Head-to-Head: Casio EX-Z90 vs Samsung NX20 – A Deep Dive into Two Distinct Camera Eras and Classes

When we look back at compact cameras from the late 2000s versus advanced mirrorless models from the early 2010s, the technological leaps are stark, and so are the user needs and photography outcomes. Here, we closely examine the Casio EX-Z90, a budget small-sensor compact introduced in 2009, alongside the Samsung NX20, a more ambitious APS-C mirrorless camera released in 2012, bridging entry-level and enthusiast demands.

This comparison article serves photography enthusiasts and professionals seeking a nuanced understanding of these two very different cameras, evaluated across technical merits and practical performance in varied shooting scenarios. Throughout sections, you’ll find detailed specs analysis, hands-on insights from real-world testing, and candid pros and cons - allowing you to match camera capabilities to your shooting style and budget.

Designing the Experience: Size, Handling, and Ergonomics

Physical form and control layout fundamentally shape how a camera feels during extended use, influencing creative confidence and shooting speed.

The Casio EX-Z90, true to its compact class, boasts a petite frame (90 x 52 x 19 mm) weighing only 121 grams. This makes it exceptionally pocketable and travel-friendly. However, the slim profile limits grip comfort and tactile control accessibility, which may frustrate users accustomed to more substantial handholds - its fixed non-articulated 2.7-inch screen with modest 230k pixel resolution compounds this challenge, as precise framing and menu navigation are less intuitive.

By contrast, the Samsung NX20, sized at 122 x 90 x 40 mm and tipping the scales at 341 grams, exhibits a classic DSLR-style mirrorless body that prioritizes ergonomics. The substantial grip, well-placed command dials, and fully articulated 3-inch AMOLED touchscreen (with 614k pixels) allow for flexible composition angles and responsive touch interactions (though it surprisingly lacks a touch interface). You’ll appreciate the extensive manual controls, including dedicated exposure modes (shutter, aperture priority, and full manual) absent on the EX-Z90 - enabling fine exposure management critical for advanced users.

For photographers valuing portability above all, the EX-Z90’s compactness is appealing. However, for serious shooting comfort and rapid parameter changes, the NX20 wins hands down.

Sensor and Image Quality: The Heart of Photography

Sensor size and technology are decisive for image quality, dynamic range, low light performance, and overall creative latitude.

The Casio EX-Z90 incorporates a modest 1/2.3-inch CCD sensor measuring approximately 6.17 x 4.55 mm with 12 megapixels resolution - a typical compact sensor choice of its day, well suited for casual point-and-shoot scenarios but limited in resolution capacity and signal-to-noise ratio. With a max native ISO of 1600 and no RAW support, sophisticated post-processing options and low-light performance prospects are restricted. The CCD technology introduces a natural color rendering with pleasant out-of-camera JPEGs, but struggles with noise beyond ISO 400.

In contrast, the Samsung NX20 impresses with a large APS-C CMOS sensor at 23.5 x 15.7 mm delivering a 20-megapixel count, offering drastically superior resolution, detail, and noise control. The CMOS sensor benefits from modern readout architectures, enabling better dynamic range (notably, 12.9 EV at DxOMark) and higher maximum ISO up to 12,800. Detailed RAW output compatibility enriches post-production flexibility - a must for photographers demanding the highest image fidelity.

For critical image quality in portrait, landscape, or low light assignments, the NX20’s sensor design sets a significantly higher baseline.

Visual Interface and Controls: A Closer Look at Handling Photography Workflows

User interface components impact workflow efficiency, focusing ease, and framing accuracy - especially in demanding shoots.

The EX-Z90’s fixed 2.7-inch LCD with 230k resolution limits detailed real-time preview functionality and manual focusing accuracy, particularly for macro or portrait precision work. Its menus are simplified, designed for casual snapshots rather than in-depth exposure tweaking - the lack of touchscreen input or live histogram feedback presents practical disadvantages. Moreover, the absence of any viewfinder requires full reliance on the LCD, which may be suboptimal in bright outdoor environments.

Samsung NX20, with its high-resolution AMOLED screen fully articulated for tilt and swivel, grants unparalleled framing flexibility and image review capabilities, especially useful for macro and creative angles. The integrated 100% coverage electronic viewfinder (EVF) of respectable magnification (x0.7) ensures confidence in composition, even under bright sunlight. Moreover, piecing live exposure information and focus peaking through the EVF or LCD facilitates precise manual focusing - essential for users practicing advanced techniques such as focus stacking or portrait eye detection.

Overall, NX20’s superior interface affords serious photographers more confident control with nuanced visual feedback, while EX-Z90’s interface suits casual point-and-shoot needs.

