Olympus E-PM1 vs Pentax KP

Olympus E-PM1 vs Pentax KP: A Deep Dive into Two Distinct Cameras Across the Photography Spectrum

Choosing your next camera is a nuanced journey, especially when the options straddle different categories and eras. Today, we put the Olympus PEN E-PM1 - a compact entry-level mirrorless from 2011 - face-to-face with the Pentax KP, a robust mid-sized DSLR launched in 2017 aimed at enthusiasts seeking durability and performance. While these cameras hail from different segments and technology generations, understanding their real-world strengths and limitations will empower you to find the right tool tailored to your unique photography ambitions.

Bringing over 15 years of hands-on experience testing and comparing cameras across genres, I’ll share insights grounded in rigorous field tests and technical analysis to compare these models head-to-head. We’ll unpack everything from sensor characteristics and autofocus to ergonomics, value, and suitability for genres spanning portraits to astrophotography. Let’s start by sizing them up and laying out their visual and tactile differences.

Hand in Hand: Physical Ergonomics and Build Quality

Despite the Olympus E-PM1’s mirrorless design versus the KP’s DSLR heritage, their size contrast is quite stark. The Olympus feels almost pocketable - a compact rangefinder-style body measuring a trim 110 x 64 x 34 mm and weighing under 270 grams. The Pentax KP more than doubles that footprint at 132 x 101 x 76 mm and 703 grams, asserting itself as a genuine mid-sized SLR with more substantial handling.

Handling these side by side, the E-PM1’s petite frame fits easily in smaller hands or a jacket pocket, making it a low-profile travel companion. Yet, this economy sacrifices a certain grip confidence - longer shooting sessions or heavier lenses begin to feel fatiguing. Meanwhile, the KP’s chunky, rugged chassis offers a more secure hold, complete with an active weather-sealed design that shields from moisture and dust - essential for outdoor and adventure photography that doesn’t flinch at rough conditions.

Build quality also diverges here. The Olympus relies on lighter plastics, fitting for an entry-level system, while the KP uses a magnesium alloy alloyed with polymer reinforcements, yielding a sturdiness that feels reassuringly professional. Bottom line: for those valuing portability and lightness, the E-PM1 charms, but for toughness and extended comfort, the KP clearly wins the ergonomics battle.

Looking closer at layout, the top control arrangement is concise on the Olympus, favoring simplicity ideal for newcomers. In contrast, the KP’s top deck is busier, with dedicated dials and buttons putting manual exposure, ISO, and drive modes at your fingertips - a boon for photographers who appreciate tactile control.

Behind the Glass: Sensor Technology and Image Quality

No camera comparison is complete without dissecting the sensor and image quality, and here the gulf between the E-PM1 and KP truly widens.

The Olympus E-PM1 sports a Four Thirds sensor sized at 17.3 x 13 mm, with a resolution capped at 12 megapixels. This sensor has a crop factor of 2.1x, constraining wide-angle framing but lending some telephoto advantage. The sensor is backed by the TruePic VI image processor, which was a solid performer back in 2011 but now shows its age.

Pentax’s KP boasts a more modern APS-C sensor - 23.5 x 15.6 mm, yielding around 367 mm², over 60% larger in surface area than the E-PM1. It packs double the pixel count at 24 megapixels with a 1.5x crop factor, balancing detail and cropping flexibility. The KP utilizes the PRIME IV processor, which offers improved noise handling, color rendition, and dynamic range over several generations of back.

In practice, this translated on my tests to the KP producing significantly cleaner images at higher ISOs, as well as more detail-resolving power - particularly noticeable in landscape shots with intricate foliage or urban textures. The Olympus sensor’s smaller size and older tech yield earlier onset of noise beyond ISO 800, limiting low light usability without resorting to flash.

Dynamic range evaluation shows the KP’s sensor capturing roughly a stop more latitude, providing more recoverable detail in shadows and highlights - a critical advantage for scenes with challenging contrast. The E-PM1’s four-thirds sensor is notably more limited in this respect, often clipping highlights in bright skies or losing detail in shaded areas.

The Viewfinder and Screen: Composing and Reviewing Shots

Since composition and review are core to the shooting experience, the two cameras’ approaches to viewfinders and LCDs merit focused attention.

Olympus outfitted the E-PM1 with just a fixed 3” LCD screen sporting a modest 460k dots resolution and a HyperCrystal AR coating designed to reduce reflections. It lacks any built-in viewfinder, though an optional accessory electronic finder was available. The fixed screen offers limited flexibility in framing from hard angles or elevated positions.

The Pentax KP, on the other hand, features a bright, tilting 3” LCD with a much higher resolution of 921k dots - a notable upgrade for reviewing images and composing at odd angles. Though it doesn’t have a touchscreen, the tilt mechanism aids shooting from low or high perspectives, essential in macro or street photography.

