The first 10-megapixel entry-level digital SLR to reach the market, the Sony
Alpha A100 raises the resolution bar in the sub-$900 category. While that makes
the camera particularly newsworthy, it's interesting in several other
respects. This model is a hybrid, combining the best of the Konica Minolta Maxxum
5D with entirely new Sony technology and features. As discussed in our First
Look report (August 2006 issue), the A100 is compatible with most Maxxum mount
lenses and certain flash units. But it takes a giant step forward with new features,
such as an ultra-fast BIONZ processor, improved Anti-Shake system, a unique
Dynamic Range Optimizer, two features that minimize sensor dust, superior LCD
monitor display, and significantly longer battery life.
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Design And Operation
Resembling the late lamented Konica Minolta Maxxum digital SLRs in general appearance,
menu items, and some controls, the A100 features different trim and a more handsome,
contoured body. This is a well-balanced, compact digital SLR with a large rubberized
handgrip and a large viewfinder that prevents a tunnel vision effect. It's
nicely finished with a scratch-resistant matte black exterior over polycarbonate
panels and a magnesium-alloy chassis. Not quite as petite/lightweight as the
EOS Digital Rebel XT, the Alpha A100 is quite portable and sports a 2.5"
wide view, anti-glare LCD monitor with oversized data numerals.
It's also remarkably versatile for an "entry-level" model
so it compares favorably with all other digital SLRs in its price range. Numerous
user selectable overrides allow for controlling virtually every aspect of an
image. While a reflex mirror lockup feature (available with the Digital Rebel
XT) is not available, experienced photographers will appreciate several advantages,
such as the fact that wireless, off-camera flash does not require an extra-cost
accessory. Set up a remote Maxxum D-series or Sony HVL flash unit and it will
be triggered by the burst of light from the built-in flash.
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the built-in stabilizer system is the most attractive feature, the
Alpha A100 is a highly desirable camera for many other reasons.
These include quick response, superlative image quality, fast recording
to a memory card, plus a wealth of highly advanced capabilities.
(At f/11 in Aperture Priority mode; ISO 100; JPEG Large/Fine capture.)
All Photos © 2006, Peter K. Burian, All Rights Reserved |
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The A100 sports relatively few buttons. Many of the frequently-used features
are selected by using the two large knobs on the camera's "shoulders."
That reduces the need to access the electronic menu with its numerous options,
multiple sections, and tedious navigation process. Sony adopted the menu devised
by Konica Minolta, but hopefully they'll develop a streamlined version
before introducing their next digital SLR. After the basic setup to meet personal
preferences, operation with the analog controls was quick, intuitive, and convenient.
Evaluation: In order to satisfy first-time digital SLR buyers,
this Sony camera can be simple to use with one of the six "intelligent"
subject-specific Programs. Even so, it will satisfy many experienced shooters
who will take advantage of the many overrides. In long-term use, I would miss
only two capabilities: a high-speed (5 fps) Burst mode and reflex mirror lockup
to minimize internal vibrations in macro photography.
Performance Evaluation
During extensive shooting the Sony Alpha A100 proved to be very competent. It
started up in about a 1/2 sec and was much quicker than average in buffer clearing:
writing data to a memory card. When using a high-speed CompactFlash card, I
was able to shoot dozens of large/fine JPEGs, or nine raw files, in a single
sequence. And even after a long burst, the camera was almost always ready to
take some more shots.
In most outdoor locations, autofocus was fast and reliable with static subjects.
In low light, focusing took up to a 1/2 sec but there was rarely a need for
the focus-assist feature, available only with flash. Continuous AF was also
fast, although the system was not always successful with subjects accelerating
at an erratic rate. I used the Sony 75-300mm f/4.5-5.6 zoom for action photography
and found that roughly 90 percent of my photos were sharply focused. Autofocus should be even faster and more reliable with one of the few Sony SSM lenses with Supersonic-Wave Motor or the similar (but discontinued) Maxxum SSM lenses.
The on-board Super SteadyShot stabilizer is an improved version of the Konica
Minolta system that shifts the entire CCD sensor module to compensate for camera
shake. While it took about a 1/2 sec to be fully active, the system ensured
that nearly all of my 1200 photos--made indoors and out without a tripod--are
acceptably sharp or razor sharp. This Anti-Shake mechanism should work with
nearly all compatible AF lenses but, as Sony indicates, it's less effective
when panning with moving subjects or in macro photography. The company also
recommends turning the stabilizer off when the A100 is mounted on a tripod,
a standard recommendation.
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