In depth comparison and review of Sony Alpha7R IV ILCE-7RM4 and Sony Alpha6600 ILCE-6600M + E 18-135mm OSS. Compare design, sensors, proximity features, memory capacities and other important specifications and features to easily choose the right camera for you. Our goal is to help you uncover differences between the products and find the digital camera that will best fit your needs.
| DESIGN AND DIMENSIONS | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Product Type | Digital camera - 4K - mirrorless system | Digital camera - 4K - mirrorless system |
|---|---|---|
| Lens Included | Body only | E 18-135mm OSS lens |
| Height | 9.64 cm | 6.69 cm |
| Width | 12.89 cm | 12 cm |
| Depth | 7.75 cm | 6.93 cm |
| Weight | 665 g | 418 g |
| Weight Details | Camera body only: Camera with battery and memory card: 665 g |
Camera body only: 418 g Camera with battery and memory card: 503 g |
| Body Material | - | Magnesium alloy |
| Enclosure Colour | Black | Black |
| Protection | - | Dust-resistant, moisture-resistant |
| Digital Zoom | - | 4x |
| Optical Zoom | - | 7.5x |
| SENSOR | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Sensor Resolution | 61 Megapixel | 24.2 Megapixel |
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| Optical Sensor Type | Exmor R CMOS | Exmor CMOS |
| Total Pixels | 62,500,000 pixels | 25,000,000 pixels |
| Effective Sensor Resolution | 61,000,000 pixels | 24,200,000 pixels |
| Optical Sensor Size | Full Frame (35.7 x 23.8 mm) | APS-C (23.5 x 15.6 mm) |
| Frame Rate (Max Resolution) | 30 fps | 30 fps |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Dust Reduction (image sensor vibration), Anti-Dust coating | Dust Reduction (image sensor vibration), Anti-Dust coating |
| Image Stabiliser | Optical (5-axis Steady Shot) | Optical (5-axis image sensor shift mechanism) |
| Built-in Optical Image Stabiliser | Yes | Yes |
| Sensors | Digital level metre | Digital level metre |
| PROCESSOR | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Image Processor | BIONZ X | BIONZ X |
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| LENS | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Type | - | Zoom lens - 7.5x zoom - 18 - 135 mm - f/3.5-5.6 E OSS - zoom |
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| Focal Length Equivalent to 35mm Camera | - | 27 - 202.5mm |
| Focus Adjustment | - | Automatic, manual |
| Min Focus Distance | - | 45 cm |
| Max View Angle | - | 76 degree(s) |
| Zoom Adjustment | - | Manual (by ring) |
| Lens Construction | - | 12 groups / 16 elements |
| Filter Size | - | 55 mm |
| Lens Mounting Type | Sony E-mount | Sony E-mount |
| Features | - | ED glass, aspherical lens, linear AF motor |
| FOCUSING | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Auto Focus | TTL contrast and phase detection | TTL contrast and phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | 567 | 425 |
| Auto Focus Features | Predictive Focus Control, Focus Priority in Aperture Drive | Focus Peaking function, Predictive Focus Control |
| AE/AF Control | Zone AF, Real-time Eye AF, Real-time Tracking AF | - |
| Face Detection | Eye Detect AF, face-priority AF function | Eye Detect AF, Face Detection AF/AE, Self Portrait Auto Shutter |
| VIEWFINDER | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Viewfinder Type | Electronic - OLED | Electronic - OLED |
|---|---|---|
| Viewfinder Colour Support | Colour | Colour |
| Viewfinder Diagonal Size | 0.5" | 0.39" |
| Viewfinder Resolution | 5,760,000 pixels | 2,359,296 pixels |
