too much of a challenge at
14x magnification!
It was of course, much easier to use with wider focal lengths.

Another very cool feature -
Face Detection. It finds the face and highlights it with a box. Here Smile Shutter is also on.
I love Smile Shutter - it's a fantastic party tool, and you can use it to take group pictures without using a remote control!
If you have a recent Sony Cybershot, you may already be familiar with the Smile bar on the left. Just tell the person to smile bigger and bigger until the bar reaches the arrow (on the left of the screen) and the camera will automatically take a picture.
You can set for
Slight Smile to trigger it easily. However, Smile Shutter is disabled when using an unchipped lens - what a pity, as I would love to put my Peleng 8mm F3.5 circular fisheye (M42 mount) on the A550, and leave it on the table facing up (or down) while capturing any smiles around the table automatically!

Face Detection sets the (nearest) AF point to the detected face, and adjusts exposure and white balance accordingly.
Top: Face Detection off; bottom: Face Detection on. Notice that while Face Detection did adjust exposure for the face, it did so conservatively in this case (2/3rds of a stop brighter.)

There is the fantastic
Dynamic Range Optimizer (Advanced and up to Level 5) that comes with the A700, A850 and A900 - you can dial it up to DRO Level 5 like in this picture!
However, it does have its weaknesses, as it tends to lower contrast.

There is the new
Auto HDR (up to 3 EV) mode. It takes
two shots successively, aligns them in-camera, and blends them like you would with a real HDR program! The color is a lot better than anything you could ever get out of DRO Level 5 which shows its weaknesses in certain conditions.
The Pentax K-7 version I have to say is slightly smarter - it flips the mirror up and just triggers the shutter repeatedly. On the A550, the mirror goes up and down twice, causing unnecessary vibration. However, the K-7 doesn't automatically align the images, while the A550 does!
It might simply not be possible for the A550's mirror to stay up while the shutter opens and closes - that is the most mechanical part of a dSLR.

Here's one from Auto HDR at 300mm. Just don't use Auto HDR for everything. (Try loading this in Photoshop and pulling the Levels - you'll find it quite easy to make this look natural again.)

And, of course, because 2 exposures are made, one after the other,
you should only use Auto HDR on subjects that are not moving!

What else is there, software-wise?
Top-left: Creative Styles do not include the Brightness or Zone Matching settings.
Top-right: High ISO NR has no Off setting (some might say it is a bad thing but I think they were trying to be honest that the CMOS does that on-chip anyway.)
Bottom-right: the lowest sensitivity is ISO200 instead of ISO100 as ISO200 is the base ISO for this 14.2 megapixel CMOS sensor, and they didn't resort to overexposing and bringing down the curves like how the A700/A850/A900 achieve ISO100 on a ISO200 base sensor.
Bottom-left: Auto HDR is disabled when shooting RAW or RAW+JPEG.
Wireless TTL flash is supported without ratio control, but it cannot use the Sony HVL-F58AM nor the Sony HVL-F20AM as a commander while attached to the A550. This was kinda expected of bodies lower than the A700, unfortunately.
This post has been edited by albnok: Oct 13 2009, 02:56 PM