Sony a7 III vs Sony a550

This is a full comparison between the cameras Sony a7 III and Sony a550. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Sony.

Type of camera

Sony a7 III is a Mirrorless camera while Sony a550 is a DSLR camera. More information about their differences will come soon.

Sensors / crop factor

These cameras have different sensors. Sony a7 III has a "Sony Full Frame"-sensor while Sony a550 has a "Sony APS-C"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

** Experienced focal length when using a lens such as a common "50mm f/1.8"

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Sony)

Resolution

Sony a7 III has a 24 MP (Megapixels) resolution while Sony a550 has 14 MP. If we break down this in more detail this is the data behind the numbers:

Sony a7 III has a 71 % larger resolution than Sony a550. This could give you more details in the picture but also a possibility to crop more in the pictures, afterward while editing the pictures, if needed that is.

ISO range

Sony a7 III has a larger ISO-range than Sony a550. Sony a7 III has an ISO range that stretches from 100 to 51200 while Sony a550 has 200 to 12800.

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that support autofocus, do not have an autofocus motor of their own but this won't cause any problems with these two cameras.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a7 III
Lens compatibility chart for Sony a550

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7 III can shoot up to 10 pictures per seconds and Sony a550 can shoot up to 7 pictures per seconds.

Ability to record movies

It is becoming more and more popular to record movies with digital cameras.

When comparing these two cameras there is only one of them that can shoot movies and that is Sony a7 III. Unfortunately Sony a550 does not support recording movies and movie clips.

Weight

The weight of the camera can be an extremely important factor, especially if the camera is about to be used, or carried around, for several hours at a time.

Sony a7 III weighs 650 gr (equal to 1.43 lb) which is 3% heavier than Sony a550 and its 632 gr (or 1.39 lb).

Sony a7 III vs Sony a550 Specs

Below you will find the complete and detailed technical specs for both Sony a7 III and Sony a550, next to each other. Each category of data is a link to an article covering the subject, giving you a deeper understanding so you can better understand the strengths and weaknesses of the two camera models.

Product	Sony a7 III	Sony a550
Name	Sony a7 III	Sony a550
Manufacturer	Sony	Sony
Release Date and Price	Sony a7 III	Sony a550
Release Year	2018	2009
Release Date	2018-02-27	2009-08-27
MSRP	1999 USD	949 USD
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Camera Type	Sony a7 III	Sony a550
Camera Type	Mirrorless	DSLR
Sensor	Sony a7 III	Sony a550
Sensor Size	Full Frame (approx 36 x 24 mm)	APS-C (approx 23.5 x 15.6 mm)
Sensor Type	BSI-CMOS	CMOS
Resolution	6000 x 4000 pixels	4592 x 3056 pixels
Megapixels	24 MP	14 MP
Image Processor	Bionz X	Bionz
Image	Sony a7 III	Sony a550
ISO Range	100 - 51200	200 - 12800
White Balance Presets	11	6
Custom White Balance	Yes	Yes
Image Stabilization	Yes (Sensor-Shift)	Yes (Sensor-Shift)
Image Stabilization CIPA Rating	5 stops	0 stops
Uncompressed format	RAW	RAW
Optics & Focus	Sony a7 III	Sony a550
Autofocus Motor	Yes	Yes
Autofocus	Contract Detect (sensor) Phase Detect Multi Area Center Selective Single Point Tracking Single Continuous Touch Face Detection LiveView	Phase Detect Multi Area Selective Single Point Single Continuous Face Detection LiveView
Focus Points	693	9
Lens Mount	Sony E See Compatible Lenses	Sony A See Compatible Lenses
Focal Length Multiplier	Full frame No multiplier Example: 24 mm remains 24 mm 50 mm remains 50 mm 100 mm remains 100 mm 200 mm remains 200 mm	APS-C Sensor (1.5x) 1.5x multiplier Example: 24 mm becomes 36 mm 50 mm becomes 75 mm 100 mm becomes 150 mm 200 mm becomes 300 mm
Screen & Viewfinder	Sony a7 III	Sony a550
Articulated LCD	Tilting	Tilting
Screen size	3”	3”
Screen dots	921600	921600
Touch screen	Yes	No
Screen type	N/A	N/A
Live view	Yes	Yes
Viewfinder Type	Electronic	Optical (pentamirror)
Viewfinder Coverage	100%	95%
Viewfinder Magnification	0.78x	0.8× (0.53× 35mm equiv.)
Viewfinder Resolution	2359296	N/A
Photography features	Sony a7 III	Sony a550
Frames per second	10 fps	7 fps
Minimum Shutter Speed	30 seconds	30 seconds
Maximum Shutter Speed	1/8000 seconds	1/4000 seconds
Built-in Flash	No	Yes
Built-in Flash Range	N/A	12 meters
External Flash	Yes	Yes
Self-Timer	Yes	Yes
Time-lapse	No	No
Metering modes	Multi Center Weighted Highlight Weighted Spot Average	Multi Center Weighted Spot
Exposure Compensation	+/- 5 (at 1/3 EV, 1/2 EV steps)	+/- 2 (at 1/3 EV steps)
Videography features	Sony a7 III	Sony a550
Video recording	Yes	No
Video format	MPEG4 H.264 XAVC-S AVCHD	N/A
Video resolution	1920 x 1080 3840 x 2160	N/A
Built-in Microphone	Yes	No
Built-in Speakers	Yes	No
Storage	Sony a7 III	Sony a550
Memory Card	Memory Stick Pro Duo SD/SDHC	Memory Stick Pro Duo SD/SDHC
Connectivity	Sony a7 III	Sony a550
HDMI Output	Yes	Yes
Microphone Port	Yes	No
Headphone Port	Yes	No
Wireless	Yes Built-in (with NFC and wireless control via PlayMemories Mobile app)	No
Remote Control	Wired	Yes (Wired or Wireless (Optional))
GPS	No	No
Body & Dimensions	Sony a7 III	Sony a550
Enviromentally sealed	Yes	No
Battery	Battery Pack	Battery Pack
Battery Details	NP-FZ100 lithium-ion battery and charger	Lithium-Ion NP-FM500H rechargeable battery & charger
Battery Life (CIPA)	710 shots	480 shots
Width	127 mm	137 mm
Height	96 mm	104 mm
Depth	74 mm	84 mm
Weight	650 gram	632 gram