Autofocus and Manual Focus: Speed, Accuracy, and Lens Compatibility

Sharpness is foundational, and autofocus systems must be scrutinized in terms of speed, consistency, and accuracy.

The EX-Z90 relies on contrast-detection autofocus, with a single central AF point and no tracking or face detection capabilities - typical for compact cameras at its time, but severely limiting for fast action or selective focusing needs. Manual focus is available but rudimentary.

Meanwhile, the NX20 features a 15-point contrast-detection AF array, including selective and multi-area modes, enhanced by face detection to assist portrait work. While lacking phase detection autofocus (PDAF) common in later mirroless cameras, the NX20’s AF performance was generally responsive in good lighting conditions and effective for tracking moderate movement. Continuous AF modes slightly improve burst usability, with 8 fps frame rate capability supporting action photography more robustly. Moreover, manual focusing is aided by focus peaking and magnification options.

Furthermore, the NX20’s interchangeable Samsung NX mount opens compatibility to 32 native lenses ranging from ultra-wide to telephoto primes and zooms, vastly expanding creative options. The EX-Z90’s fixed zoom lens (35-105mm equivalent, f/3.1-5.9) is convenient but inflexible and optically modest.

In wildlife or sports photography, the NX20’s AF sophistication and lens choices create substantial advantages, although enthusiasts should note the absence of in-body stabilization may require stabilized lenses or tripods.

Shooting Performance Across Photography Genres

To provide a comprehensive perspective, we examine real-world performance across popular photography genres, highlighting strengths and drawbacks.

Portrait Photography

The NX20, benefiting from an APS-C sensor and interchangeable lenses, excels in skin tone rendering, background separation (bokeh), and precise eye detection autofocus, essential for flattering portraits. Its custom white balance and RAW output deliver extensive editing scope. The EX-Z90’s smaller sensor and fixed lens limit depth-of-field control and background blur quality, resulting in flatter portrait images; its lack of face detection autofocus further hampers sharpness reliability.

Landscape Photography

Dynamic range and resolution are paramount for landscapes. Here, NX20’s 20MP sensor and 12.9 EV dynamic range capture greater tonal subtleties and detailed textures, assisted by RAW support for extended shadow recovery. Although neither camera is weather sealed, the NX20’s build quality is sturdier to endure light environmental challenges. Conversely, EX-Z90’s lower resolution and limited dynamic range confine the expressive potential of landscapes.

Wildlife and Sports Photography

Rapid autofocus, telephoto reach, and high frame rates determine success in these action-oriented genres. The NX20’s 8 fps bursts and selective AF points coupled with telezoom lenses confer solid tracking and shooting precision. The EX-Z90’s limited focal length (equivalent to 105mm max), single AF point, and no burst shooting restrict usability dramatically in these fast-changing scenes.

Street Photography

Here, discretion, portability, and low-light ability count. The EX-Z90’s compactness favors unobtrusive shooting and easy carry. However, limited ISO (max 1600) and slow lens aperture impede low-light street captures. NX20’s larger presence and weight reduce invisibility, but its higher ISO capabilities and articulating screen assist shooting from creative angles. Additionally, the EVF enables composition without drawing attention.

Macro Photography

Focusing precision, magnification, and image stabilization are critical. Neither camera offers in-body stabilization, but NX20 compensates through optional stabilized lenses. EX-Z90’s 10cm macro focus limit is generous for a compact camera but lacks fine manual focus aids. NX20 affords greater control and magnification potential via dedicated macro lenses.

Night and Astrophotography

High ISO performance and exposure modes matter here. The NX20’s native ISO up to 12,800 and CMOS sensor provide lower noise and longer exposures with RAW flexibility. Fixed ISO ceiling and higher noise in the compact EX-Z90 hinder night shooting viability beyond casual snaps.

Video Capabilities

The EX-Z90 provides basic 720p HD at 24 fps in Motion JPEG format, which is largely outdated and results in bulky files with limited editing potential. The NX20 supports full HD 1080p at 30 fps with more modern MPEG-4/H.264 codecs, optional external microphone input enhancing audio quality, and HDMI output for video preview or capture, positioning it better for beginner and enthusiast videographers.

Travel Photography

Lightweight, pocketable gear is favored. The EX-Z90’s tiny frame is a clear winner for minimalist travel. Its limited zoom range and image quality might disappoint advanced travelers seeking versatility. NX20’s heavier build and interchangeable lens system increase versatility and image quality, at the cost of portability and battery life (rated at approximately 360 shots).

Professional Use

For professional workflows, RAW support, robust build, image quality, and extensive controls are non-negotiable. NX20 candidly outperforms the EX-Z90, offering pro-level image fidelity, expanded exposure modes, custom white balance, and more extensive storage compatibility (SD/SDHC/SDXC). The EX-Z90’s lack of RAW, fixed lens, and simplified controls confine it to casual or snapshot environments.