| Optical Viewfinder Field Coverage | 100% | 100% |
| Optical Viewfinder Magnification | 0.78x | 1.07x |
| Optical Viewfinder Dioptric Correction Range | -4 to +3 | -4 to +3 |
| Field of View Crop Factor | - | 1.5 |
| Features | Viewfinder brightness control, colour temperature control | Viewfinder brightness control, colour temperature control |
| EXPOSURE & WHITE BALANCE | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| ISO (Max) | 32000 | 102400 |
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| Native ISO | 100-32000 | 100-32000 |
| Extended ISO (Max) | 102400 | 102400 |
| Extended ISO (Min) | 50 | 50 |
| Light Sensitivity | ISO 50, ISO 102400, ISO auto (100-12800), ISO 100-32000 | ISO 50, ISO 102400, ISO 51200, ISO 100-32000 |
| Exposure Metering | Multi-segment, centre-weighted, spot, average | Multi-segment, centre-weighted, spot, average, highlight-weighted |
| Exposure Metering Zones | 1200 | 1200 |
| Exposure Modes | Bulb, automatic, manual, aperture-priority, shutter-priority | Programme, bulb, automatic, manual, aperture-priority, shutter-priority |
| Bracketing Modes | Dynamic Range Bracketing, white balance bracketing | Dynamic Range Bracketing, Flash Exposure Bracketing, white balance bracketing |
| Shooting Programs | - | Landscape, portrait mode, macro, night portrait, night scene, sports mode, sunset, handheld twilight, anti-motion blur |
| Special Effects | Black & White, Sepia, Neutral, Vivid, sunset, landscape, portrait, clear, deep, light, autumn leaves, Retro, partial colour, Toy camera, Posterisation, High contrast monochrome, Pop Colour, Soft High-key, Night Scene, Standard, Style Box, Posterisation (B/W) | Black & White, Sepia, Neutral, Vivid, sunset, landscape, portrait, clear, deep, light, autumn leaves, Retro, partial colour, Toy camera, Posterisation, High contrast monochrome, Pop Colour, Rich-tone monochrome, Soft High-key, Night Scene, Standard, Style Box, Posterisation (B/W) |
| White Balance | Custom, automatic, presets | Custom, automatic, presets |
| White Balance Presets | Incandescent, cloudy, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (daylight), fluorescent light (warm white), Underwater, 2500K - 9900K, fluorescent light (daylight white) | Incandescent, cloudy, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (daylight), fluorescent light (warm white), Underwater, 2500K - 9900K, fluorescent light (daylight white) |
| Shutter Type | Electronic, mechanical electronically-controlled | Mechanical electronically-controlled |
| Max Shutter Speed | 1/8000 sec | 1/4000 sec |
| Min Shutter Speed | 30 sec | 30 sec |
| Exposure Compensation | ±5 EV range, in 1/2 or 1/3 EV steps | ±5 EV range, in 1/2 or 1/3 EV steps |
| Auto Exposure Bracketing | 3, 5, 9 steps in 1/3, 1/2, 2/3, 1, 2 or 3 EV steps | 3, 5, 9 steps in 1/3, 1/2, 2/3, 1, 2 or 3 EV steps |
| White Balance Bracketing | Yes | Yes |
| X-sync Speed | 1/250sec | 1/160 sec |
| Exposure Range | EV -3-20 (ISO 100) | EV -2-20 (ISO 100) |
| DISPLAY | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Type | 3" LCD display | 2.95" LCD display |
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| Touch Screen | Yes | Yes |
| Display Format | 1,440,000 pixels | 921,600 pixels |
| Display Form Factor | Folding | Tilting |
| Display Features | Display brightness control, Peaking AF display, Touch AF | Display brightness control |
| VIDEOGRAPHY / CAMCORDER | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Digital Video Format | AVCHD, XAVC S | AVCHD, H.264, XAVC S |
