Canon PowerShot S100 vs. Olympus PEN E-P2: A Detailed Comparison for Discerning Photographers

Selecting a camera that balances image quality, versatility, and user experience remains a critical challenge for photography enthusiasts and professionals alike. While the Canon PowerShot S100 and Olympus PEN E-P2 originate from different camera classes - a compact advanced point-and-shoot versus an entry-level mirrorless interchangeable lens system - both represent influential models launched within a close timeframe. This comparison provides a thorough, experience-based examination of their technical specifications, real-world performance, and suitability across diverse photographic disciplines.

With over 15 years of hands-on testing across hundreds of cameras, this article offers an authoritative, data-driven assessment drawn from direct usage, imaging science, and ergonomic evaluation. It aims to equip prospective purchasers with a nuanced understanding grounded in industry-standard metrics and practical application.

Design and Ergonomics: Compact Convenience vs. Mirrorless Versatility

Physically, the Canon S100 is a pocketable compact with dimensions of 99 x 60 x 28 mm and a lightweight 198 g body, designed primarily for portability. Its fixed lens architecture and simplified control layout reflect a user-centric approach for casual yet advanced photography. Conversely, the Olympus E-P2 occupies a larger footprint (121 x 70 x 36 mm) and weighs 355 g, embodying a traditional rangefinder-style mirrorless form factor that accommodates interchangeable Micro Four Thirds lenses.

From an ergonomic perspective, the S100's compactness makes it instantly accessible for travel and street photography. Its fixed lens system, though inherently limiting zoom flexibility, ensures consistent optical performance without the complication of lens changes. The E-P2’s design favors modularity - the heft is justified by greater system adaptability and potential for professional use with a comprehensive 107-lens ecosystem.

The top view comparison reveals the Canon's minimalist control arrangement optimal for point-and-shoot users, while the Olympus incorporates dedicated dials and customizable buttons useful for manual-focused enthusiasts seeking quick parameter adjustments:

Nevertheless, the E-P2’s 3-inch HyperCrystal LCD offers only 230k-dot resolution, inferior in sharpness to the S100’s 461k-dot screen, impacting live view precision and playback review:

In sum, the S100 excels at size-constrained shooting scenarios, whereas the E-P2 caters better to photographers prioritizing control extensibility and lens versatility.

Sensor and Image Quality: Small Sensor Compact vs. Four Thirds Advantage

At the heart of photographic output lies sensor technology. The S100 employs a relatively modest 1/1.7" CMOS sensor, measuring 7.44 x 5.58 mm, equivalent to a 41.52 mm² capture area. Though advanced for compact standards, this sensor underperforms in comparison with the Olympus E-P2’s larger Four Thirds CMOS sensor (17.3 x 13 mm; 224.9 mm²), which is more than five times the surface area.

This sensor size disparity translates into fundamental differences in image quality parameters:

• Resolution: Both deliver 12 MP native resolution, but the E-P2’s larger pixels accommodate improved light-gathering capacity.
• Dynamic Range: The S100 scores 11.6 EV on DxOMark measurements, while the E-P2 measures 10.4 EV, indicating the Canon slightly edges dynamic range, likely due to newer DIGIC 5 processing optimizations.
• Color Depth: The Olympus leads with 21.5 bits vs. 20.7 bits for the Canon, suggesting more nuanced color reproduction.
• Low Light ISO Performance: The E-P2's superior native ISO performance (505 DxOMark low light score vs. 153 for the S100) provides cleaner images at higher sensitivities, vital for dim environments.

In practical terms, the E-P2 achieves superior noise control and tonal gradation at higher ISOs (above ISO 800), which benefits applications like indoor event photography, astrophotography, or low-light street scenes. However, the S100’s sensor integrated with the DIGIC 5 engine delivers punchy colors and high-quality output in daylight conditions, making it well-suited for casual portraits and daylight landscapes.

Autofocus Systems and Performance: Precision versus Speed

Focusing reliability is a dealbreaker for many photographers, especially in action, wildlife, and street contexts. The S100 offers a 9-point contrast-detection autofocus system with face detection but lacks continuous AF tracking, limiting its usability in fast-moving subjects. Single AF mode is available, accompanied by center-weighted and multi-area focus selections.

The Olympus E-P2 has an 11-point contrast-detection AF system, including selective area focus and continuous autofocus modes. While the system does not include phase detection (common at the time), its contrast detection implementation is smoother, augmented by a stronger processor, yielding faster focus lock and a modest burst rate of 3 frames per second, compared to the S100’s 2 fps.

Neither camera offers advanced eye or animal-eye detection autofocus, which reflects their generational context. For still subjects and street photography, both cameras suffice; however, the E-P2’s continuous AF offers better tracking for casual sports and wildlife shooting, albeit with some limitations for rapid subjects.

Lens Ecosystem and Magnification: Fixed Convenience vs. Interchangeable System

The Canon S100’s fixed zoom lens covers a 24-120 mm equivalent focal range with a variable aperture of f/2.0–5.9. Its wide-angle (24 mm) with fast aperture is commendable for low-light environments and environmental portraits, while the telephoto end is moderately useful for general-purpose zoom.

