57points

Nikon D3100

95points

Sony Alpha a7 III

Nikon D3100
Comparison winner
Sony Alpha a7 III
vs
vs

85 facts in comparison

Nikon D3100 vs Sony Alpha a7 III

Nikon D3100
Sony Alpha a7 III
Nikon D3100
Sony Alpha a7 III
57
points
95
points

Why is Nikon D3100 better than Sony Alpha a7 III?

  • 195g lighter
    455gvs650g
  • Has an optical viewfinder
  • 1.92% less body volume
    880.1cm³vs902.208cm³
  • Has a flash
  • 2.54mm narrower
    124.46mmvs127mm
  • 0.34mm thinner
    73.66mmvs74mm

Why is Sony Alpha a7 III better than Nikon D3100?

  • 1.62x more megapixels (main camera)
    24MPvs14.8MP
  • 2.4x larger sensor
    35.8 x 23.8mmvs23.1 x 15.4mm
  • 682 more focus points
    693vs11
  • 2x higher maximum light sensitivity
    25600 ISOvs12800 ISO
  • 3.33x faster shooting at highest resolution with AF as JPEG format
    10fpsvs3fps
  • 4.06x lower noise at high ISO
    3730ISOvs919ISO
  • 60shots longer battery life
    610shotsvs550shots
  • 2.5x better video recording quality (main camera)
    2160 x 30fpsvs1080 x 24fps

Top specs and features

Design

1.has a flip-out screen
Nikon D3100
Sony Alpha a7 III

Flip-out screens are useful for doing tricky shots.

For example

Canon PowerShot SX70 HS

2.Weather sealed
Nikon D3100
Sony Alpha a7 III

Device is protected with extra seals to prevent failures due to any kind of weather.

3.has an optical viewfinder
Nikon D3100
Sony Alpha a7 III

An optical viewfinder (or OVF) allows the photographer to compose a shot while seeing exactly what the lens sees. There is no time lag and they require no power - as opposed to electronic viewfinders which can drain battery life. They are also better in low light situations.

4. more viewfinder coverage

95%

100%

With 100% coverage you can compose the image correctly when you capture the photo. With less than full coverage you may have to crop your photos afterwards to get them looking perfect.

Best

Leica Q-P

100%

5.Has a built-in focus motor
Nikon D3100
Sony Alpha a7 III

The focus motor moves the lens in order to autofocus. For system cameras, having a focus motor in the camera's body allows you to use a wide range of lenses, including lenses which do not have their own focus motor. For compact cameras, a focus motor is usually built-in.

For example

Canon EOS 200D

6.weight

455g

650g

Best

HTC Re

65.5g

Optics

1.sensor size

23.1 x 15.4mm

35.8 x 23.8mm

The larger the sensor the more light the sensor captures yielding in better image quality.

Best

Polaroid Snap

81.2 x 25.4mm

2.focus points

11

693

The more focus points the more flexibility in picking which part of the scene to focus on. They also give the image sensor a better probability in identifying the right area of the scene to focus on in more automatic modes.

Best

Canon EOS R

5655

3.has AF tracking
Nikon D3100
Sony Alpha a7 III

With AF tracking, once you choose the subject and press the shutter release part way down, as the subject moves, the autofocus will follow it. No more out of focus shots.

4.maximum light sensitivity

12800 ISO

25600 ISO

With a higher light sensitivity (ISO level), the sensor absorbs more light. This can be used to capture moving objects using a fast shutter speed, or to take images in low light without using a flash.

Best

Nikon D7500 + Nikon AF-S DX Nikkor 18-140mm f/3.5-5.6G ED VR

1640000 ISO

5.megapixels

14.8MP

24MP

Best

Panono Camera

108MP

6.has built-in optical image stabilization
Nikon D3100
Sony Alpha a7 III

Optical image stabilization uses gyroscopic sensors to detect the vibrations of the camera. The lens adjusts the optical path accordingly, ensuring that any type of motion blur is corrected before the sensor captures the image.