Optically, the KP includes a large pentaprism viewfinder with 100% coverage and 0.63x magnification - highly valued by DSLR users for real-time, lag-free composition under all lighting conditions. The E-PM1’s absence of an EVF puts it at a disadvantage in bright daylight or fast-action shooting, requiring constant reliance on the LCD, which can be challenging outdoors.

Autofocus Systems: Speed, Accuracy and Tracking

AF technology is a decisive battlefield differentiating these two cameras.

The Olympus E-PM1 uses a contrast-detect AF system with 35 focus points - a respectable number for its class but inherently slower and less precise in dynamic scenarios. It supports face detection and continuous AF modes, but phase detection is absent, limiting responsiveness, particularly in low light or for moving subjects.

In contrast, the Pentax KP employs a 27-point SAFOX 11 autofocus system, with an impressive 25 cross-type points. While not cutting-edge by DSLR standards today, it remains robust with centered phase detection sensors and refined algorithms, delivering faster acquisition, better tracking of subjects in motion, and more reliable focus lock in lower lighting.

Face detection is also included on the KP, along with customizable AF area selection. Continuous AF and tracking modes elevate its suitability for action, wildlife, and sports photography compared to the E-PM1’s more leisurely system.

Burst Shooting and Shutter Performance

When speed counts - such as in sports or wildlife - the frame rate and shutter capabilities become crucial.

The Olympus E-PM1 manages 6 frames per second (fps) in continuous shooting mode, which remains competitive even today in some entry-level mirrorless models. Its mechanical shutter caps at 1/4000s, sufficient for most daylight and action uses though lacking an electronic shutter option.

The Pentax KP shoots at 7 fps - a modest edge - plus it adds a super-high silent electronic shutter mode capable of 1/24000s for ultra-fast exposures and near-silent shooting. This floodlights options in bright light or stealth environments like concerts or street candid shots.

Maximum shutter speeds, drive modes, and buffer depth on the KP give it a slight advantage for professionals chasing decisive moments.

Lens Ecosystem and Compatibility

Lens options directly affect a camera’s creative possibilities.

Olympus adheres to the Micro Four Thirds system, boasting a rich stable of over 100 native lenses - from sharp primes and versatile zooms to specialty glass like macro and fisheye. The smaller sensor size and 2.1x crop factor tend to yield compact lenses with price and weight advantages. Image stabilization is sensor-based in both systems, making them versatile with any lens mounted.

Pentax’s KAF2 mount mirrors a traditional DSLR approach with over 150 lenses including moderate primes, telephotos, and ultra-wide zooms. The APS-C sensor’s 1.5x crop factor balances reach and wide-angle options well and inherits compatibility with a long lineage of K-mount heritage glass. Weather sealing extends to many of Pentax’s lenses, complementing the KP body’s ruggedness.

Both offer excellent lens ecosystems, although Micro Four Thirds lenses often shine in portability and autofocus quietness, while Pentax lenses provide more variety for professional-grade optics and manual focus richness.

Battery Life and Storage

From dusk till dawn shooting demands endurance.

The Olympus E-PM1 rated 330 shots per charge - a reasonable figure but modest by modern mirrorless standards. It accepts SD/SDHC/SDXC cards in a single slot. Similarly, the Pentax KP extends this to roughly 390 shots per battery cycle and supports UHS-I cards for faster write speeds.

Neither camera offers dual card slots, a consideration for professionals who want instant backup. Pentax also offers optional GPS accessories to augment workflow - a feature absent in Olympus’ setup.

Connectivity and Extras

When it comes to connectivity, the Olympus E-PM1 doesn’t support Wi-Fi, Bluetooth, or NFC - limitations rooted in its release period. It does provide an HDMI port and USB 2.0 port.

By contrast, the Pentax KP includes built-in wireless connectivity (Wi-Fi), facilitating faster image transfer and remote control, a convenient feature for modern workflows albeit it lacks Bluetooth or NFC.

Flashes and lighting control also differ: the KP includes a built-in flash with broad mode support including manual and wireless triggering, while the E-PM1 relies exclusively on external flashes.

Genre-Specific Performance: How Do They Shine in Real Photography Situations?

Having drilled down the specs and tech, how do these cameras actually perform across main photography disciplines?

Portrait Photography

The Olympus E-PM1 delivers charming skin tones with its older sensor and genuine Micro Four Thirds color science, though resolution limits fine detail capture - something portrait pros running retouch workflows may note. Bokeh is softer due to sensor size and lens aperture limits; however, eye detection autofocus works reliably within its face detection system.

The KP doubles the pixel count, rendering crisp portraits with ample detail to crop or print large. Its 5-axis stabilization helps with handheld shots, and fast, multi-cross point AF with face detection ensures sharp eyes and subject tracking even with moving models or children.