Build Quality and Weather Resistance

Neither camera is rated for environmental sealing. The NX20’s larger frame is built more solidly with quality materials typical of mirrorless bodies from 2012, yielding increased durability. The compact EX-Z90’s plastic shell prioritizes lightness over toughness.

Battery Life and Storage Flexibility

The NX20 uses a proprietary Lithium-Ion battery (BP1130), rated at approximately 360 shots per charge - a respectable figure that supports longer shooting sessions. The EX-Z90’s NP-60 battery offers unspecified but limited capacity, consistent with compact camera norms, implying more frequent recharging during intensive use.

Both cameras support SD card storage; however, the NX20’s compatibility extends to SDXC for higher capacity cards, benefitting professionals relying on large RAW files.

Connectivity, Wireless Features, and Expandability

Wireless capabilities represent another area of contrast:

• The EX-Z90 offers Eye-Fi compatibility, an early wireless SD card solution enabling wireless image transfer, albeit with limited current usability and security.

• The NX20 integrates built-in Wi-Fi for image sharing and remote control, complemented by an HDMI port for video output and an optional GPS module for geotagging - features appealing to modern photographers.

The NX20 additionally supports external flashes via a hot shoe, vastly expanding lighting options, whereas the EX-Z90 is restricted to its built-in flash with limited range and modes.

Pricing and Value Analysis

At launch, the Casio EX-Z90 was priced around $150, targeting casual shooters desiring simple point-and-shoot functionality with pocketability.

In sharp contrast, the Samsung NX20 arrived at approximately $1,100, positioning it among enthusiast and entry-level professional mirrorless cameras, offering advanced features, sensor quality, and system extensibility.

The stark price divergence aligns with the massive specification gulf, sensor size, lens flexibility, and handling sophistication - indicating these cameras serve fundamentally different customer segments.

Side-by-Side Sample Image Comparison

Casio EX Z90 front Casio EX Z90 screen back Samsung NX20 front Samsung NX20 screen back

Viewing side-by-side test images, one observes the following: the NX20’s photos display richer tones, higher resolution detail, and smoother gradations. Noise control is far superior at mid-to-high ISO levels. The EX-Z90 produces adequately sharp images in good light but quickly shows limitations in color fidelity and noise creeping at ISO 400 and above.

Portrait bokeh achievable with the NX20’s wide-aperture lenses far surpasses the compact’s depth of field control, delivering subject isolation essential for visual storytelling.

Detailed Genre-Specific Scores

When assessing cameras within specialty fields, the NX20 consistently outperforms the EX-Z90 across nearly all categories, particularly excelling in portrait, landscape, wildlife, and sports photography given its advanced sensor and lens system. The EX-Z90 earns credit mainly for street photography due to its compact size and convenience, and casual travel shots.

Expert Recommendations: Who Should Buy Which Camera?

Choose the Casio EX-Z90 if:

• Your primary criterion is ultimate portability with simple operation.
• You are a casual shooter documenting everyday moments or travel without emphasis on image quality.
• You have a limited budget and do not require advanced features or interchangeable lenses.
• You seek a lightweight backup camera to complement a more capable system.

Choose the Samsung NX20 if:

• You require high image quality with a large APS-C sensor and RAW capture for maximum post-processing latitude.
• You want a camera that grows with you, offering interchangeable lenses, manual controls, and expanded creative capabilities.
• Video recording quality and external audio input matter for your projects.
• You prioritize ergonomics and an extensive feature set conducive to serious portrait, landscape, wildlife, sports, or macro photography.
• You are willing to invest more upfront for a system with professional aspirations.

Final Thoughts: A Study in Evolution and Priorities

Comparing the Casio EX-Z90 and Samsung NX20 is a fascinating exercise in understanding how rapidly camera technology and user expectations evolved in the early 2010s. While the EX-Z90 stands as a testament to affordable, portable photography available to the masses a decade ago, the NX20 heralds a transition into the mirrorless era with enhanced technical prowess and versatility tailored to enthusiasts and prosumers.

Photographers today considering these cameras would need to weigh their priorities carefully - balancing convenience vs ultimate image quality, budget limitations vs creative flexibility, and casual usage vs specialized photographic needs.

This thorough, experience-driven evaluation affirms that while the Casio EX-Z90 remains an amicable pocket snapshot camera for novices or those valuing size above all, the Samsung NX20 represents a clear step toward advanced imaging with a more purposeful design philosophy, professional-grade sensor performance, and an expandable system to fuel creative growth.

Appendices: Key Technical Specification Summaries

This comprehensive comparison reflects hands-on testing, rigorous specification analysis, and real-world experience accrued over extensive camera evaluations, ensuring your next purchase is well informed and suited to your photographic ambitions.