Canon EOS Rebel T6i vs Canon PowerShot A3400 IS: An Expert Comparison to Guide Your Next Camera Purchase

In my 15+ years of testing cameras across all genres - from studio portraits to remote wildlife photography - I’ve developed a nuanced appreciation for how specific camera features and performance translate into real-world results. Today, I’m diving deep into two very different offerings from Canon: the Canon EOS Rebel T6i (known also as the EOS 750D or Kiss X8i in certain markets), and the compact point-and-shoot Canon PowerShot A3400 IS.

While both bear the Canon badge, they serve dramatically different audiences and photographic ambitions. The T6i, released in early 2015, is an entry-level DSLR that aims to offer enthusiast-grade features at a budget-friendly price. The A3400 IS, on the other hand, launched back in 2012, is a modest compact camera focused on simplicity and portability.

Given the 3-year gap and the divergent categories, you might wonder - how do they truly compare? Which circumstances call for the T6i’s interchangeable lens system and advanced controls? When might the A3400 IS’s small size and straightforward operation be enough? I’ll unpack every facet, anchored by my hands-on tests, exhaustive technical analysis, and measured real-world use.

Let’s get started by sizing them up - literally and figuratively.

Size and Handling: DSLR Bulk Meets Compact Convenience

I’ve always noticed how physical form factor affects not only comfort but shooting style and mobility. The Canon T6i is a traditional DSLR with a moderately sturdy magnesium-alloy and polycarbonate body. Despite being entry-level, it’s relatively compact and light for a DSLR, weighing 555 grams and measuring 132 x 101 x 78 mm. In comparison, the A3400 IS is a pocket-friendly compact at just 126 grams and 94 x 56 x 21 mm, easily tucked into a jacket pocket or small bag.

Handling-wise, the T6i feels solid with a substantial grip comfortable for prolonged shooting sessions. The ergonomics support varied hand positions, allowing for confident use of the DSLR’s manual controls. In contrast, the A3400 IS emphasizes minimalism - its small grip limits one-handed stability for anything beyond casual snapshots.

If you prioritize portability or want a dedicated travel camera with zero setup fuss, the A3400 IS shines. But for those demanding tactile control, longer shooting days, and lens flexibility, the T6i’s form factor is better suited despite its heft.

Design and Controls: Intuitive Layout vs. Simplified Interface

Looking from above, the differences extend beyond size. The T6i sports a clear and logical DSLR control layout with a top LCD panel (though unlit), shutter dial with multiple modes - including aperture and shutter priority settings - and dedicated buttons for key functions like ISO, white balance, and drive modes.

The A3400 IS pares controls aggressively. It has a mode dial only for automatic and some scene modes, plus a few buttons for flash and playback. Aperture, shutter speed, or ISO prioritization is not possible; exposure compensation is entirely absent. The experience is primarily point-and-shoot with some touch-control enhancements on the small fixed LCD.

For photographers who want to learn exposure control, the T6i clearly offers a richer playground. Beginners or casual snappers might appreciate the simplicity of the A3400 IS despite its limited input options.

Sensor Technology and Image Quality: APS-C Triumphs Over Small Sensor

One decisive factor separating these two is their sensor size and technology. The T6i uses a 22.3 x 14.9 mm APS-C CMOS sensor with 24 megapixels, while the A3400 IS relies on a tiny 1/2.3-inch CCD sensor at 16 MP resolution.

The sensor area difference (332.27 mm² vs 28.07 mm²) dramatically influences dynamic range, noise performance at high ISO, and overall image fidelity. In real-world use, the T6i produces rich detail, vibrant colors, and excellent skin tone gradations. Even at ISO 1600 and 3200, files remain clean enough for quality prints. The smaller sensor A3400 IS struggles beyond ISO 400, with pronounced noise and muffled detail, typical for compact cameras in this category.

Canon’s DIGIC 6 processor in the T6i further enhances noise reduction and color science, in ways the A3400 IS cannot match given its older hardware.

Viewing Experience: Optical Viewfinder vs Screen Only

Another major difference is the method of framing. The T6i offers a clear optical pentamirror viewfinder covering about 95% of the scene with 0.51x magnification, critical for shooting in strong sunlight or capturing quick wildlife moments where lag-free composure matters.

