| key specs | 
| Camera Type | DSLR Camera | DSLR Camera | 
| Effective Pixels | 12.3 MP | 24.2 MP | 
| Sensor Type | MOS | CMOS | 
| Display Type | LCD | - | 
| Display Size | 3 inch | 3.2 inch | 
| Battery Type | Lithium ion | Lithium ion | 
| Touchscreen | - | Yes | 
| general | 
| Brand | Olympus | Nikon | 
| Model | Pen E 12.3MP DSLR Camera | D5500 24.2MP DSLR Camera | 
| Model Name | Pen E | D5500 | 
| Model Number | E-PM1 | - | 
| Series | Pen | - | 
| Color | Silver & Black | Black | 
| Type | DSLR Camera | DSLR Camera | 
| Effective Pixels | 12.3 MP | 24.2 MP | 
| Dimensions(WxHxD) | 109.5 x 63.7 x 34 mm | 7.9 x 12.8 x 9.7 cm | 
| Weight | 265 GM | - | 
| Wide Angle | Yes | - | 
| Temperature | 0 to 40 | 0 to 40 | 
| SLR Variant | - | Body Only | 
| Tripod Socket | - | Yes | 
| Face Detection | - | Yes | 
| Lens Attachment | - | Body Only | 
| Accessory Shoe | - | ISO 518 Hot-shoe with Sync and Data Contacts and Safety Lock | 
| sensor features | 
| Sensor Type | MOS | CMOS | 
| Sensor Size | 33.86 mm | - | 
| ISO Rating | ISO 200 - 12800 | ISO 100 - 25600 | 
| Maximum ISO | 12800 ISO | - | 
| Maximum FPS | 5.5 | - | 
| Sensor Technology | High Speed Live MOS | - | 
| lens features | 
| Lens Type | Zoom Lens | - | 
| Lens Construction | 8 Elements in 7 Groups | - | 
| Focal Length | 14 mm - 42 mm 35 mm Equivalent to 28 - 84 mm | - | 
| Optical Zoom | 3x | - | 
| Aperture Range | F3.5 - F5.6 | - | 
| Color Filter | Primary RGB Color Filter | - | 
| Manual Focus | - | Yes | 
| Dust Reduction | - | Yes | 
| Other Lens Features | - | Lens Aperture Instant Return, Electronically-controlled, Compatible Lenses Autofocus is Available with AF-S and AF-I Lenses | 
| focus features | 
| Focus Mode | Auto, Manual | - | 
| Auto Focus | Yes | Yes | 
| Metering Modes | TTL 324 Zones Multi-pattern, ESP Light Metering, Spot Metering, Centre Weighted Metering | Matrix Metering 3D Color Matrix Metering II Type G, E and D Lenses, Color Matrix Metering II Other CPU Lenses, Center-weighted Metering Weight of 75% Given to 8 mm Circle in Center of Frame, Spot Metering Meters 3.5 mm Circle 2.5% of Frame Centered on Selected Focus Point, Matrix | 
| White Balancing | Auto, Preset Daylight, Lamp, Fluorescent, Flash, Cloudy, Shade, Underwater WB | White Balance Auto, Incandescent, Fluorescent 7 Types, Direct Sunlight, Flash, Cloudy, Shade, Preset Manual, All Except Preset Manual with Fine Tuning | 
| Other Focus Features | TTL Contrast Detection | AF-area Mode Single-point AF, 9-, 21- or 39- Point Dynamic-area AF, 3D Tracking, Auto-area AF, Face-priority AF, Wide-area AF, Normal-area AF, Subject Tracking AF, Focus Lock Focus can be Locked by Pressing Shutter Release Button Halfway Single-servo AF or by Pressing AE-L / AF-L Button, Autofocus Contrast Detect AF Anywhere in Frame Camera Selects Focus Point Automatically when Face-priority AF or Subject Tracking AF is Selected | 
| Focus Range | - | Detection Range -1 to +19 EV ISO 100, 20°C | 
| Focus Points | - | 39 or 11 Focus Points | 
| shutter features | 
| Shutter Speed | 1/4000 sec | - | 
| Self-timer | Yes | Yes | 
| Shutter Type | - | Electronically-controlled, Vertical-travel, Focal-plane Shutter | 
| Other Shutter Features | - | Frame Advance Rate 5 fps L Upto 3 fps, H Upto 5 fps JPEG and 12-bit NEF / RAW or 4 fps 14-bit NEF / RAW | 
| flash features | 
| Built-in Flash | Yes | Yes | 
| External Flash | Yes | - | 
| Flash Modes | Auto, Manual Full, 1/4, 1/16, 1/64, Red-eye Reduction, Slow Sync with Red-eye Reduction, Slow Sync, Slow Sync 2nd Curtain, Fill-in, Off | Auto, Auto with Red-eye Reduction, Auto Slow Sync, Auto Slow Sync with Red-eye Reduction, Fill-flash, Red-eye Reduction, Slow Sync, Slow Sync with Red-eye Reduction, Rear-curtain with Slow Sync, Rear-curtain Sync, Off | 
| Flash Compensation | - | 1/3 EV, 1/2 EV Steps in P, S, A, M and Scene Modes in -3 to 1 EV | 
