Olympus E-M10 IV vs Sony A68: A Hands-On Comparison for Discerning Photographers

In my 15+ years as a professional photography equipment tester, I’ve had opportunities to evaluate hundreds of cameras across genres and price points. Today, I want to examine two intriguing entry-level offerings from different eras and formats: the Olympus OM-D E-M10 IV mirrorless camera, released in 2020, and the older Sony SLT-A68 DSLR from 2015. Both cameras target enthusiasts stepping up from basic compacts or smartphones, but they manifest very different design philosophies, sensor sizes, and user experiences.

Having thoroughly tested and shot with both models under varied circumstances, this article dives deep into their real-world performance, technical nuances, and suitability across photographic applications. Whether you're a portraitist, landscape fanatic, wildlife shooter, or incoming video creator, I'll share candid insights to help you decide which camera might better fit your style and budget.

Body Design and Handling - Size, Build & Ergonomics

Right out of the gate, handling these cameras reminded me how much a camera’s physical presence impacts photographic enjoyment. The Olympus E-M10 IV is a compact mirrorless body built around the Micro Four Thirds system. It weighs a svelte 383g and measures a neat 122 x 84 x 49 mm. Meanwhile, the Sony A68, a DSLT variant with a larger APS-C sensor, feels more substantial at 610g and 143 x 104 x 81 mm dimensions.

This size and weight difference is quite palpable. The Olympus fits naturally in one hand, making it exceptionally travel-friendly and suitable for prolonged shoots without fatigue. The grip is well contoured for smaller hands and has a reassuring feel despite its lightness.

Sony’s heftier A68 offers a classical DSLR heft and sturdiness that some photographers favor for steady handheld shots, especially with sizeable telephoto lenses. However, I found its grip a bit bulkier, which may be less comfortable for smaller shooters or those seeking a more discreet setup.

A glance at their top plates reveals divergent design approaches:

The Olympus features a clean, minimalistic layout with a straightforward control ring and dial combo familiar to four-thirds users, boasting touchscreen operation on the rear LCD that greatly simplifies menu navigation. Conversely, the A68 sticks to traditional DSLR ergonomics with dedicated buttons and a smaller tilting screen lacking touch functionality, which feels dated by 2024 standards.

In short, if portability and intuitive touchscreen controls are priorities, the E-M10 IV scores high. For photographers wanting a classic DSLR feel and a more substantial grip, the Sony remains appealing.

Sensor Size and Image Quality - Resolving Power & Noise Performance

At the heart of every camera, the sensor reigns supreme in determining image fidelity and photographic flexibility. Both cameras sport CMOS sensors but differ markedly in size and resolution.

• Olympus E-M10 IV: Four Thirds sensor, 17.4 x 13 mm, 20 MP resolution
• Sony A68: APS-C sensor, 23.5 x 15.6 mm, 24 MP resolution

The Sony’s larger APS-C sensor area (366.6 mm² vs. 226.2 mm² for Olympus) theoretically offers an edge in light gathering, dynamic range, and shallow depth-of-field control. In my testing, this translated into cleaner images at high ISOs and finer gradations in shadow and highlight detail, especially noticeable in low-light indoor or evening scenes.

Color depth and dynamic range metrics from DxO (where available) further support these observations: the A68 scores a respectable 24.1 bits in color depth and 13.5 EV dynamic range, outperforming typical Four Thirds figures seen in the E-M10 IV’s class. While Olympus has not been officially tested by DxO on this model, its sensor lineage suggests good but comparatively limited capabilities in ultra-high fidelity.

The E-M10 IV’s 20MP sensor still delivers sharp, pleasing images with excellent color rendition, particularly under good lighting conditions. Its built-in 5-axis sensor stabilization boosts handheld sharpness, especially at slower shutter speeds.

In landscape photography especially, the higher resolution and sensor size of the Sony A68 provide more cropping flexibility and superior detail retention - an important factor for large prints or demanding post-processing workflows.

Viewing Experience - Viewfinder and Rear Screen

A photographer’s connection to their subject is often mediated through critical tools like the EVF or LCD. Both cameras feature electronic viewfinders, but with notable differences:

• Olympus: 2,360k-dot EVF with 100% coverage, 0.62x magnification
• Sony: 1,440k-dot EVF with 100% coverage, 0.57x magnification

The Olympus EVF delivers a bright, crisp preview image with appealing contrast. The higher resolution means easier manual focusing and framing precision, especially in tricky lighting.

The Sony’s EVF, while adequate, feels a bit dimmer and less resolving by comparison. Its resolution is acceptable for a mid-2010s model but noticeably outdated by current standards, potentially impacting critical focus checks.

On their backs, the Olympus offers a 3-inch tilting touchscreen with a high 1,040k-dot resolution - a joy to use for quick focusing and menu navigation. The Sony compensates with a 2.7-inch tilting LCD at only 461k dots and no touch support, meaning more button presses and slower adjustments.

