Choosing between two compact cameras like the Casio EX-Z800 and the Olympus TG-610 can be surprisingly challenging. Both appeared around the same time, offered similar sensor resolutions, and catered to the enthusiast who wants reasonable image quality without hauling bulky gear. But which one truly delivers for your style of photography? I’ve spent time with both models, evaluating their key attributes across multiple shooting scenarios, and in this comprehensive comparison, I’ll unpack what sets them apart - from sensor performance to handling, focusing, video, even their suitability for everything from landscapes to street shots. As someone who’s tested hundreds of cameras, this hands-on insight will help you pinpoint which one aligns with your shooting needs and budget.

Compact bodies, distinct priorities: Handling and ergonomics face-off

Let's start with the very foundation of your shooting experience: the camera body itself. Both cameras fall into the smaller compact category but target slightly different users.

The Casio EX-Z800 is an ultracompact powerhouse - slim, light, and discrete, perfect for slipping into a pocket for casual snaps or street photography. Measuring just 91 x 52 x 20 mm and tipping the scales at around 124 grams, its understated design won’t scream “camera!” when you’re out on the town.

The Olympus TG-610, meanwhile, bumps up the size quite noticeably to 96 x 65 x 26 mm and a weight closer to 190 grams. The trade-off? Weatherproofing and tougher build quality, so it’s ready for action in rain, snow, or dusty environments without a worry.

The top control layout and button placement reveal the cameras’ philosophies - Casio opts for a minimalistic approach, relying on the rear controls and dial that’s intuitive once you get used to it but less tactile, while Olympus offers chunkier buttons with more direct access to functions including waterproof-focused modes.

For those prioritizing portability and stealth, the Casio edges ahead. But if ruggedness and grip under tough conditions matter more, the TG-610’s slightly larger, more substantial body is a winner here.

Sensor tech and image quality: Same sensor size, different results

Both cameras use a 1/2.3-inch CCD sensor measuring 6.17 x 4.55 mm, packing around 14 megapixels. So at first glance, you might think image quality will be neck-and-neck. However, sensor size is only part of the story - lens characteristics, image processor, and noise handling make significant differences.

Casio’s EX-Z800 employs the Exilim Engine 5.0 processor, while Olympus’s TG-610 features the TruePic III+ engine. These influence overall color rendering, noise reduction, and dynamic range optimization.

One technical limitation shared by both is the lack of RAW support - JPEG is the sole image output format, making strong in-camera image processing critical to getting a usable file.

In practical shooting, I found the Casio delivers punchier, warmer colors with decent contrast, making it modestly appealing for portraits and casual snapshots. The Olympus, by contrast, produces slightly cooler tones but with a bit better sharpness edge-to-edge, which benefits landscapes.

Noise control at higher ISOs (above 800) favors the Olympus, which allows ISO up to 1600 native, compared to Casio’s max of 3200 but with visibly more grain. Both struggle under low-light, typical of compact CCD cameras from this period.

One important note: The Olympus’s wider zoom range (28-140mm equivalent) matches well with its sharper optics, giving extra versatility for framing. Casio’s 27-108mm lens is shorter but slightly faster at wide end (F3.2 vs. F3.9), offering marginally better low light wide-angle shots.

Viewing and interface: LCD and controls - how do you see and shoot?

Here, the Olympus pulls ahead in a meaningful way. Its 3-inch, 920k-dot TFT HyperCrystal III LCD is bright, sharp, and responsive, making live composition, menu navigation, and playback easier in bright sunlight and tricky angles.

The Casio’s 2.7-inch, 230k-dot fixed LCD feels cramped and coarse by comparison, limiting usability outdoors and for critical focusing.

Neither camera offers an electronic viewfinder, so you’ll rely entirely on the screen. Given that, the TG-610’s display is simply more enjoyable and functional over longer shoots or video recording.

In terms of user interface and ergonomics, both cameras lack touchscreen capabilities - which was still rare in their era - but Olympus’s more refined menu system and support for custom white balance bracketing make it friendlier for enthusiasts wanting extra control without diving into manual modes.

Autofocus, burst, and shooting flexibility: Who locks on better?

Both cameras rely on contrast-detection autofocus systems on their CCD sensors, classic for compact models of this generation, but they differ in performance priorities.

Casio EX-Z800 offers a single autofocus point with no tracking or continuous autofocus modes. It supports face detection but lacks eye detection or subject tracking, which limits its accuracy for moving subjects.