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| Image Recording Format | JPEG, RAW, RAW + JPEG | JPEG, RAW, RAW + JPEG |
| Max Video Resolution | 3840 x 2160 | 3840 x 2160 |
| Audio Signal Format | Dolby Digital AC-3 (2 channel), Linear PCM | Dolby Digital AC-3 (2 channel), Linear PCM |
| Microphone Operation Mode | Stereo | Stereo |
| MEMORY | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Memory Card Slot | Dual SD card | Memory Stick PRO Duo card, SD card |
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| Supported Memory Cards | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, SDHC UHS-II Memory Card, SDXC UHS-II Memory Card | SD Memory Card, Memory Stick PRO Duo, SDXC Memory Card, SDHC Memory Card, Memory Stick PRO-HG Duo, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card |
| Memory Card Included | No | No |
| Image Storage | 9504 x 6336 8448 x 6336 9504 x 5344 6240 x 4160 5552 x 4160 6240 x 3512 4752 x 3168 4224 x 3168 4752 x 2672 3120 x 2080 2768 x 2080 3120 x 1752 6336 x 6336 4160 x 4160 3168 x 3168 2080 x 2080 |
6000 x 4000 4240 x 2832 3008 x 2000 6000 x 3376 4240 x 2400 3008 x 1688 4000 x 4000 2832 x 2832 2000 x 2000 |
| Video Capture | AVCHD - 1920 x 1080 i - 60 fps - 24Mbps AVCHD - 1920 x 1080 i - 60 fps - 17Mbps AVCHD - 1920 x 1080 i - 50 fps - 24Mbps AVCHD - 1920 x 1080 i - 50 fps - 17Mbps XAVC S - 3840 x 2160 p - 30 fps - 100Mbps XAVC S - 3840 x 2160 p - 24 fps - 100Mbps XAVC S - 3840 x 2160 p - 30 fps - 60Mbps XAVC S - 3840 x 2160 p - 24 fps - 60Mbps XAVC S - 1920 x 1080 p - 120 fps - 100Mbps XAVC S - 1920 x 1080 p - 120 fps - 60Mbps XAVC S - 1920 x 1080 p - 60 fps - 50Mbps XAVC S - 1920 x 1080 p - 30 fps - 50Mbps XAVC S - 1920 x 1080 p - 24 fps - 50Mbps XAVC S - 1920 x 1080 p - 60 fps - 25Mbps XAVC S - 1920 x 1080 p - 30 fps - 16Mbps XAVC S - 3840 x 2160 p - 25 fps - 100Mbps XAVC S - 3840 x 2160 p - 25 fps - 60Mbps XAVC S - 1920 x 1080 p - 100 fps - 100Mbps XAVC S - 1920 x 1080 p - 100 fps - 60Mbps XAVC S - 1920 x 1080 p - 50 fps - 50Mbps XAVC S - 1920 x 1080 p - 25 fps - 50Mbps XAVC S - 1920 x 1080 p - 50 fps - 25Mbps XAVC S - 1920 x 1080 p - 25 fps - 16Mbps |
XAVC S - 3840 x 2160 p - 30 fps - 100Mbps XAVC S - 3840 x 2160 p - 24 fps - 100Mbps XAVC S - 3840 x 2160 p - 30 fps - 60Mbps XAVC S - 3840 x 2160 p - 24 fps - 60Mbps XAVC S HD - 1920 x 1080 p - 120 fps - 100Mbps XAVC S HD - 1920 x 1080 p - 120 fps - 60Mbps XAVC S HD - 1920 x 1080 p - 60 fps - 50Mbps XAVC S HD - 1920 x 1080 p - 30 fps - 50Mbps XAVC S HD - 1920 x 1080 p - 60 fps - 25Mbps XAVC S HD - 1920 x 1080 p - 30 fps - 16Mbps AVCHD - 1920 x 1080 i - 60 fps - 24Mbps AVCHD - 1920 x 1080 i - 60 fps - 17Mbps XAVC S - 3840 x 2160 p - 25 fps - 100Mbps XAVC S - 3840 x 2160 p - 25 fps - 60Mbps XAVC S HD - 1920 x 1080 p - 100 fps - 100Mbps XAVC S HD - 1920 x 1080 p - 100 fps - 60Mbps XAVC S HD - 1920 x 1080 p - 50 fps - 50Mbps XAVC S HD - 1920 x 1080 p - 25 fps - 50Mbps XAVC S HD - 1920 x 1080 p - 50 fps - 25Mbps XAVC S HD - 1920 x 1080 p - 25 fps - 16Mbps AVCHD - 1920 x 1080 i - 50 fps - 24Mbps AVCHD - 1920 x 1080 i - 50 fps - 17Mbps |
| BATTERY AND CHARGING | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Battery Type | Sony NP-FZ100 Lithium Ion | Sony NP-FZ100 Lithium Ion |
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| Details | Sony NP-FZ100 Li-ion rechargeable battery - 2280 mAh (included) | Sony NP-FZ100 Li-ion rechargeable battery - 2280 mAh (included) |
