Olympus SP-820UZ vs Sony A58: A Deep Dive to Guide Your Camera Choice

Choosing your next camera is an exciting but sometimes overwhelming adventure, especially when deciding between very different models like the Olympus SP-820UZ and the Sony A58. These two cameras occupy distinct categories: the Olympus SP-820UZ is a superzoom compact designed for convenience and extreme reach, while the Sony A58 is an entry-level DSLR geared towards more serious photographers seeking manual controls and interchangeable lenses.

Drawing on years of hands-on testing and analysis, we’ll take a comprehensive look at how these cameras compare across core photography genres, real-world use, and technical capabilities. Our goal is to equip you with practical insights so you can confidently select the camera that best fits your style, budget, and ambitions.

First Impressions: Size, Handling, and Physical Design

When you pick up the Olympus SP-820UZ and the Sony A58 side-by-side, the sheer design philosophy difference jumps out immediately.

The Olympus SP-820UZ is a compact superzoom camera with a 40x zoom lens built-in. It’s designed for users who want a huge focal length range without the hassle of changing lenses. Physically, it measures roughly 117 x 78 x 93 mm and weighs around 485 grams, positioning it slightly bulkier than typical compact cameras but still easy to carry around daily.

The Sony A58, an entry-level DSLR-style camera, is larger and bulkier at 129 x 95 x 78 mm and 492 grams, including the body only - lenses will add to that. It mimics the ergonomics of a more traditional SLR, offering a deep handgrip and lots of buttons for tactile control.

Key Takeaway:
If portability and an all-in-one zoom solution appeal most, the Olympus’s smaller, lightweight design is a clear advantage. However, if you prefer manual controls, a traditional DSLR feel, and are comfortable carrying lenses, Sony’s more substantial form factor will likely feel familiar and ergonomic.

Under the Hood: Sensor and Image Quality

Central to a camera’s image quality is its sensor size and technology, and here we see the most significant technical divergence between the two.

The Olympus SP-820UZ features a 1/2.3-inch CMOS sensor - a small sensor typical for compact zoom cameras, measuring just 6.17x4.55 mm with a surface area of 28.07 mm², and offering 14 megapixels of resolution.

In comparison, the Sony A58 sports a much larger APS-C CMOS sensor measuring 23.2x15.4 mm - over 12 times larger in surface area - and a resolution of 20 megapixels.

Why this matters:
Sensor size translates directly into image quality, dynamic range, low-light performance, and depth-of-field control. The A58’s larger sensor size delivers:

• Better dynamic range, preserving highlight and shadow details.
• Superior high ISO performance, meaning cleaner images in low light.
• Higher resolution allowing for larger prints and cropping flexibility.
• Shallower depth of field for creamy bokeh in portraits and selective focus.

The Olympus’s small sensor limits its overall image quality and depth-of-field control but maintains decent performance for bright, daylight shooting and situations where zoom reach is essential.

Viewing Your Shots: Screen and Viewfinder

Reviewing your composition and images impacts your shooting experience significantly.

The Olympus SP-820UZ provides a fixed 3-inch TFT LCD with a 460k-dot resolution but lacks any viewfinder, optical or electronic.

The Sony A58 offers a 2.7-inch tilting LCD, also 460k-dot resolution, plus a key advantage: an electronic viewfinder (EVF) with 1.44 million dots, 100% coverage, and 0.65x magnification. The EVF lets you shoot in bright sunlight and track fast-moving subjects with immediate exposure feedback.

User Impact:
If you frequently shoot outdoors in bright light, the A58’s EVF gives you a clear edge. The tilting rear screen is also beneficial for creative angles. The Olympus’s fixed screen and lack of viewfinder push it toward more casual or point-and-shoot photography use.

Lens and Zoom: Reach vs. Versatility

The Olympus SP-820UZ’s headline feature is its staggering 40x optical zoom lens covering 22mm wide to 896mm telephoto equivalent (in 35mm terms), designed for ultimate reach in a fixed-lens camera.

The Sony A58 uses the Sony/Minolta Alpha mount, supporting a broad lens ecosystem including 143 native lenses spanning ultra-wide, primes, macros, and telephotos. The camera itself doesn’t have a native zoom lens - it’s dependent on the lens you attach, with a 1.6x crop factor to consider.

How to interpret this:
The Olympus is unbeatable if you want extreme zoom without carrying lenses. From wide landscapes to distant wildlife, the 40x zoom gives instant versatility.

The Sony’s strength is in supporting high-quality lenses optimized for specific purposes: fast primes for portraits, macro lenses for close-up, high-end telephotos for wildlife, or wide zooms for landscapes. This flexibility suits photographers ready to invest in a system for diverse genres.