For street photography or fast moving scenarios, the responsive touchscreen on the Olympus can make a significant difference in usability. The Sony’s more mechanical, traditional interface may suit DSLRs purists but is not as versatile for quick AF point changes during live view.

Autofocus Systems - Speed, Accuracy & Tracking

Autofocus performance can make or break a camera’s practical usability, especially in genres like wildlife and sports.

• Olympus E-M10 IV: 121 Contrast-detection AF points with face detection, no phase detection
• Sony A68: 79 AF points including 15 cross-type, hybrid phase + contrast detection

Sony’s SLT (Single-Lens Translucent) design employs a dedicated phase-detect AF sensor, yielding swift and confident focus locks. In wildlife and sports testing, the A68 consistently acquired and tracked moving subjects more reliably in daylight, thanks to this hybrid AF system. Burst shooting at 8 fps coupled with solid AF tracking made it a competent option for fast action.

Olympus relies entirely on contrast AF, which while accurate, can be slower and sometimes erratic in challenging lighting or rapid action. The E-M10 IV does benefit from a highly refined implementation with 121 AF points spread widely across the frame and face detection that works well for portraits and casual street shooting.

Neither model supports animal eye AF, a feature now common in modern cameras. However, for general portraits and non-professional wildlife, both deliver respectable eye and face detection accuracy.

If your photography involves fast-moving subjects, Sony’s hybrid AF system adds an edge. For general purpose use plus video and stills blending, Olympus’s AF is fine and simpler.

Lens Ecosystems and Compatibility

A camera is only as versatile as its lens selection. Both cameras belong to established systems.

• Olympus E-M10 IV: Micro Four Thirds mount; 107 native lenses available
• Sony A68: Sony Alpha/Minolta A mount; 143 lenses including legacy options

I tested both cameras with various primes and zooms during my review period. Olympus’ Micro Four Thirds lineup continues to impress me with its compact, optically excellent lenses - especially fast primes (e.g., 25mm f/1.8, 45mm f/1.8) that complement the small sensor beautifully and maintain portability. The smaller sensor crop factor of 2.1x means lenses yield effectively double focal lengths, practical for telephoto without huge lenses.

Sony Alpha mount lenses for the A68 cover a wide range, from older Minolta glass to modern G and Zeiss lenses. The 1.5x crop factor offers a versatile balance for portraits and landscapes without the aggressive reach of Micro Four Thirds.

The downsides? M43 lenses tend to be smaller but can be pricier; APS-C lens lineups are broader but often heavier. Also, Sony’s older A-mount system is less actively developed since the company’s mirrorless push began, potentially limiting future lens introductions.

Burst Shooting and Buffer Depth - Capturing the Decisive Moment

Both cameras offer roughly 8 frames per second continuous shooting - Olympus at 8.7 fps and Sony at 8 fps. In practice, the slight Olympus advantage is negligible.

Sony’s DSLR-style shutter and buffer handle sustained bursts a bit more confidently in JPEG shooting, especially when paired with a fast SD card. The Olympus buffer can fill quickly when shooting RAW at full speed, leading to brief pauses.

For birding or sports sequences requiring long burst captures, the Sony may edge ahead, but for casual action photography, both perform adequately.

Video Capabilities - Resolution, Stabilization, and Audio Controls

Video remains a strong point for mirrorless cameras generally, and here the Olympus shines:

• Olympus E-M10 IV: 4K UHD (3840x2160) at 30p/25p/24p, electronic 5-axis stabilization built-in, internal stereo mic, no mic/headphone jacks
• Sony A68: Full HD (1920x1080) max resolution, AVCHD and XAVC S compression, sensor-based stabilization, external mic jack, no headphone jack

The Olympus’s addition of 4K video support is a modern standard, delivering crisp footage with smooth stabilization benefiting handheld shooting. This is a huge asset for hybrid shooters or vloggers who want a compact device.

Sony’s video is limited to Full HD, sufficient for casual use but less future proof. However, external microphone support allows better audio quality, which serious videographers might appreciate.

Neither model offers 4K photo modes or advanced video features such as log profiles or slow motion, aligning them clearly with entry-level rather than pro video users.

Specialized Photography Applications

Portrait Photography

Olympus’s face and eye detection AF combined with pleasing Micro Four Thirds bokeh produce flattering portraits, despite the smaller sensor’s depth-of-field limits. Its color science renders skin tones quite natural. The more compact lens packages encourage interaction, great for street portraiture.

Sony’s APS-C sensor creates more pronounced background separation and superior dynamic range, enhancing portrait quality especially in studio or controlled lighting. Faster, more precise AF tracking helps capture fleeting expressions sharply.

Landscape Photography

The Sony’s larger sensor and 24MP resolution offer raw data files with better detail retention ideal for landscapes. Higher dynamic range preserves more shadow and highlight detail in scenes with challenging contrast.

Olympus performs admirably in good light, but its smaller sensor area limits ultimate image quality for critical print sizes. Lack of weather sealing on both cameras means caution outdoors.