Landscape Photography

Here, the KP’s APS-C sensor and superior dynamic range genuinely shine, recovering highlight and shadow detail in scenes with sprawling skies or shadow-rich forests. Its robust weather sealing lets you shoot in harsher environments without fear. The tilting high-res LCD aids composition from challenging angles.

The E-PM1, while compact and nimble for hiking, shows limited dynamic range, often clipping skies or losing detail in shadows, resulting in the need for HDR bracketing or post-processing compromises.

Wildlife Photography

Tracking speed and burst rate favor the Pentax KP’s faster AF system and 7 fps continuous shooting. Combined with a broad lens selection for telephoto reach and weather sealing, it suits wildlife photographers willing to brave the elements.

The Olympus E-PM1’s contrast-detect AF and lower continuous speed present challenges for fast-moving animals, limiting its effectiveness here.

Sports Photography

Similar to wildlife, the KP holds an edge with quicker shutter speeds up to 1/24000s, silent shutter mode for stealth, and robust AF tracking. Its buffer and frame rates capture decisive moments in action sports.

The E-PM1, while decent at 6 fps, tends to falter in continuous AF responsiveness and suffers more at higher ISOs in dimly lit sports halls.

Street Photography

The E-PM1’s petite size and discreet profile make it attractive for street shooters desiring lightweight gear to blend in easily. However, lack of an EVF and moderate LCD resolution can hinder composition in bright daylight.

The KP’s weather sealing and versatile shooting modes help in variable street conditions, but the larger body and louder shutter may draw more attention.

Macro Photography

Macro demands precision autofocus and stabilization. The KP’s 5-axis sensor stabilization and tilt screen give advantages for stationary close-ups, with excellent manual focus aids.

The Olympus can manage respectable macro shots but lacks focus bracketing or stacking options, and stabilization isn’t as sophisticated.

Night and Astrophotography

The KP’s significantly superior high-ISO performance and dynamic range make it a better candidate for moonlit landscapes or star fields. Its shutter capabilities and focus bracketing add creative tools for long exposures.

The E-PM1’s higher noise and limited ISO sweet spots constrain night shooting, making it a secondary choice here.

Video Capabilities

Both cameras top out at 1080p video at 60 fps (E-PM1) and 60i/30p (KP). The Olympus offers AVCHD and Motion JPEG, while the KP uses MPEG-4/H.264.

Neither has 4K or microphone/headphone ports (except KP has mic in), limiting video enthusiasm. However, the E-PM1’s sensor stabilization helps handheld video, a plus for casual shooters.

Travel Photography

Lightweight and compact, the E-PM1 excels for travelers with minimal kit needs and reliable battery life. The KP’s superior image quality and ruggedness appeal to those who prioritize durability and environmental resilience.

Overall Performance Scores and Genre Ratings

A visual summary underscores the KP’s dominance as a versatile advanced camera, balanced by the E-PM1’s compactness and simplicity.

The Verdict: Who Should Choose Which?

Breaking the matchup down by user type and finance:

• Beginners on a budget or casual shooters: The Olympus E-PM1 offers an affordable, pocket-size stepping stone into interchangeable lens photography, with image stabilization, decent AF, and a friendly interface. Great for travel, street, and everyday snaps where size and simplicity matter.

• Enthusiasts and professionals needing durability and versatility: The Pentax KP provides superior image quality, weather sealing, more sophisticated AF, and manual controls. Its high ISO prowess, expanded lens support, and ruggedness suit portraits, landscapes, wildlife, and low-light work.

• Portrait and landscape photographers: KP’s sensor and dynamic range make it the natural choice.

• Sports and wildlife shooters: Faster AF, burst, and shutter speed favor the KP.

• Travel and street shooters valuing discretion: E-PM1’s compact frame shines, with tradeoffs in image quality.

• Budget-conscious video hobbyists: Neither shines in video, but E-PM1 offers easier stabilization.

Final Thoughts

These two cameras exemplify different eras and philosophies in camera design. The Olympus PEN E-PM1 is the quintessential early mirrorless champion - compact, light, and straightforward, but limited by dated sensor tech and slower performance. The Pentax KP is a modern DSLR crafted for enthusiasts who demand resilient build, refined responsiveness, and stellar image fidelity, even at the cost of heft and expense.

In my hands-on experience spanning both, the camera that suits you depends on your priorities: portability and pocketability, or pro-grade build and image quality. Armed with these insights, you can confidently match your next camera to your photographic ambitions, no matter the genre.

Sample Images from Both Cameras: Clarity, Color, and Detail at a Glance

Olympus E PM1 screen back Pentax KP front Pentax KP screen back

Whether you lean towards Olympus’s compact charm or Pentax’s rugged prowess, direct examination of image samples is vital to feel how each camera renders texture, color fidelity, and tonal depth in your preferred scenarios.

I hope this deep-dive guide helps you navigate your photographic path clearly and confidently. Happy shooting!