If you are looking for the lightest possible full-frame mirrorless camera, you are in the right place (To keep the list as current as possible, I have only included the cameras that were released in 2020 or later). Sigma fp L is the lightest camera on the list with a weight of only 427 g / 0.94 lbs, followed by the Canon R8 and the Sony A7c. At the end of the post, you will also find a specs and feature comparison table for these 10 cameras.
TOP 10 LIGHTEST FULL-FRAME MIRRORLESS CAMERAS
Comparison of Top 10 Lightest Full-frame Mirrorless Cameras
| FEATURE and SPECS COMPARISON | |  |  |  |  |  |  |  |  |  |  |
| Model | Sigma fp L | Canon EOS R8 | Sony Alpha A7c | Leica M11 | Sony Alpha A7 IV | Nikon Z5 | Canon EOS R6 | Canon EOS R6 Mark II | Sony Alpha A7S III | Nikon Z6 Mark II |
| Sensor Resolution | 61.0 MP | 24.0 MP | 24.0 MP | 60.0 MP | 33.0 MP | 24.0 MP | 20.0 MP | 24.0 MP | 12.0 MP | 25.0 MP |
| Announced Date | 2021-03-25 | 2023-02-08 | 2020-09-14 | 2022-01-13 | 2021-10-21 | 2020-07-20 | 2020-07-09 | 2022-11-02 | 2020-07-21 | 2020-10-14 |
| Camera Type | Advanced Mirrorless | Advanced Mirrorless | Advanced Mirrorless | Pro Mirrorless | Pro Mirrorless | Advanced Mirrorless | Pro Mirrorless | Pro Mirrorless | Pro Mirrorless | Pro Mirrorless |
| Sensor Type | BSI-CMOS | CMOS | BSI-CMOS | BSI-CMOS | BSI-CMOS | CMOS | CMOS | CMOS | BSI-CMOS | BSI-CMOS |
| Sensor Size | Full frame | Full frame | Full frame | Full frame | Full frame | Full frame | Full frame | Full frame | Full frame | Full frame |
| Sensor Sensitivity | ISO 100 - 25600( expands to 6 - 102400) | ISO 100 - 102400( expands to 50 - 204800) | ISO 100 - 51200( expands to 50 - 204800) | ISO 64 - 50000 | ISO 100 - 51200( expands to 50 - 204800) | ISO 100 - 51200( expands to 50 - 102400) | ISO 100 - 102400( expands to 50 - 204800) | ISO 100 - 102400( expands to 50 - 204800) | ISO 80 - 102400( expands to 50 - 409600) | ISO 100 - 51200( expands to 50 - 204800) |
| Lens Mount | Leica L | Canon RF | Sony E | Leica M | Sony E | Nikon Z | Canon RF | Canon RF | Sony E | Nikon Z |
| Image Stabil. | No | Digital only | Sensor-shift ( up to 5.0 stops) | No | Sensor-shift ( up to 5.5 stops) | Sensor-shift ( up to 5.0 stops) | Sensor-shift ( up to 8.0 stops) | Sensor-shift ( up to 8.0 stops) | Sensor-shift ( up to 5.5 stops) | Sensor-shift |
| Eye Tracking Focus | | | | | | | | | | |
| Weight | 427g | 461g | 509g | 530g | 659g | 675g | 680g | 680g | 699g | 705g |
| Dimensions | 113 x 70 x 45mm | 133 x 86 x 70mm | 124 x 71 x 60mm | 139 x 39 x 80mm | 129 x 97 x 81mm | 134 x 101 x 70mm | 138 x 98 x 88mm | 138 x 98 x 88mm | 129 x 97 x 81mm | 134 x 101 x 70mm |
| Weather Sealing | | | | | | | | | | |
| Animal Eye Tracking | | | | | | | | | | |
| Focus Stacking | | | | | | | | | | |
| Focus Bracket | | | | | | | | | | |
| Minimum Shutter | 30 sec | 30 sec | 30 sec | 3600 sec | 30 sec | 30 sec | 30 sec | 30 sec | 30 sec | 30 sec |
| Maximum Shutter | 1/8000sec | 1/4000sec | 1/4000sec | 1/4000sec | 1/8000sec | 1/8000sec | 1/8000sec | 1/8000sec | 1/8000sec | 1/8000sec |
| Continuous Drive | 10.0fps | 6.0fps | 10.0fps | 4.5fps | 10.0fps | 4.5fps | 12.0fps | 12.0fps | 10.0fps | 14.0fps |
| Max Video Reso | 3840 x 2160 | 3840 x 2160 | 3840 x 2160 | None | 3840 x 2160 | 3840 x 2160 | 3840 x 2160 | 3840 x 2160 | 3840 x 2160 | 3840 x 2160 |
| Battery Life | 240 | 290 | 740 | 700 | 600 | 470 | 360 | 580 | 600 | 410 |
| Battery Model | BP-51 | LP-E17 | NP-FZ100 | BC-SCL7 | NP-FZ100 | EN-EL15c | LP-E6NH | LP-E6NH | NP-FZ100 | EN-EL15c |
| RAW Video | | | | | | | | | | |
| Webcam | | | | | | | | | | |
| Anti Flicker | | | | | | | | | | |
| Microphone Port | | | | | | | | | | |
| Headphone Port | | | | | | | | | | |
| Wifi | | | | | | | | | | |
| Weather Sealing | | | | | | | | | | |
| Timelapse | | | | | | | | | | |
| Screen Type | Fixed | Fully articulated | Fully articulated | Fixed | Fully articulated | Tilting | Fully articulated | Fully articulated | Fully articulated | Tilting |
| Top LCD | | | | | | | | | | |
| LCD Size | 3.20" | 3.00" | 3.00" | 3.00" | 3.00" | 3.20" | 3.00" | 3.00" | 3.00" | 3.20" |
| Screen dots | 2100000 | 1620000 | 921600 | 2332800 | 1440000 | 1040000 | 1620000 | 1620000 | 1228800 | 2100000 |
| Touch Screen | | | | | | | | | | |
| Viewfinder | | | | | | | | | | |
| Viewfinder Type | Electronic (optional) | Electronic | Electronic | Optical (rangefinder) | Electronic | Electronic | Electronic | Electronic | Electronic | Electronic |
| Viewfinder Coverage | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% |
| Viewfinder Magnification | 0.83x | 0.76x | 0.59x | 0.73x | 0.78x | 0.8x | 0.76x | 0.76x | 0.9x | 0.8x |
| NFC | | | | | | | | | | |
| Selfie Friendly Screen | | | | | | | | | | |
| AF Joystick | | | | | | | | | | |
| Bluetooth | | | | | | | | | | |
| Full-size HDMI Port | | | | | | | | | | |
| Gyro data Stabilization | | | | | | | | | | |
| Vehicle Tracking | | | | | | | | | | |
| Price | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo | Amazon, B&H Photo |