In contrast, the Olympus E-P2 leverages the Micro Four Thirds mount, enabling access to a substantial and continually expanding lens library encompassing primes, zooms, macros, and specialty optics. The 2.1x crop factor of its sensor offers equivalency in reach with smaller lenses compared to APS-C and full-frame mounts. Users can select lenses tailored for macro, telephoto, or wide-angle specialties, allowing professional-grade optical performance and creative control via aperture and depth of field manipulations absent in fixed lens designs.

This flexibility significantly increases the E-P2’s practicality across multiple photographic genres:

• Macro Photography: Olympus users have access to high-precision focusing lenses and stabilization for close-up work that the S100’s built-in lens cannot match.
• Portraits: Fast portrait primes with wide apertures enable superior bokeh and subject isolation beyond the fixed S100 lens.
• Wildlife and Sports: Telephoto zoom lenses with fast autofocus complement E-P2’s capability for subject tracking.

Exposure Control, ISO Ranges, and Shutter Speeds

Both cameras provide the crucial manual exposure features demanded by serious photographers:

• Aperture Priority, Shutter Priority, and full Manual exposure modes.
• Exposure compensation functionality.
• Custom white balance capabilities.

Regarding ISO, both models offer a max native ISO of 6400 but practical usability differs. The S100’s low light performance diminishes significantly above ISO 400 due to the smaller sensor, creating notable noise and detail loss. The E-P2's Four Thirds sensor and TruePic V processor afford cleaner images up to ISO 1600–3200, suitable for more challenging lighting.

Shutter speeds vary between the two: the Canon S100 supports shutter times from 15 seconds up to 1/2000s, while the Olympus extends the max shutter speed to 1/4000s with a minimum shutter speed of 60 seconds, advantageous for long exposures such as astrophotography and slow shutter effect images.

Image Stabilization and Flash Facilities

The S100 integrates optical image stabilization within its lens, reducing camera shake for handheld shooting, particularly beneficial at telephoto settings and during low-light. The E-P2 uses sensor-based stabilization (IS), delivering stabilization regardless of lens choice, which grants an important advantage when paired with manual focus or prime lenses.

While the S100 includes a built-in flash with multiple flash modes (Auto, On, Off, Red-Eye, Slow Sync) and a flash range of 7 meters, the Olympus E-P2 lacks an integrated flash, instead relying on external flashes with more versatile control including manual power levels. This distinction influences portability and creative flash usage:

• S100 is more straightforward for casual flash photography.
• E-P2 supports more sophisticated lighting setups but requires an additional flash unit.

Video Recording Capabilities: HD Video on Both, but Limited Advanced Features

Regarding videography, the Canon S100 outputs full HD video (1920 x 1080) at 24fps with both H.264 and Motion JPEG formats, suitable for casual video capture with moderate quality expectations. Frame rates include higher speed options (up to 240 fps in low resolutions) for slow-motion effects, enhancing creative possibilities.

The Olympus E-P2 records HD at 1280 x 720 pixels at 30fps in Motion JPEG only, which translates to larger file sizes and comparatively lower quality video output. Neither camera offers microphone or headphone input ports, limiting professional audio control.

For hybrid shooters prioritizing video capabilities, the Canon S100 holds a distinct advantage in resolution and codec options, albeit within the constraints of their era.

Battery Life and Storage: Real-World Shooting Capacities

The E-P2 offers superior battery endurance, rated at approximately 300 shots per charge, compared to the S100’s 200 shots. This difference can be critical on extended shoots or travel where charging opportunities are limited.

Both cameras use SD/SDHC storage, but the Olympus accepts standard SD cards with no documented support for SDXC, while the Canon supports SDXC as well, enabling larger capacity cards and potentially higher-speed write operations.

Connectivity, Wireless, and GPS Features

Wireless technology integration differs: the Canon S100 uniquely features Eye-Fi card compatibility and built-in GPS functionality, facilitating immediate geotagging and wireless image transfer. This capability was advanced for its time, supporting travel and street photographers who prioritize metadata automation and wireless convenience.

The Olympus E-P2 lacks any form of built-in wireless or GPS, necessitating external solutions for these features, which can be a detriment for modern workflows requiring remote capture or rapid image sharing.

Genre-Specific Performance Analysis

The cameras’ respective features impact performance across photographic disciplines as follows:

Portrait Photography

• Canon S100: The wide f/2.0 aperture at 24 mm favors environmental portraits, preserving context while offering respectable subject isolation thanks to the small sensor’s inherent depth-of-field characteristics. Face detection autofocus aids in accurate skin tone capture.
• Olympus E-P2: Larger sensor allows better natural bokeh with fast primes, improved color depth, and reduced noise for natural skin tones. Manual focus lens options enhance artistic control.

Landscape Photography

• Canon S100: Limited zoom range and smaller sensor restrict dynamic range for shadow recovery, but portability is a plus. The S100's superior dynamic range rating is partly offset by smaller sensor limitations.
• Olympus E-P2: Larger sensor and available high-quality wide-angle lenses offer superior detail and tonal gradation. The E-P2 lacks weather sealing, however, limiting rugged use.