| Battery Life | Photo shooting - 670 shots (LCD Monitor on) Photo shooting - 530 shots (EVF on) Video recording - 170 minutes (LCD Monitor on) Video recording - 160 minutes (EVF on) |
Photo shooting - 720 shots (EVF on) Photo shooting - 810 shots (LCD Monitor on) Video recording - 2.33 shots (EVF on) Video recording - 2.5 shots (LCD Monitor on) |
| CONNECTIONS | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Interface | HDMI, USB 2.0, USB-C, NFC (Near Field Communication), IEEE 802.11a/b/g/n/ac, Bluetooth 4.1 | HDMI, USB 2.0, IEEE 802.11b/g/n, NFC (Near Field Communication), Bluetooth 4.1 |
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| Connectivity Features | Remote control via mobile devices, remote live view, PC Remote functions via Wi-Fi | Remote control via mobile devices, remote live view |
| Print Standard | DPOF support, Exif Print support, PRINT Image Matching | DPOF support, Exif Print support, PRINT Image Matching |
| Flash Terminal | Hot shoe, PC terminal | Hot shoe |
| Connector Type | USB 2.0 (5 pin Micro-USB Type B) USB 3.2 Gen 1 (USB Type-C) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) Headphones (mini-phone stereo 3.5 mm) |
USB 2.0 (5 pin Micro-USB Type B) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) Remote control Headphones |
| FEATURES | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Self-Timer Delay | 10 sec, 2sec, 5 sec | 10 sec, 2sec, 5 sec |
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| Continuous Shooting Speed | 8 frames per second, 3 frames per second, 10 frames per second, 6 frames per second | 8 frames per second, 3 frames per second, 6 frames per second, 11 frames per second |
| HDR Mode | HDR Movie mode | Auto HDR mode |
| Additional Features | Built-in speaker, sharpness control, camera orientation detection, histogram display, saturation control, contrast control, Dynamic Range Optimizer, USB charging, built-in help guide, x.v.Colour technology, Clear Image Zoom, noise reduction over long exposures, Lens Distortion Correction, high ISO speed noise reduction, silent shooting, S-Log2 gamma setting, Pixel Shift Resolution technology, peripheral shading correction, chromatic aberration correction, anti-flicker, Hybrid Log-Gamma (HLG) recording, S-Log3 gamma setting, PC Remote functions via USB | Built-in speaker, sharpness control, histogram display, saturation control, shadow point display, interval shooting mode, highlight point display, contrast control, Dynamic Range Optimizer, built-in help guide, Dolby Digital Stereo Creator, Chromatic Aberration Compensation (CAC), Multi-Frame Noise Reduction, Intelligent AUTO (iAUTO), Touch Shutter technology, fast motion recording, Clear Image Zoom, noise reduction over long exposures, Lens Distortion Correction, high ISO speed noise reduction, silent shooting, High Dynamic Range (HDR), S-Log2 gamma setting, slow motion recording, peripheral shading correction, Object Tracking, S-Log3 gamma setting |
| OTHERS | Sony Alpha7R IV ILCE-7RM4 | Sony Alpha6600 ILCE-6600M + E 18-135mm OSS |
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| Included Accessories | Eyepiece cover, battery charger, body cap, shoulder strap, shoe cap, cable protector, USB-C cable | Eyepiece cover, lens hood, dust cap, body cap, lens cap, shoulder strap, AC power adaptor, micro-USB cable, hot shoe cap |
|---|---|---|
| Max Operating Temperature | 40 °C | 40 °C |
| Min Operating Temperature | 0 °C | 0 °C |
| Service & Support | Limited warranty - parts and labour - 1 year | - |
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