Autofocus and Shooting Speed: Tracking Moving Subjects

The Olympus SP-820UZ’s autofocus utilizes contrast detection systems, supports face detection, and has multi-area AF. However, it lacks continuous autofocus and advanced tracking. Its continuous shooting speed is modest at 2 fps, limiting capacity for action sequences.

The Sony A58 features a hybrid autofocus system with phase detection and contrast detection, 15 focus points (3 cross-type), face detection, and tracking capabilities. Moreover, it delivers up to 8 fps burst shooting - four times the Olympus’s speed - ideal for sports and wildlife action capture.

Practical implication:
For fast-paced photography such as sports, wildlife, or street scenes requiring quick, reliable focus and burst capability, the Sony A58 is the clear winner.

The Olympus excels in casual or static photography scenarios where extreme zoom reach is prioritized over speed.

Image Stabilization and Shutter Systems

Surprisingly, the Olympus SP-820UZ does not offer any image stabilization system, a notable omission given its long zoom range where camera shake is amplified.

Conversely, the Sony A58 provides sensor-based stabilization. This built-in system stabilizes attached lenses regardless of whether they have built-in stabilization, crucial for handheld shots at telephoto lengths and low shutter speeds.

Shutter speed ranges also differ: Olympus handles from 1/2000s to 4 seconds, whereas the Sony extends further with 1/4000s to 30 seconds, providing more exposure flexibility.

What this means
Without stabilization, Olympus users must rely on high shutter speeds or tripods, especially at the telephoto end, limiting low-light performance with zoom.

Sony’s IBIS gives greater creative freedom handheld and improves image sharpness across a wider range of conditions.

Video Capabilities: From Family Moments to Vlogging

Both cameras record Full HD video at 1920×1080 resolution, but their video feature sets differ.

The Olympus SP-820UZ shoots full HD at 30 fps with MPEG-4 and H.264 compression and supports reduced resolutions with high frame rates (up to 240 fps at low resolution) for slow-motion playback. However, it lacks external microphone input and electronic stabilization, resulting in limited audio and shake control.

The Sony A58 offers Full HD 1080p video with AVCHD and MPEG-4 formats, includes an external microphone port for better sound recording, and benefits from sensor-based stabilization during video capture.

Insights for videographers:
If you prioritize video with decent audio control and shake correction for run-and-gun shooting, the Sony A58 is a more capable platform.

Casual video shooters who find occasional slow-motion fun may appreciate the Olympus’s high-frame-rate modes but should temper expectations on audio quality.

Exploring Photography Styles: How Each Camera Performs Across Genres

Let’s step through how these cameras serve a range of popular photography types, helping you pinpoint which aligns best with your creative direction.

Portrait Photography

Portraits require pleasing skin tones, effective bokeh, and accurate focus on the eyes.

• Olympus SP-820UZ: Its small sensor yields strong depth of field throughout the zoom range, making it challenging to isolate subjects with creamy background blur. Face detection AF helps nail focus on faces but there’s no eye AF or continuous tracking.

• Sony A58: Larger sensor and ability to use fast prime lenses enable professional-level background separation and skin tone rendering. The hybrid AF system includes face detection, and autofocus tracking excels for candid portraits.

Recommendation: For portrait enthusiasts seeking artistic control and bokeh, the Sony A58 has a solid advantage.

Landscape Photography

Dynamic range, resolution, and weather resilience matter here.

• Olympus SP-820UZ: Adequate 14MP resolution but limited dynamic range typical of small sensors. No weather sealing means extra care required in rough environments.

• Sony A58: Employs a larger APS-C sensor with significantly better dynamic range and 20MP resolution, capturing finer details and tonal gradations. However, it lacks professional weather sealing.

Despite this, the Sony’s RAW support and lens interchangeability favor serious landscape work.

Wildlife Photography

Requires fast, accurate AF, long lenses, and good burst rates.

• Olympus SP-820UZ: The built-in 896mm-equivalent lens provides exceptional reach, but slow continuous shooting and basic AF limit capturing fast wildlife action.

• Sony A58: Supports long telephoto lenses with superior autofocus and 8 fps burst, critical to tracking animals in motion, though you must invest in suitable glass.

Sports Photography

Similar to wildlife, fast FPS, tracking, and low light capacity matter.

• Olympus’s lagging burst rate and AF make it less suitable here.

• Sony’s hybrid AF, fast burst, and higher max ISO provide much better performance.

Street Photography

Discreteness, quick AF, and portability are key.

• Olympus’s compact form and silent shooting modes favor low-profile street capture but no silent shutter limits stealth.

• Sony’s DSLR style is bulkier and noisier but faster AF tracking and more manual controls can aid quick adjustments.

