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Brand
Other names

Yi Action Camera 4K+, Yi 4K Plus

Yi Action Camera 4K, Yi 4K Ambarella Edition

Yi Lite

Yi Discovery

Xiaomi Yi

Release date

2017

2016

2017

2017

2017

2015

What is it

Sports camera

Sports camera

Sports camera

Sports camera

Sports camera

Sports camera

Dimensions

65 x 30 x 42 mm

65 x 30 x 42 mm

71.5 x 29.5 x 42.7 mm

65 x 30 x 42mm

65.3 x 29.4 x 42.3 mm

60.4 x 21.2 x 42 mm

Weight

90 g

96 g

99 g

72 g

66 g

76 g

Body material

Hard plastic, Metal

Hard plastic, Metal

Hard plastic, Metal

Hard plastic, Metal

Hard plastic, Metal

Hard plastic, Metal

Colours

Black

Black

Black

Lime green, Black, Sky blue

Black

White, Blue, Green

Lenses

155° FOV, f2.8

155° FOV, f2.8

145° FOV, f2.8

150° FOV, f2.8

150° FOV, f2.4

155° FOV, f2.8

Focal length

2,66±5%mm

2,73±5%mm

3,2±5%mm

2,8±5%mm

2,27±5%mm

2,73±5%mm

Screen

2,2" / 640 x 360 / 330 PPI

2.19" / 640 x 360 / 330 PPI

2,4" / 960 x 480

2.0" / 640 x 360

2.0" / 640 x 360

Processor

Ambarella H2 / Cortex-A53

Ambarella A9SE Cortex-A9 ARM

Ambarella A12

Hisilicon Hi3556V100

Allwinner v30

Ambarella A7LS

RAM

2GB

2GB

2GB

1Gb + 4GB

2GB

1GB

Image sensor

Sony IMX377 12MP

Sony IMX377 12MP with Exmor R skill.

Sony Exmor R CMOS BSI 16MP

Sony IMX179 16MP

Sony IMX206 16MP

Video modes

4K / 4K ULTRA / 2,7K(16:9) / 2,7K ULTRA / 2,7K(4:3) / 1440P / 1080P / 1080P ULTRA / 960P / 720P / 720P ULTRA / 480P

4K / 4K ULTRA / 4000X3000 / 2,7K(16:9) / 2,7K ULTRA / 2,7K(4:3) / 1440P / 1080P / 1080P ULTRA / 960P / 720P / 720P ULTRA / 480P

4K / 4K ULTRA / 4000X3000 / 2,7K(16:9) / 2,7K ULTRA / 2,7K(4:3) / 1440P / 1080P / 1080P ULTRA / 960P / 720P / 720P ULTRA / 480P

4K / 1440P / 1080P / 720P

4K / 1440P / 1080P / 720P

1080P / 960P / 720P /480P

Video format

H.264 MP4

H.264 MP4

H.264 MP4

H.264 MP4

MP4

H.264 MP4

General functions

Time-lapse / Slow motion / Video + Photo / Loop / Self-timer / Electronic image stabilizer / Auto low light / Lens distortion correction

Time-lapse / Slow motion / Video + Photo / Loop / Self-timer / Electronic image stabilizer / Auto low light / Lens distortion correction

Time-lapse / Slow motion / Delayed exposure / High-speed burst / Electronic image stabilizer

Time-lapse / Slow motion / Video + Photo / Self-timer / Electronic Image Stabilizer

Self-timer / Electronic Image Stabilizer

Slow motion / Electronic image stabilizer

Slow motion

720p 60/120/240fps / Speed 2/4/8

720p 60/120/240fps / Speed 2/4/8

720p 60/120/240fps / Speed 2/4/8

Speed 2/4/8

No

Yes

Photo resolution

12MP / 8MP / 7MP Wide / 7MP Medium / 5MP

12MP / 8MP / 7MP Wide / 7MP Medium / 5MP

8MP

16MP / 10MP

16MP / 8MP

16MP / 8MP

Photo modes

Self-timer / Burst / Interval photo / Shutter

Self-timer / Burst / Interval photo / Shutter

Self-timer / Burst / Interval Shooting

Self-timer / Burst / Time-lapse / Interval shooting

Self-timer / Burst / Interval photo

Timer / Raffle / Photo at intervals

Shutter

Auto / 2s / 5s / 10s / 20s / 30s

Speed 1/4096s to 30s. Automatic mode 2s / 5s / 10s / 20s / 30s

Auto / 2s / 5s / 10s / 20s / 30s

Auto / 2s / 5s / 10s / 20s / 30s

Auto / 2s / 5s / 10s / 20s / 30s

Auto / 2s / 5s / 10s / 20s / 30s

Automatic parameters

White Balance / White Balance Setting / ISO / ISO-Max and ISO-Min for Photo / VCE / Metering Mode / Movie Quality

White Balance / White Balance Setting / ISO / ISO-Max and ISO-Min for Photo / VCE / Metering Mode / Movie Quality