Wildlife and Sports Photography

• Canon S100: Slower AF and 2fps burst rate constrain action capture. Infrequent continuous autofocus diminishes tracking accuracy.
• Olympus E-P2: Improved autofocus modes and 3fps burst rate permit more reliable subject tracking. Interchangeable lenses extend telephoto reach significantly.

Street Photography

• Canon S100: Pocketable size and quiet operation favor unobtrusive shooting, with reliable face detection.
• Olympus E-P2: Larger presence might inhibit candid moments, but manual focus controls enable creative effects.

Macro Photography

• Canon S100: 3 cm minimum focus distance supports decent macro shots at fixed zoom.
• Olympus E-P2: Access to dedicated macro lenses and sensor stabilization offers superior focusing precision and magnification.

Night / Astro Photography

• Canon S100: Up to 15-second shutter and GPS tagging for star trails are useful, though limited sensor low light performance.
• Olympus E-P2: Longer shutter capability (up to 60 seconds), better high ISO performance, and interchangeable lenses increase astro suitability.

Video Capabilities

• Canon S100: Full HD 1080p video at 24fps and broadened frame rates for slow motion.
• Olympus E-P2: Limited to 720p at 30fps with larger file sizes and lack of advanced codecs.

Travel Photography

• Canon S100: Lightweight, compact, GPS enabled - ideal for travel documentation.
• Olympus E-P2: Heavier but more versatile, suitable where lens interchange and higher image quality are prioritized.

Professional Use

• Canon S100: Limited by fixed lens and slower AF; however, RAW support and exposure options offer creative flexibility.
• Olympus E-P2: Superior RAW files, broad lens system, and manual controls align better with professional workflows, though lacks ruggedness and advanced connectivity.

Canon S100 front Canon S100 screen back Olympus E P2 front Olympus E P2 screen back

Inflation-Adjusted Pricing and Value Consideration

At launch, the Canon S100 retailed at approximately $429, whereas the Olympus E-P2 was priced nearly double at $799. When considering performance relative to cost, the S100 delivers excellent value for consumers desiring a high-quality compact with advanced shooting modes and portability.

The E-P2, while more expensive, justifies its premium through extensive lens compatibility, superior sensor performance, and better manual controls. For buyers willing to invest in an ecosystem offering creative versatility and improved image quality, the Olympus holds significant appeal.

Recommendations: Matching Camera to Photographer Profiles

• Beginner and Casual Shooters: The Canon S100 is well suited for those needing a pocketable camera with strong image quality, ease of use, and good daylight performance without the complexity of interchangeable lenses. Its GPS and wireless features further streamline casual travel photography.

• Enthusiasts Seeking Versatility: Photographers wanting to experiment with lenses, manual controls, and improved image quality would benefit from the Olympus E-P2, especially if system growth and advanced shooting scenarios are priorities.

• Travel Photographers: For lightweight travel with quick point-and-shoot functionality, the Canon S100 excels. Alternatively, Olympus users can carry multiple optics for varied creative output but at the cost of payload and complexity.

• Portrait and Studio Photography: The Olympus E-P2 with fast primes delivers better bokeh, color handling, and image quality, hence preferable for portraits.

• Action, Wildlife, and Sports: Neither model competes with modern fast autofocus cameras; however, the Olympus’ continuous AF mode and higher burst rate make it slightly more effective for dynamic subjects.

• Videographers: The Canon S100’s full HD video and flexible frame rates provide a marginal edge for casual video work.

Conclusion

Drawing upon extensive field testing and image analysis, both the Canon PowerShot S100 and Olympus PEN E-P2 occupy important niches within early 2010s digital imaging.

The Canon S100 shines as a compact powerhouse, elegantly balancing portability, daylight image quality, and handy automation features such as GPS and wireless transfer. However, its smaller sensor and fixed lens limit low light performance and creative control.

The Olympus E-P2 delivers superior image quality in challenging lighting thanks to its larger Four Thirds sensor and a robust, versatile lens system. Its superior manual controls, sensor stabilization, and RAW file quality cater to enthusiasts and pros seeking creative expansion. Conversely, it trades off portability and video performance.

Ultimately, the decision rests on user priorities: if absolute compactness, ease, and cost-effectiveness are paramount, the Canon S100 remains a compelling choice. For photographers who demand flexibility, system growth, and better all-around image quality, the Olympus E-P2 stands as a more capable albeit pricier platform.

Both cameras continue to represent instructive case studies in design philosophy and evolving digital imaging standards. With this detailed appraisal, informed buyers can align technical specifications with their specialized shooting needs and workflow demands.

This comparison leverages manufacturer specifications, DxOMark data, and real-world experience garnered through standardized focusing tests, resolution chart assessments, and extended field use under varied lighting and subject conditions. The author’s direct hands-on interactions ensure recommendations are predicated on tested reliability, operational practicality, and detailed image outcome scrutiny.