The A3400 IS has no viewfinder. Its 3-inch fixed LCD with a modest 230k-dot resolution offers a live preview only. This works sufficiently indoors or shaded environments but is difficult to rely on under strong sunlight.

The T6i flips this script with a versatile fully articulating 3-inch touchscreen at 1,040k dots - vastly superior for live focus, menu navigation, and video framing. Touch AF and selfie-friendly screen rotations are a major boost for both novice and enthusiast shooters.

Autofocus Systems: Precision vs Point-and-Shoot Convenience

Autofocus often makes or breaks the photo opportunity. The T6i boasts a 19-point all cross-type AF system with dual pixel CMOS AF technology for smooth and precise live view focusing, face detection, and decent subject tracking. It works well in diverse settings - from portraits to sports and even macro shots, with accurate eye detection.

The A3400 IS relies on a rudimentary 9-point contrast-detection AF with center-weighted priority. It is slower and less reliable in low contrast or low light scenarios. Tracking subjects and continuous autofocus modes are basic at best.

For action or wildlife photographers, the T6i’s AF system is substantially superior. Casual photographers shooting static subjects will find the A3400 acceptable though increasingly frustrating in challenging conditions.

Burst Shooting and Video Capabilities: Entry DSLR Triumphs Again

In burst mode, the T6i offers a respectable 5 frames per second (fps) continuous shooting, adequate for capturing sports or wildlife sequences at moderate speed. The A3400 IS is limited to 1 fps, essentially single-shot operation.

The video capabilities also show a divide. The T6i delivers Full HD 1080p video at 30fps, with manual controls, external microphone input, and reliable autofocus tracking during filming. It supports MPEG-4 and H.264 codecs, making it versatile for vloggers and hybrid shooters.

The A3400 IS maxes out at 720p HD video at 25fps, with no microphone input and minimal manual control. Video is serviceable for casual use but quickly shows noise and softness in dim environments.

Lens Ecosystem and Zoom Versatility

One undeniable strength of the T6i is its Canon EF/EF-S lens compatibility. With over 300 lenses available - including ultra-wide, telephoto, prime, macro, and specialty optics - the creative possibilities are immense. From full-frame L-series primes to budget-friendly zooms, the T6i can adapt to virtually any photographic discipline.

The A3400 IS has a fixed 28-140mm equivalent zoom (5x optical) with an aperture range of f/2.8-6.9. It covers normal shooting distances but cannot be swapped for specialized optics. This limits creative control but appeals to shooters wanting a simple, all-in-one solution.

Battery Life and Storage: DSLR Advantages

The T6i uses the LP-E17 battery that delivers roughly 440 shots per charge per CIPA standards - sufficient for a day’s outing or extended travel photography sessions. The A3400 IS’s NB-11L battery offers only about 180 shots per charge, necessitating frequent battery swaps or power options for longer shoots.

Both accept SD, SDHC, and SDXC cards with a single card slot - standard but effective.

Build Quality and Environmental Resistance

Neither camera is weather sealed or ruggedized; however, the T6i’s robust build feels more resistant to everyday bumps and wear. The A3400 IS is a basic compact, fitting more comfortably into casual environments rather than rugged adventure.

Connectivity and Ergonomics for Modern Workflows

The T6i features built-in Wi-Fi and NFC, allowing for easy wireless image transfer and remote control via Canon’s smartphone app - a boon for social media sharing and remote shooting.

The A3400 IS has no wireless connectivity, requiring manual USB transfers.

With a fully articulating touchscreen and customizable buttons, the T6i offers a modern interface optimized for efficiency. The A3400 IS’s minimal touchscreen capabilities feel limiting but understandable given the camera’s age and category.

Real-World Shooting Across Genres: Practical Observations

Portrait Photography

The T6i shines with accurate skin tone rendition, pleasing color depth, and creamy natural bokeh when paired with fast prime lenses. Its face detection autofocus is reliable, and eye AF, while not professional level, aids in sharp portraits.

The A3400 IS’s depth of field is deeper due to the small sensor and slower lens, resulting in less background separation and flatter rendition. Skin tones can appear washed out or overly soft under artificial lighting.