Videography

1.video recording (main camera)

1080 x 24fps

2160 x 30fps

The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.

Best

Fujifilm X-T3

2160 x 60fps

2.Has phase detection autofocus for videos
Nikon D3100
Sony Alpha a7 III

A phase detection autofocus system is faster than a contrast detection autofocus system. Even when recording scenes with a lot of fast movements, the videos are sharp and clear.

3.Has timelapse function
Nikon D3100
Sony Alpha a7 III

A timelapse shows a long passage of time sped up. A series of photographs taken from the same position over a long period is joined together to create a short video. It is great way to capture things like the setting sun, or clouds moving across the sky.

For example

Leica Q-P

4.has continuous autofocus when recording movies
Nikon D3100
Sony Alpha a7 III

When recording movies they stay focussed and sharp.

5.supports AVCHD format
Nikon D3100
Sony Alpha a7 III

AVCHD (Advanced Video Coding High Definition) is a file-based format for the digital recording and playback of high-definition video. It's a standard popular among professional cameras and camcorders.

6.has a 24p cinema mode
Nikon D3100
Sony Alpha a7 III

24p is a video format (24 frames per second) traditionally used in cinema. Nowadays, it is used to create film-like motion characteristics.

Audio

1.has a stereo microphone
Nikon D3100
Sony Alpha a7 III

A stereo microphone allows to record audio files or movies in stereo without an external microphone.

2.has a microphone in
Nikon D3100
Sony Alpha a7 III

A microphone port allows connecting external high-end or specialized microphones.

3.number of microphones

1

2

More microphones result in better sound quality and enable the device to filter out background noise.

Best

Canon EOS 200D

2

4.has a socket for a 3.5 mm audio jack
Nikon D3100
Sony Alpha a7 III

With a standard mini jack socket, you can use the device with most headphones.

5.has stereo speakers
Nikon D3100
Sony Alpha a7 III

Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.

For example

Panasonic Lumix DC-TS7

6.has a zoom microphone
Nikon D3100
Sony Alpha a7 III

Zoom microphones record very high quality audio, and enable you to record sound from a distance. This can be useful for recording meetings, lectures and presentations.

For example

Panasonic Lumix DC-LX100 II

Battery

1. longer battery life

550shots

610shots

CIPA is an independent, standard measurement that determines how many shots a camera can take before the battery dies.

Best

Nikon D3x

4400shots

2.battery power

1000mAh

2280mAh

Best

Samsung Galaxy NX Mirrorless + 18-55mm f/3.5-5.6

4360mAh

3.has a removable battery
Nikon D3100
Sony Alpha a7 III

The battery is removable and can be replaced by the user if broken.

4.has a rechargeable battery
Nikon D3100
Sony Alpha a7 III

The battery can be recharged and used over again.

5.has a battery level indicator
Nikon D3100
Sony Alpha a7 III

An indicator shows you when the device has low battery.

6.wireless charging
Nikon D3100
Sony Alpha a7 III

The manufacturer offers a branded wireless charging kit. To charge the device, you simply put it down on its charging base.

For example

Canon PowerShot SX740 HS

Features

1.image quality

67

96

A device's overall image quality score considers: color depth, dynamic range and low light performance. Source: DxOMark.

Best

Nikon D850

100

2.noise

919ISO

3730ISO

The maximum ISO at which the device still captures excellent quality images. Source: DxOMark.

Best

Sony Alpha a7 III

3730ISO

3.color depth

22.5bits

25bits

The better a device's color depth the more color nuances it can distinguish. Source: DxOMark.

Best

HP Photosmart R927

42bits

4.dynamic range

11.3Evs

14.7Evs

The better the dynamic range the system captures a wider number of values from dark to light leading to more details in low and highlights. Source: DxOMark.

Best

Nikon D810A

14.8Evs

5.Has WiFi
Nikon D3100
Sony Alpha a7 III

The device can connect to WiFi.

6.has an external memory slot
Nikon D3100
Sony Alpha a7 III

The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.

Videos

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