Summary: The Sony Alpha SLT-A55 is an excellent alternative to a DSLR, acquiring most of their advantages, some unique abilities with very little downsides. Externally, the SLT-A55 is a lot like an entry-level DSLR, with a price to match. Its design though, which includes a translucent mirror, lets it perform phase-detect AF during exposures and video. No other ILC can shoot 1080p video while focusing so quickly.
Pros: Good resolution and sharpness, Lower than average image noise, Good color accuracy, Conservative metering, Speedy and accurate autofocus, Very effective image stabilization, Excellent large and detailed EVF, True exposure-priority Live-View, Fantastic Eye-Start sensor, Phase-Detect AF-C while recording video, AF-C during continuous drive up to 10 FPS, Excellent dual-axis digital-level, Fast and responsive, Nice build quality, Good ergonomics, protruding EVF, Phase-Det...
Cons: High-ISO softness due to, AWB struggles more than usual, Indistinct EC button, Tiny video crop-marks, 1s Delay starting video recording, 1s Delay stopping video recording, Eye-Start AF triggers too often, Delicate translucent mirror, Gap below mirror lets dust in, No way to use 1/2 EV stops, Histogram and level views show little info, Difficult Sweep Panorama framing, GPS not so reliable, Weak LCD hinge
Summary: As you have likely gathered by now, I think the Sony A55 is a great entry-level camera. Those who love the ability to frame photos using the live view display won’t find a more capable DSLR-type camera than the A55. And, if you are stepping up from a point and shoot camera, you’ll feel right at home with the A55’s user-friendly display and autofocus features.
Summary: The Sony SLT-A55 is an excellent all-rounder with a comprehensive feature set. The translucent mirror technology gives it an innovative touch and the best live view AF on the market. Continuous-shooting performance is the best in its class--just don't plan on shooting the Olympics with it.
Pros: Reliably good image quality at lower sensitivities, High ISO JPEG output usable up to ISO 12800 for smaller prints, Excellent LCD and good EVF, with efficient automatic switch., Versatile and capable (for its class) 15-point AF system, Accurate metering and focus, Very Good JPEG resolution, Very good (almost 9EV) dynamic range, Good quality HD video output, Swivel-screen useful for overhead- and video shooting, Good ergonomics all around, good build quality, nice hand...
Cons: Limited control in 10fps and movie modes, AF system not quite up to capturing fast action, No live view in 10fps/6fps shooting makes panning almost impossible, Slow (50 seconds) buffer clear time (RAW-mode), Little control over high ISO noise reduction in JPEG mode ('auto' or 'weak'), Visible loss of detail at anything over ISO 400 in JPEG mode (noise reduction too strong), Menu system a little confusing (hard to orientate yourself sometimes), 'Ghosting' can be an iss...
Conclusion: The Sony Alpha 55 (SLT-A55VL) offers faster-than-D-SLR focusing speeds along with D-SLR-quality images. The only thing you don't get is a true optical viewfinder.
Pros: Excellent image quality. Extremely fast autofocusing in any mode. Continuous autofocus when recording video. Easy-to-use interface. High-quality LCD. GPS. HD video capture at 1080i60 in AVCHD (17Mbps). Choice of HD video codecs.
Cons: No optical viewfinder. Single-focus autofocus not available while recording video. No control over aperture and shutter speed while recording video. Audible lens noise in video capture.
Conclusion: Tech specs Price US$1,210 with lens Dimensions 124x92x87mm LCD Size 3in Maximum movie resolution 1080i Megapixels 16.2MP Memory card type SD(HC/XC)/Memory Stick Optical viewfinder No Weight 441g Zoom function during movies Yes
Excerpt: Today, Sony introduced two new interchangeable lens cameras —with a twist. Unlike the usual DSLRs, with mirrors that flip up during shooting to allow light to strike the sensor, the A55 and A33 use "Translucent Mirror Technology." In place of a mirror, there's a fixed film that's reflective enough to direct light to the autofocus sensor while simultaneously transmitting light to the image sensor behind it.
Summary: At the £700 price point there’s nothing else on the market that can match the 10fps continuous focus – a notable benefit of the SLT technology that even out-performs (in terms of speed, at least) the Nikon D300s. However, there are some fairly big differences in the level of control the A55 offers compared to what a professional DSLR can provide, but the difference in prices more than justifies this.
Pros: Super-fast continuous focus burst shooting, GPS, excellent 1080i, HD movie autofocus
Conclusion: Sony Alpha 55 system camera The Sony Alpha SLT-A55 is a remarkable camera. Not only due to its compact dimensions, as there are even smaller cameras available, but more because of its design. The current series of digital SLR cameras on the market is based on an ‘old’ technology and although in terms of functions and image solutions, much has changed, the way in which the camera works has not even seen such a revolution.