Casio EX-Z90 vs Sony A35: A Practical Comparison from Real-World Experience

Over the last decade, I have extensively tested hundreds of cameras spanning compact point-and-shoots, mirrorless models, and DSLRs. Today, I want to share a detailed comparison between two very different, yet fascinatingly comparable cameras from different eras and market positions: the Casio EX-Z90, a 2009-era small sensor compact, and the Sony SLT-A35, a 2011 entry-level DSLR successor to the innovative SLT line. Both have charm and purpose, but for distinctly different shooters and budgets.

By the time you finish this article, you’ll have a complete understanding of where each excels or falls short - from portraiture to wildlife, from sensor tech to ergonomics - and know exactly which one may suit your photographic aspirations best.

A Tale of Two Cameras: First Impressions and Physical Feel

When beginning any camera comparison, I always start in hand, running my fingers over dials, buttons, and the body heft. Comfort, balance, and control accessibility profoundly impact field shooting enjoyment and performance.

Here, the contrast is striking.

The Casio EX-Z90 is one of those unmistakably compact cameras designed to slide discreetly into a pocket or purse. Weighing just 121 grams and measuring a mere 90 x 52 x 19 mm, it’s a minimalist delight. Its slim, rectangular shape invites quick snapshots but offers very little in terms of grip or tactile controls. The glossy exterior feels plasticky and light, but well-crafted for its class.

Meanwhile, the Sony SLT-A35 (~415 grams, 124 x 92 x 85 mm) feels weighty and substantial, typical of an entry-level DSLR. The transition from the ultra-compact Casio to this solid, slab-like body is dramatic. The grip is deep and comfortable, well-sculpted for multi-hour shoots, and the button layout is evidently designed for more manual control.

This side-by-side image captures the physical size and ergonomic divide vividly.

In practice, I find myself instinctively reaching for the Sony when deliberate photography is a priority, especially for genres requiring manual tweaks. On the other hand, the Casio’s featherweight construction is ideal for spontaneous street moments or travel where bulk isn’t welcome.

Design and Controls: Speed and Intuition in the Field

Ergonomics extend beyond size - let’s look at how these cameras invite interaction. On the top plate, the Casio EX-Z90 offers minimal buttons, relying on a straightforward dial-less interface. This simplicity reduces learning curve but also limits creative flexibility - no dedicated exposure modes beyond full auto. It’s point-and-shoot in the truest sense.

The Sony A35, however, packs significant control options: a mode dial giving quick access to manual, aperture, shutter priority, plus dedicated buttons for ISO, drive, and flash settings. The 3-inch LCD has excellent resolution for image preview and camera setup thanks to 921k dot count.

This image illustrates the distinct control philosophies - in one corner, minimalism; in the other, DSLR-style command.

For me, the physical dials and buttons translate into faster changes without digging into menus, critical when shooting fast-paced scenes like sports or wildlife. The Casio, lacking physical shortcuts, can slow reaction time.

Seeing the World: Sensor Tech and Image Quality

The heart of any camera’s image capabilities lies in its sensor. Here we meet the principal technical gulf between these models.

• Casio EX-Z90: Utilizes a 1/2.3" CCD sensor (measuring 6.17 x 4.55 mm) with 12 MP resolution. This sensor size is tiny, common for compact cameras of its era.
• Sony A35: Houses a much larger APS-C CMOS sensor (23.5 x 15.6 mm) at 16 MP, a sensor class favored by enthusiasts and professionals for its superior image quality potential.

This image compares sensor sizes, emphasizing the massive difference in light-gathering surface area.

From my hands-on tests comparing RAW outputs and JPEGs alike, the Sony A35 delivers notably better color depth, dynamic range, and low light sensitivity thanks to its larger sensor and CMOS technology. The Casio’s CCD sensor produces decent daylight images but struggles above ISO 400 - noise becomes intrusive quickly. The Sony’s ISO 100-3200 performance remains clean with usable detail, aided by the sensor-based image stabilization.

The smaller Casio sensor constrains sharpness and tonality, particularly in shadow recovery or highlight preservation. Landscapes and fine detail scenes look softer and less vibrant than on the A35.

Viewing Your Shots: Display and Viewfinder

One aspect where the Sony continues to excel is in viewfinder experience. The Casio EX-Z90 lacks any finder whatsoever, relying solely on its modest 2.7-inch, 230k pixel fixed LCD screen, which under bright light is difficult to view. The restrictive screen also hampers intuitive composition and reviewing details in the field.

The Sony A35 offers a 3-inch, high-resolution 921k LCD, making live-view framing and menu navigation more user-friendly. Additionally, it sports a color electronic viewfinder (EVF) with 1150k resolution covering 100% of the frame, a feature that is critical in bright outdoor shooting conditions or for steady, precise composition.

Having tested both in direct sunlight, I always rely on the EVF for better visibility and steadiness with the Sony.

Battery, Storage, and Connectivity: Practical Everyday Usage

For everyday usability, battery life and storage matter.

The Casio EX-Z90 uses the modest NP-60 lithium-ion battery, but unfortunately, lacks official battery life specs, generally allowing only a few hundred shots per charge - a limitation due to its compact design.

The Sony A35, with a larger body, supports the NP-FW50 battery pack, delivering about 440 shots per charge (CIPA standard), suitable for longer outings or more serious shoots.

Storage-wise, the Casio supports standard SD/SDHC cards (and MMC), while the Sony accepts SD/SDHC/SDXC plus proprietary Memory Stick Pro Duo media, granting wider compatibility and higher capacity options.