| Other Flash Features | - | Built-in Flash Auto, Portrait, Child, Close-Up, Night Portrait, Party / Indoor, Pet Portrait, Super Vivid, Pop, Photo Illustration, Toy Camera Effect Auto Flash with Auto Pop-Up, P, S, A, M, Food Manual Pop-Up with Button Release, Guide Number 12/39, 12/39 with Manual Flash m/ft, ISO 100, 20°C, Flash Control TTL i-TTL Flash Control using 2016-Pixel RGB Sensor is Available with Built-in Flash i-TTL Balanced Fill-Flash for Digital SLR is Used with Matrix and Center-Weighted Metering, Standard i-TTL Flash for Digital SLR with Spot Metering, Flash-ready Indicator Lights When Built-in Flash or Optional Flash Unit is Fully Charged, Blinks After Flash is Fired at Full Output | 
| image features | 
| Image Format | RAW, JPEG, RAW+JPEG, MPO 3D Still | File Format NEF RAW 12-bit or 14-bit, Compressed, JPEG JPEG Baseline Compliant with Fine 14, Normal 18, Basic 116 Compression, NEF RAW + JPEG Single Photograph Recorded in Both NEF RAW and JPEG Formats, DCF 2.0, DPOF, Exif 2.3 | 
| Aspect Ratio | 43, 32, 169, 66, 34 | - | 
| Red Eye Reduction | Yes | Yes | 
| Image Stabilizer | Yes | - | 
| Image Sizing | 4032 x 3024 | 6000 x 4000 L, 4496 x 3000 M, 2992 x 2000 S | 
| Still Image Size | 4032 x 3024 | - | 
| Gross Pixel | - | 24.78 MP | 
| Live View Shooting | - | Yes | 
| display features | 
| Display Type | LCD | - | 
| Display Size | 3 inch | 3.2 inch | 
| Display Resolution | 460,000 dots | - | 
| LCD Display | LCD, Anti-reflection Coating | - | 
| LCD Display Image Resolution | 460000 dots | 1037000 dots | 
| LCD Display Video Resolution | 1920 x 1080 | 1920 x 1080 | 
| Touch Screen | - | Yes | 
| Other Display Features | - | Effective Angle of View Nikon DX Format, Focal Length Equivalent to 1.5x that of Lenses with FX Format Angle of View, Frame Coverage 95% Horizontal and 95% Vertical, Depth-of-field Preview Yes, Monitor TFT Vari-angle LCD Touch Screen, 100% Frame Coverage, Brightness Adjustment and Eye-sensor Controlled On / Off, Playback Full-frame and Thumbnail 4, 12, 80 Images or Calendar Playback with Playback Zoom, Movie Playback, Photo and Movie Slide Shows, Histogram Display, Highlights, Photo Information, Location Data Display, Auto Image Rotation, Picture Rating and Image Comment Upto 36 Characters | 
| connectivity features | 
| HDMI | Yes | - | 
| USB | Yes | - | 
| Wifi | - | Yes | 
| Wireless Connectivity | - | Yes | 
| storage and power features | 
| Upgradable Memory | Yes | Yes | 
| Card Type | SD / SDHC / SDXC / UHS-I | SD, SDHC UHS-I Compliant, SDXC UHS-I Compliant | 
| Battery Type | Lithium ion | Lithium ion | 
| Power Supply | - | EH-5b AC Adapter | 
| Other Storage Features | - | Card Slot Single | 
| audio and video features | 
| Microphone | Stereo | Built-in Microphone Stereo | 
| Audio Features | Dolby Digital, WAV | - | 
| Video Format | AVCHD, AVI Motion JPEG | MOV | 
| Audio Video Interface | Video Output NTSC, PAL | NTSC, PAL | 
| modes and functions features | 
| HD Support | Yes | - | 
| Shooting Modes | Portrait, e-Portrait, Landscape, Landscape with Portrait, Macro, Sport, Night Scene, Night with Portrait, Children, High Key, Low Key, DIS Mode, Nature Macro, Candle, Sunset, Document, Panorama, Fireworks, Beach and Snow, Fisheye Conv, Wide Conv, Macro Conv, 3D | - | 
| Macro Mode | Yes | - | 
| Scene Modes | - | Portrait, Landscape, Child, Sports, Close-up, Night Portrait, Night Landscape, Party / Indoor, Beach / Snow, Sunset, Dusk / Dawn, Pet Portrait, Candlelight, Blossom, Autumn Colors, Food, Special Effects Modes Night Vision, Super Vivid, Pop, Photo Illustration, Toy Camera Effect, Miniature Effect, Selective Color, Silhouette, High Key, Low Key | 
| viewfinder features | 
| View Finder | - | Yes | 
| Viewfinder Magnification | - | 0.82x 50 mm f/1.4 Lens at Infinity, -1.0 m -1 | 
| Viewfinder Eye Point | - | 17 mm | 
| Other Viewfinder Features | - | Diopter Adjustment -1.7 to 0.5 m-1 | 
| exposure features | 
| Exposure Compensation | - | 1/3, 1/2 EV in P, S, A, M, Scene and Night Vision Modes in Increments -5 to 5 EV | 
| Manual Exposure | - | Yes | 
| Other Exposure Features | - | Exposure Lock Luminosity Locked at Detected Value with AE-L / AF-L Button |