The Olympus TG-610 takes a slight edge here with face detection plus an improved contrast autofocus system that includes autofocus tracking, enabling it to better follow subjects through the frame in some scenarios, albeit with some occasional hunting in low contrast.

Neither camera supports burst shooting beyond single frames. Casio lacks continuous shooting altogether; Olympus offers a slow 1 fps continuous shooting - hardly fast enough for sports or wildlife, but better than nothing.

For wildlife or sports photographers seeking speed and precision, these cameras won’t compete with advanced mirrorless or DSLR systems. But between the two, Olympus’s autofocus is a bit more reliable in active environments.

Build quality and toughness: Does ruggedness matter to you?

This is where the Olympus TG-610 seriously distinguishes itself. Rated waterproof up to 3 meters, shockproof from 2 meter drops, freezeproof down to -10°C, and dustproof, it’s engineered to survive and shoot in harsh conditions.

In contrast, the Casio EX-Z800, with no weather sealing or robustness claims, requires care to avoid moisture or dust damage.

If you shoot adventure sports, hiking, beach outings, or just want peace of mind against the elements, Olympus is clearly the better choice. Casio suits stable, controlled environments like indoor, street, or general travel photography.

Portraits and close-ups: How do these cameras handle skin tones, bokeh, and precision?

Portrait shooting benefits from accurate skin tones, pleasing background blur, and sharp facial focus - all tricky for compact cameras with small sensors and limited aperture control.

Neither camera offers aperture priority or manual exposure, limiting your creative control for backgrounds. Both feature sensor-shift image stabilization, which helps reduce handshake blur in lower light.

The Casio’s slightly faster lens at 27mm wide end (F3.2) occasionally yields a more shallow depth of field, but the relatively short focal length means background separation is modest.

Olympus’s 28-140mm zoom allows you to zoom in strongly for tighter portraits, creating better background compression - vital for smooth bokeh on portraits. Plus, face detection autofocus enhances focus accuracy on eyes and faces, offering greater confidence you’ll get sharp eyes.

For macro, Olympus’s 3cm minimum focus distance easily beats Casio’s non-dedicated macro range. The TG-610 enables finely detailed close-ups with decent sharpness and color fidelity.

So for portrait lovers and macro shooters, Olympus presents a more accommodating tool.

Landscape and travel: Dynamic range, resolution, and versatility

When I shot wide, expansive landscapes, both cameras’ 14MP sensors delivered ample resolution for decent 8x10 prints or web sharing. However, Olympus again gave a slight edge with its better dynamic range, thanks to more refined image processing on the TruePic III+.

Casio’s limited exposure compensation - in fact, none offered - restricts highlight and shadow control in high contrast scenes. Olympus’s spot metering plus exposure bracketing improves handling tricky light.

So, if you shoot outdoors often and like landscapes or urban travel photography with complex lighting, the TG-610 is more versatile.

The slightly larger body of the Olympus is still pocketable with a jacket or carry bag, and with a rated 210 shots per battery charge, offers more endurance than the Casio’s unknown stamina.

Lens focal coverage also matters: the TG-610’s longer telephoto end (140mm) helps capture distant landmarks or street scenes discreetly, while Casio’s zoom maxes out at 108mm.

Wildlife and sports: Track fast targets on the fly?

Neither camera is designed to compete with fast-action cameras offering complex phase-detection AF arrays or 10+ fps burst rates. But let’s see how they stack up for those quick moments.

Casio’s lack of continuous autofocus or tracking means you’ll struggle to maintain sharp focus on moving subjects - a big downside for wildlife or sports.

Olympus’s autofocus tracking helps a bit, but its 1 fps burst also limits your ability to capture sequences.

Low light AF performance suffers on both, with hunting common in dim venues or twilight. Neither offers aperture priority or manual modes to optimize shutter speed or ISO on the fly.

The Olympus’s ruggedness might tempt outdoor animal photographers who want durability, but you’d hit limits quickly on subject acquisition.

Street and candid: Discreteness, low-light ability, and portability

Street photographers often want small, unobtrusive gear that’s ready to shoot instantly.

Casio’s ultra-compact build and lighter weight provide superior discretion for those scenarios - you can keep it in the palm, stay quick on the draw, and blend in.

Its slightly faster wide aperture (F3.2) helps in natural light, and the basic sensor-shift image stabilization helps reduce blur handheld.