Macro Photography

• Olympus’s 1 cm macro mode enables close focusing, suitable for beginners.

• Sony depends on external macro lenses offering more precision and quality but at a cost.

Night and Astro Photography

High ISO performance and longer exposures are essential.

• Sony’s larger sensor and extended shutter range make it superior for low-light and astro photography.

• Olympus’s ISO 6400 max native ISO offers noise, but limited exposure time and sensor size hinder performance.

Travel Photography

You want a balance of versatility, size, and battery life.

• Olympus wins on size and convenience with all-in-one zoom, though lacks image stabilization and physical toughness.

• Sony offers higher quality images and lens options but at bulk and cost of lenses.

Professional Work

Sony’s RAW support, manual modes, and system flexibility suit advanced workflows, while Olympus’s JPEG-only output and limited manual features constrain professional use.

Controls, User Interface, and Ergonomics in Practice

The Olympus SP-820UZ is straightforward, lacking manual exposure modes and physical dials, aimed at point-and-shoot ease. It has no touchscreen or illuminated buttons, with menus catering to beginners. The fixed rear screen limits compositional options.

The Sony A58, with dedicated exposure modes (Manual, Aperture and Shutter priority), customizable buttons, and a tilting screen, affords more creative control.

Battery Life and Storage Options

• Olympus SP-820UZ: Battery life is unspecified, typical for compacts is modest. Storage via SD/SDHC/SDXC cards.

• Sony A58: Rated for up to 690 shots per charge, impressive for an APS-C DSLR. Supports SD and proprietary Memory Stick cards.

This makes the Sony more reliable for longer shoots without frequent recharging.

Connectivity and Extras

Neither camera includes Wi-Fi or Bluetooth, limiting instant sharing options. The Sony A58 supports Eye-Fi card integration for some wireless file transfer.

Sony includes USB 2.0 and HDMI output, while Olympus only offers USB 2.0.

Pricing and Value Considerations

• Olympus SP-820UZ retailed around $299. It remains an economical, simple solution with physical zoom reach.

• Sony A58 is priced approximately $645 at launch, reflecting its advanced sensor, AF, and lens system.

From a value perspective, the Olympus provides a strong zoom lens and good image quality at a modest investment, ideal for casual shooters. The Sony demands more spending but pays back with superior image quality, faster operation, and system expandability.

Cameras in Action: Sample Image Comparison

Olympus SP 820UZ front Olympus SP 820UZ screen back Sony A58 front Sony A58 screen back

Comparing samples shows:

• Sony’s images reveal greater detail, better colors, and smoother gradations.

• Olympus performs well in good light but images soften noticeably at high zoom or low light.

Performance Scores at a Glance

Sony A58’s higher scores in image quality, autofocus, speed, and video underline its more advanced technology.

Where Each Shines Across Photography Genres

Clear leadership for Sony A58 in portraits, sports, wildlife, landscapes, and low light. Olympus SP-820UZ shines in travel and casual zoom-based photography.

Final Verdict: Which Camera Should You Choose?

Choose the Olympus SP-820UZ if you:

• Cherish extreme zoom in one compact package without changing lenses.
• Prefer point-and-shoot simplicity with automatic modes.
• Are budget-conscious and want a versatile travel companion.
• Mostly shoot in good lighting and don’t need high-speed AF or RAW files.
• Want occasional video with slow-motion features.

Opt for the Sony A58 if you:

• Demand superior image quality from an APS-C sensor and RAW shooting.
• Want manual control over exposure and photographic settings.
• Shoot action, wildlife, sports, or portraits needing fast AF and high burst rates.
• See yourself investing over time in lenses and a system.
• Need better video with external microphone support and stabilization.
• Desire longer battery life and more robust professional tools.

Wrapping Up: Embrace Your Photography Journey

Both cameras reflect different philosophies and user priorities. The Olympus SP-820UZ is an honest all-rounder with a monster zoom lens that suits travelers and casual photographers hungry for reach and ease of use.

Meanwhile, the Sony A58 represents a more serious entry into DSLR-style photography, offering the flexibility, speed, and power enthusiasts crave, rewarding longer-term commitment to the craft.

We encourage you to test both in hand and consider your photographic goals carefully. Whether you seek an ultra-zoom compact or an advanced DSLR system, either camera can serve as a gateway to discovering and expressing your creative vision.

Next Steps

• Check out local stores for hands-on feel.
• Explore third-party lenses if opting for Sony.
• Invest in quality memory cards and spare batteries.
• Experiment with manual modes on the A58 or the Olympus’s scene modes.
• Join online forums and photo communities for tailored tips.

Photography is a journey - choose the gear that inspires and supports your unique path.

Happy shooting!