Connectivity-wise, the Casio includes Eye-Fi card support allowing wireless transfer (a rare feature for 2009), whereas the Sony A35 has no Wi-Fi or Bluetooth, a limitation that could be critical today.

Exploring Photography Genres: Which Camera Suits What?

I always recommend choosing equipment based on your photographic focus. Let’s examine how these cameras perform across common photography disciplines.

Portrait Photography: Skin Tones and Focusing

Capturing natural skin tones and achieving smooth bokeh are key for portraits.

The Sony’s APS-C sensor excels in color fidelity and tonal gradation, rendering pleasing, natural skin tones. Coupled with quality Sony/Minolta Alpha lenses, you can shoot wide apertures to isolate subjects with creamy bokeh.

Autofocus-wise, the A35 impresses with 15 phase-detection points and effective face detection in live view, yielding reliable portraits even in moderate light.

The Casio EX-Z90’s limited 3x zoom lens (35-105mm equivalent) has a restricted maximum aperture (f/3.1–5.9) and no true manual aperture control. Combined with its small sensor, achieving natural background separation is difficult. The contrast-detection autofocus lacks face detection, making portrait focusing a manual patience game.

Landscape Photography: Resolution and Dynamic Range

For sweeping vistas, dynamic range and resolution are paramount.

The Sony’s 16 MP APS-C sensor delivers detailed images with headroom in highlights and shadows, while compatibility with wide-angle lenses is a plus.

Weather sealing is limited on both models - but given the Sony’s more robust build, it offers better handling in outdoor conditions.

The Casio’s small sensor and lower image quality make landscapes look less vibrant, and its 12 MP resolution is starting to feel dated.

Wildlife and Sports: Autofocus and Burst Rates

For action photography, speed and focus performance count.

With a respectable 6 frames per second burst rate and reliable phase-detection AF, the Sony A35 offers competent performance for amateur wildlife and sports shooters.

The Casio EX-Z90 has no continuous shooting mode, autofocus is contrast-detection only and single-shot, making it ill-suited for tracking moving subjects.

Street Photography: Discretion and Portability

For street shooters craving inconspicuousness, size matters most.

The Casio's tiny body is less intimidating and easy to carry, perfect for candid urban imagery or travel snapshots.

The Sony’s bulkier size compromises stealth but grants flexibility for more creative control when moments demand it.

Macro and Close-Up Work

Macro capabilities on the Casio offer a minimum focus distance of 10 cm, which is decent for flower or small object close-ups in compact snaps.

The Sony’s effectiveness depends on lens choice - mounts exist for dedicated macro optics delivering superior sharpness and magnification.

Night and Astrophotography

Despite the Casio's limited max native ISO 1600, noise is excessive at higher ISOs, and long shutter speeds max out at 2 seconds, limiting possibilities.

Sony A35’s native ISO 100-25600 range combined with up to 30s shutter and body stabilization present stronger low-light and night shooting capacity.

Video Capabilities

Video features reveal a notable generational gap.

The Casio EX-Z90 records modest 720p at 24fps using Motion JPEG, lacking modern codecs, professional audio input, or stabilization.

The Sony A35 supports Full HD 1080p at 60fps, with AVCHD and MPEG-4 codecs, plus external microphone input - a boon for videographers.

Lens Ecosystem and Expandability

This is where the Sony A35’s lineage shines broadly.

With access to over 140 native lenses in the Sony/Minolta Alpha lineup - spanning primes, zooms, macros - you get ample creative control. The Casio is fixed-lens only.

Build Quality and Weather Sealing

Neither camera offers true weather sealing, but the Sony’s more robust DSLR-like construction fares better in challenging conditions.

Summarizing Scores and Practical Verdict

After running both cameras through a battery of real shooting scenarios and lab tests, here are overall performance ratings based on image quality, handling, autofocus, video, and versatility:

Breaking performance down by photographic genres reveals the Sony A35’s advantages across most categories:

Real-World Image Samples

To give you a better feel for output differences, here are sample images from both cameras shot side-by-side in similar lighting and scene types. Notice the richer color, finer detail, and better noise control from the Sony.

Casio EX Z90 front Casio EX Z90 screen back Sony A35 front Sony A35 screen back

What Does This Mean for You? Clear Recommendations

• If portability, ease-of-use, and budget are your central concerns, and your photography is casual - snapshots, travel diaries, street candids - the Casio EX-Z90 remains a nimble, affordable choice. It’s a handy point-and-shoot that doesn't intimidate beginners, perfect when you want a camera always ready in your pocket.

• If you desire significant control, image quality, and expandability to grow as a photographer, and have the space to carry a larger camera, the Sony SLT-A35 is a compelling entry-level DSLR alternative. It’s well suited for portraits, landscapes, wildlife, sports and video work, plus it provides a useful stepping stone into a vast lens ecosystem.

For professionals or advanced enthusiasts looking for raw image capture, high-speed autofocus, and robust features, the Sony clearly dominates.

Final Thoughts: Experience Counts

Having personally field-tested both cameras over dozens of shooting sessions, from busy city streets to quiet nature escapes, I can say that while the Casio EX-Z90 offers simplicity and portability without fuss, the Sony A35 is a much more capable photographic tool that rewards engagement and creative ambition.

Your choice depends largely on how much control you want, what you shoot most, and how much gear you want to carry. Many photographers keep a compact and a DSLR/mirrorless as complementary tools.

Whichever you pick, understanding these cameras’ core strengths and limits will help you get the most joy and artistry from your photography journey.

Disclosure: I have no commercial affiliations with Casio or Sony; this comparison stems purely from hands-on professional testing and field experience.