Olympus’s bigger size feels marginally more conspicuous, though its brighter, sharper screen aids composing on the move.

Both cameras suffer from limited ISO and noise control at higher settings, so low-light street scenes with quick action remain challenging.

Macro photography: Who gets up close and personal?

If close-up photography fascinates you, Olympus is the clear winner with its 3cm macro focusing distance and dedicated macro mode. The lens optics are optimized for sharpness at close range, giving crisp detail and delightful background softness.

Without a macro mode or close focusing on the Casio, getting tight shots is tricky and generally softer.

Night and astro shooting: The dim-light grind

Compact CCD sensors from this era are not renowned for excellent high ISO performance. Both cameras max out ISO between 1600-3200, but noise levels become intrusive at these extremes.

Neither camera supports manual exposure control or bulb modes, which limits long exposure flexibility crucial for astrophotography.

Still, sensor-shift image stabilization helps reduce blur for handheld night shots, and Olympus’s slightly wider aperture and better display aid setup.

Video capabilities: HD, stabilization, and audio

Both cameras support HD video but with a few caveats.

Casio’s maximum video resolution is 1280 x 720 at 20 fps, which is slightly jerky for video applications.

Olympus records 1280 x 720 at 30 fps and offers smoother motion capture.

Neither camera includes microphone or headphone ports, limiting audio adjustment, and stabilization during video is sensor-shift based - reasonable for casual clips but not pro standards.

Video format is Motion JPEG for both, leading to large file sizes and limited post-processing flexibility.

Connectivity and workflow: Memory, battery life, and sharing

Both cameras use SD/SDHC cards, with Olympus adding SDXC compatibility for larger memory cards.

Olympus TG-610 features Eye-Fi wireless card support, allowing transfer of images without cables - a boon if you want to share quickly on smartphones (with the right setup). Casio lacks any wireless connectivity.

Battery life stats favor Olympus at around 210 shots per charge. Casio’s figures are not officially rated, but user experience often reports weaker stamina, likely due to smaller battery capacity.

Neither camera supports USB 3.0 or HDMI output, so file transfers rely on older USB 2.0 speeds.

Summary of strengths and weaknesses

Casio EX Z800 screen back Olympus TG 610 front Olympus TG 610 screen back

Who should choose which camera?

• If you crave an ultra-slim, easy-to-pocket snapshot shooter for casual travel, street photography, or everyday use, the Casio EX-Z800’s compactness and punchy color rendering make it a great companion. Just temper expectations with its limited zoom and autofocus capabilities.

• If your photography involves outdoor adventures, close-up work, and you need durability plus a versatile zoom range, the Olympus TG-610’s weather sealing, better macro function, and improved screen provide a more flexible package. It better suits travel enthusiasts who need a robust second camera or beginners wanting rugged compact reliability.

• For portrait lovers and macro devotees, Olympus’s autofocus and zoom reach deliver more precise focus and pleasing depth control.

• For nightlife or astrophotography, neither camera will wow an expert, but Olympus’s superior sensor processing and screen make it more bearable.

Performance scores and genre breakdown

To give you clearer insight, I ran both cameras through a comprehensive testing protocol evaluating key photography genres and overall score.

These charts reveal the Olympus TG-610 consistently outperforms Casio’s EX-Z800 across most genres, particularly outdoor, macro, and travel photography. The Casio edges out slightly only in street portability and general snapshot ease.

Final verdict: Value for money with practical advice

Released at prices close to $150 for Casio and $223 for Olympus, the price difference reflects the ruggedness and advanced features of the TG-610.

If budget is tight and sheer portability is paramount, Casio remains a solid, no-frills choice. But if you want a camera that grows with your skills, survives the elements, and offers expanded creative scope - especially macro and telephoto reach - Olympus TG-610 is worth the premium.

Closing thoughts

I’ve personally enjoyed using both cameras for quick trips and casual projects. The Casio EX-Z800 packs surprising image quality for its tiny frame but reminds me that compactness comes with restrictions.

Meanwhile, the Olympus TG-610 feels like a tough companion for outdoorsy photographers who want a protective shell without lugging gear. It's no pro tool but shines in versatility and durability.

Your pick depends on balancing portability vs robustness, general casual shooting vs adventurous versatility. Either camera can produce satisfying photos if used within their limits and with realistic expectations.

I hope my detailed comparison has helped clarify these often-overlooked compacts’ strengths and weaknesses and points you toward the best match for your photography style.

Happy shooting!

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