White balance / ISO adjustment

White balance / White balance adjustment / ISO / ISO-Max and ISO- Min for photo

White balance adjustment / ISO

White balance adjustment / ISO

Connectivity

Wi-Fi 802.11 a/b/g/n/ac / Bluetooth 4.0

Broadcom BCM43340 Dual-band 5GHz /2.4GHz, built-in / 30Mbps download speed / BLE 4.0 & 2.0 Dual

Wi-Fi 802.11 a/b/g/n / Bluetooth 4.1

Broadcom 43455, download speed 5 0Mb/s - bluetooth BLE 4.1

Wi-Fi 802.11 a/b/g/n

Wi-Fi 802.11 a/b/g/n / Bluetooth 4

Port types

USB Type-C / Type-C to RCA / Type-C to Microphone / Dual MicrophoneMicro SD hasta 64 GB

USB Type-C / Type-C to RCA / Type-C to Microphone / Dual Microphone

Micro USB

Micro USB

USB 2.0

Micro USB, HDMI

Storage

Micro SD up to 64 GB

MicroSDHC, MicroSDXC 16GB - 64GB storage card

Micro SD up to 64 GB

Micro SD card Class 10 and above; 16GB-64GB FAT32

Micro SD up to 64 GB

Micro SD up to 64 GB

Battery

1200 mAh

1400 mAh

1450 mAh

1200 mAh

900 mAh

1010 mAh

Battery type

Lithium polymer

Lithium polymer

Lithium polymer

Lithium polymer

Lithium polymer

Lithium polymer

Battery duration

73-127 minutes

Water resistance

IP68 up to 50m with submersible casing

Up to 40m (Only with waterproof casing)

IP68 up to 50m with a submersible casing

Up to 40m (Only with the submersible casing)

IP 68 up to 50m with submersible casing

IP 68 up to 50m with submersible casing

Battery life (continuous recording)

110 minutes

180 - 220 minutes

Image sensor

Sony IMX317 8MP

Battery duration (continuous recording)

120 minutes

75-110 minutes

70-100 minutes

Description

In recent years, action cameras have become very popular devices among fans of extreme sports, nature, etc. For this reason, from Xiaomipedia we bring a top of the best cameras that the Chinese manufacturer has or one of its sub-brands.

The first aspect to take into account when working with this type of device is its size. Precisely this type of camera is used because they are very small and handy, they can be carried in any backpack and their weight is very low. The materials are usually plastic or metal, which affects strength and weight. These devices usually also include a case that increases the resistance of the camera, the weights that are provided from Xiaomipedia are without taking this case into account.

The lenses are quite wide in aperture and FOV (Field of View) is one of the most important factors when choosing an action camera. Generally speaking, a shorter focal length gives you a wider field of view, however, the focal length of the lens is not equivalent to FOV. For these cameras, it is around 150º. The focal lengths are somewhat higher than those of the main sensors of smartphone cameras, which translates into a slightly dimmer sensor, with less ability to capture light from outside.

The screen is not a crucial aspect of this type of device, but it is important that it can be viewed outdoors, for which it is convenient to have adjustable brightness. Resolutions range from 320 to 640 pixels, on average, with a diagonal size of slightly more than 2 inches.

Yi's cameras normally mount Sony sensors, which a priori should provide good results, at least a priori. Video modes are a crucial feature when purchasing an action camera, the greater the number of these, the more freedom we will have when it comes to managing the memory card space, and choosing the video quality. Something to keep in mind is the ratio between width and length, this is if the image is 4:3, 16:9, etc. To avoid black stripes when viewing on a monitor, we will have to record in the same format as our screen (the most standard is 16:9). Obviously, if we record with a higher resolution than the maximum that our monitor can support, the videos will be shown with the maximum resolution that the monitor supports.

The image stabilizer is essential for a product with these characteristics. It can be electronic or optical. A physical (optical) system will always work better than electronic stabilization (via software), although electronics can provide good results. With such wide lenses, it is common for the same cameras to incorporate a correction for this "fisheye" effect. They also usually bring different slow-motion modes, differentiated from each other by the number of frames that the video includes for each second of it.

Most of them can be connected to the Yi Action App, available for iOS and Android. The connection between the phones and the cameras takes place via WiFi since the camera can generate a portable WiFi zone to which the phone can be connected, in this way, the camera can be controlled from a certain distance. This function is very useful if we want to take photographs in the middle of nature, animals in their natural habitat, for example.

The connectivity usually includes Bluetooth, WiFi (as we have already seen above), and a Micro UBS or USB Type-C input for charging. If it includes an HDMI or mini HDMI port, we will avoid having to use a computer as an intermediate point when connecting the camera to a television, but it is not essential. In terms of battery, the most important aspect is that of continuous video recording, rather than the battery capacity itself. The IP68 certification should be an essential feature if we are thinking of acquiring a device with these characteristics, and it is necessary to verify if this certification applies without the housing on, or only with it.