Wildlife and Sports

The Sony A68’s hybrid AF and faster burst shooting provide a clear edge capturing rapid movements. The lens crop factor of 1.5x gives good telephoto reach with manageable lens sizes.

Olympus’s contrast AF and smaller sensor make it less suited for demanding action work, but its stabilization helps reduce camera shake with long lenses on stationary wildlife.

Street Photography and Travel

Lightweight and compact, the Olympus is my favorite for street and travel where discretion, comfort, and quick operation matter. The touchscreen AF point control and silent electronic shutter make it less conspicuous.

Sony’s larger size and louder shutter noise can draw more attention, but its robust battery life (510 shots vs. Olympus’s 360) can be advantageous on longer trips.

Macro and Night Photography

For macro, Olympus benefits from the 5-axis stabilization enabling tack-sharp handheld close-ups, supported by numerous micro four thirds macro lenses. The Sony can deliver higher detail but with less stabilization assistance.

In night and astrophotography, the Sony’s low light ISO performance and dynamic range shine, although neither camera specializes heavily here.

Battery Life and Storage Flexibility

Sony’s DSLR-style NP-FM500H battery delivers approximately 510 shots per charge, well above the Olympus’s 360 shot rating on its BLS-50 battery. This is typical of mirrorless vs DSLR battery differences.

Both cameras accept SD cards (UHS-II supported on Olympus), though Sony also supports Memory Stick Pro Duo, a legacy format.

On trips without frequent charging opportunities, Sony’s longer battery life is a practical advantage.

Connectivity and Extras

Olympus offers built-in Wi-Fi and Bluetooth for seamless image transfer and remote control via smartphone apps - a modern user convenience.

Sony supports Eye-Fi connectivity but lacks Bluetooth and NFC, which might limit wireless connectivity options in 2024.

Neither camera includes GPS, weather sealing, or articulated top displays.

Pricing and Value Considerations

At an MSRP near $699 and typical street prices around $600-$700, the Olympus E-M10 IV is positioned as a stylish, accessible mirrorless option. The Sony A68, typically found for around $580, remains a budget DSLR contender, especially appealing for those prioritizing sensor size and classic handling.

Balancing raw performance, features, and system longevity, the Olympus’s 4K video, touchscreen, and compactness justify its slightly higher cost if those matter. Conversely, if sensor size, battery life, and lens variety weigh more in your calculus, Sony’s offering remains a solid value.

Olympus E M10 IV front Olympus E M10 IV screen back Sony A68 front Sony A68 screen back

Final Thoughts - Who Should Choose Which?

After extensive hands-on comparison using my standard testing protocol in studio, daylight, indoor, and action scenarios, here’s how I’d advise different users:

• The Traveler and Street Shooter will adore the compact build, intuitive touchscreen, in-body stabilization, and 4K video of the Olympus E-M10 IV. Its discrete size and lighter lenses empower exploration without bulk.

• The Landscape Enthusiast or Portrait Artist seeking maximum image quality and depth will appreciate the Sony A68’s larger APS-C sensor and richer files. Its longer battery life supports fieldwork where charging is scarce.

• The Enthusiast Sports or Wildlife Photographer should lean toward the Sony for its hybrid AF tracking and faster burst depth, critical for capturing split-second action.

• The Budget-Conscious Newcomer focusing on video coupled with stills might prefer Olympus’s modern shooting conveniences and versatility despite the smaller sensor.

In transparent honesty, both cameras reflect their generation’s design priorities rather than being contemporaneous rivals. I have no financial ties to either Olympus or Sony, ensuring my conclusions stem from objective testing and user-focused observation.

Practical Tips If You Choose the Olympus E-M10 IV

• Pair with fast primes (25mm or 45mm f/1.8) to maximize portrait quality despite smaller sensor.
• Use the silent electronic shutter for street photography to avoid drawing attention.
• Tap into in-body stabilization to shoot handheld in low light.
• Remember battery life is limited; carry an extra spare for heavy shoot days.

Practical Tips If You Choose the Sony A68

• Take advantage of the hybrid AF system for tracking moving subjects.
• Use external mic inputs for improved audio in video projects.
• Favor APS-C-optimized lenses for best sharpness and speed.
• Benefit from longer battery life for extended shooting sessions.

A Photographer’s Perspective

Choosing between the Olympus OM-D E-M10 IV and Sony SLT-A68 involves weighing your priorities: sensor size and robust DSLR ergonomics vs compactness, modern controls, and video features. Both cameras are capable, enjoyable tools that can suit enthusiasts and learning professionals alike.

My advice: spend time holding and shooting with both if you can. Assess which system’s handling, lens options, and workflow resonate with your photographic passions. Whether wandering city streets or chasing wildlife, both cameras hold potential to help you capture meaningfully beautiful moments.

Happy shooting!

If you have questions about specific scenarios or want lens recommendations for either system, feel free to reach out in the comments below.