Landscape Photography

The T6i’s resolution and RAW capability produce highly detailed images with up to 12 stops of dynamic range. Weather sealing is absent, so light rain requires caution, but its sensor data flexibility gives latitude for exposure blending. Combined with quality wide-angle lenses, it is excellent for landscapes.

The A3400 IS’s small sensor limits dynamic range, and JPG-only capture reduces post-processing freedom. Softness at wide apertures and noise in shadows are common. It can perform for casual snapshots but won’t satisfy serious landscape photographers.

Wildlife and Sports

Burst speed, continuous AF, and tracking matter here. The T6i’s 5 fps and 19-point cross-type AF facilitate decent action shots, though high-end enthusiasts will seek faster bodies. Paired with telephoto lenses, it can tackle many wildlife or sports events in moderate light.

The A3400 IS is too slow and limited for dynamic subjects. Its zoom range is insufficient for distant wildlife.

Street and Travel Photography

The A3400 IS is ideal for discreet shooting due to small size and quiet operation. However, limited manual control reduces creative control for street artists.

The T6i is bulkier but balances better if equipped with an all-purpose zoom. The articulated touchscreen aids in awkward shooting angles - a plus for travel. Battery life is also an asset for daily excursions.

Macro Photography

Without dedicated macro lenses, the T6i still offers excellent precision focus at close distances, plus better depth control. The A3400 IS can focus down to 3 cm but lacks stabilization and precise AF control.

Night and Astrophotography

T6i’s higher native ISO and RAW support enable longer exposures and effective noise reduction, essential for night sky photography. The A3400 IS’s limited ISO range and noise performance restrict utility here.

Video

Enthusiasts will find the T6i’s full HD, adjustable exposure, microphone socket, and dual pixel AF tailored to video production, while the A3400 IS is suited only for casual HD clips.

Performance Scores Summed Up

For a numerical perspective, DxOMark gives the T6i an overall score of 71, including strong dynamic range (12.0 EV) and color depth (22.7 bits). The A3400 IS is untested there but would score substantially lower due to sensor limitations.

When we examine genre-specific performance, the T6i dominates in most fields - from portraits to sports - as a true all-rounder entry-level DSLR.

Sample Image Comparison: Visual Evidence

Comparing raw sample images from both cameras side by side embodies the differences: The T6i shows refined textures, vibrant color fidelity, and sharp detail at pixel level, with smooth bokeh and accurate exposure.

The A3400 IS’s samples are softer with visible noise, with narrower dynamic range and muted colors - perfectly acceptable for casual use but less suitable for print or editing.

Canon T6i front Canon T6i screen back Canon A3400 IS front Canon A3400 IS screen back

Final Thoughts: Who Should Buy What?

Choose the Canon EOS Rebel T6i if you:

• Are an enthusiast looking for serious photographic growth with flexibility
• Want access to a robust lens ecosystem and manual control
• Shoot diverse genres including portraits, landscapes, wildlife, and video
• Need better image quality, dynamic range, and low-light performance
• Require modern connectivity like Wi-Fi and NFC for smartphone integration
• Don’t mind carrying a DSLR and investing in lenses over time

Opt for the Canon PowerShot A3400 IS if you:

• Want a straightforward, pocketable camera for casual everyday shooting
• Prioritize ease of use with no fuss about exposure settings or lenses
• Are on a tight budget or want a simple travel companion for snapshots
• Primarily take photos in good light and do not require HD video beyond basics
• Need a camera that fits in your coat pocket or small handbag

Closing Reflections from My Testing Experience

Having spent days in the field with both cameras - from bustling city streets to quiet forest trails - the T6i clearly empowers me to create consistent, compelling images thanks to its sensor size, control flexibility, and robust autofocus. The A3400 IS, though modest, delivers on convenience and simplicity that some users deeply appreciate.

If you’re serious about photography and foresee growing as an artist or professional, the Canon T6i remains a cost-effective gateway into the DSLR world, pairing classic Canon imaging heritage with useful modern features. But if your priority is ultra-portability and uncomplicated operation with occasional snapshots, the A3400 IS is a friendly, no-pressure companion.

I hope this comparison provides you with honest, detailed insights drawn from direct experience, helping you confidently select the Canon that best suits your photographic journey.

Disclosure: I have no commercial affiliations with Canon; all testing and analysis were conducted independently across controlled and real-life environments.