Sony a7R IIIA vs Sony a77 II

This is a full comparison between the cameras Sony a7R IIIA and Sony a77 II. We compare them by looking at the categories you see below.

Manufacturing

These cameras are both manufactured by Sony.

Sony a7R IIIA were released 2021 and Sony a77 II was released 2014. That is a 7 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera Released
Sony a7R IIIA 2021
Sony a77 II 2014

Type of camera

Sensors / crop factor

These cameras have different sensors. Sony a7R IIIA has a "Sony Full Frame"-sensor while Sony a77 II 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.

Camera Focal length, 50mm f/1.8 **
Sony a7R IIIA 50 mm
Full-frame sensor
No crop factor/focal length multiplier
Sony a77 II 75 mm
Sony APS-C sensor
Crop factor/focal length multiplier by * 1.5

** 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 a7R IIIA has a 42 MP (Megapixels) resolution while Sony a77 II has 24 MP. If we break down this in more detail this is the data behind the numbers:

Camera Megapixels
Sony a7R IIIA 42 MP
42177408 pixels
7952 x 5304
Sony a77 II 24 MP
24000000 pixels
6000 x 4000

Sony a7R IIIA has a 76 % larger resolution than Sony a77 II. 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 a77 II has a larger ISO-range than Sony a7R IIIA. Sony a77 II has an ISO range that stretches from 100 to 51200 while Sony a7R IIIA has 100 to 32000.

Camera ISO Range
Sony a7R IIIA 100-32000
Sony a77 II 100-51200

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 a7R IIIA
Lens compatibility chart for Sony a77 II

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a7R IIIA can shoot up to 10 pictures per seconds and Sony a77 II can shoot up to 12 pictures per seconds.

Camera FPS (Frames per second)
Sony a7R IIIA 10
Sony a77 II 12

Ability to record movies

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

In this case, both Sony a7R IIIA and Sony a77 II can shoot movies.

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 a7R IIIA weighs 657 gr (equal to 1.45 lb) which is 2% heavier than Sony a77 II and its 647 gr (or 1.43 lb).

Camera Weight
Sony a7R IIIA 657 gr
1.45 lb
Sony a77 II 647 gr
1.43 lb

Sony a7R IIIA vs Sony a77 II Specs

Below you will find the complete and detailed technical specs for both Sony a7R IIIA and Sony a77 II, 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 a7R IIIA
Sony a77 II
Name Sony a7R IIIA Sony a77 II
Manufacturer Sony Sony
Release Date and Price
Sony a7R IIIA
Sony a77 II
Release Year 2021 2014
Release Date 2021-04-07 2014-05-01
MSRP 3199 USD 1199 USD
Buy it today
Camera Type
Sony a7R IIIA
Sony a77 II
Camera Type Mirrorless SLT
Sensor
Sony a7R IIIA
Sony a77 II
Sensor Size Full Frame (approx 36 x 24 mm) APS-C (approx 23.5 x 15.6 mm)
Sensor Type BSI-CMOS CMOS
Resolution 7952 x 5304 pixels 6000 x 4000 pixels
Megapixels 42 MP 24 MP
Image Processor BIONZ X Bionz X
Image
Sony a7R IIIA
Sony a77 II
ISO Range 100 - 32000 100 - 51200
White Balance Presets 10 9
Custom White Balance Yes Yes
Image Stabilization Yes
(Sensor-Shift (5-axis))
Yes
(Sensor-Shift)
Image Stabilization CIPA Rating 5.5 stops 0 stops
Uncompressed format RAW RAW
Optics & Focus
Sony a7R IIIA
Sony a77 II
Autofocus Motor Yes Yes
Autofocus Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Touch
Face Detection
LiveView
Contract Detect (sensor)
Phase Detect
Multi Area
Center
Selective Single Point
Tracking
Single
Continuous
Face Detection
LiveView
Focus Points 399 79
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 a7R IIIA
Sony a77 II
Articulated LCD Tilting Fully articulated
Screen size 3” 3”
Screen dots 2360000 1229000
Touch screen Yes No
Screen type TFT LCD WhiteMagic TFT
Live view Yes Yes
Viewfinder Type Electronic Electronic
Viewfinder Coverage 100% 100%
Viewfinder Magnification 0.78x 1.09× (0.73× 35mm equiv.)
Viewfinder Resolution 3686400 N/A
Photography features
Sony a7R IIIA
Sony a77 II
Frames per second 10 fps 12 fps
Minimum Shutter Speed 30 seconds 30 seconds
Maximum Shutter Speed 1/8000 seconds 1/8000 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
Spot
Multi
Center Weighted
Spot
Exposure Compensation +/- 5 (at 1/3 EV, 1/2 EV steps) +/- 5 (at 1/3 EV, 1/2 EV steps)
Videography features
Sony a7R IIIA
Sony a77 II
Video recording Yes Yes
Video format MPEG4
XAVC-S
AVCHD
MPEG4
AVCHD
Video resolution 1920 x 1080
3840 x 2160
1440 x 1080
1920 x 1080
Built-in Microphone Yes Yes
Built-in Speakers Yes Yes
Storage
Sony a7R IIIA
Sony a77 II
Memory Card SD/SDHC
Memory Stick Pro Duo
SD/SDHC
Connectivity
Sony a7R IIIA
Sony a77 II
HDMI Output Yes Yes
Microphone Port Yes Yes
Headphone Port Yes No
Wireless Yes
Built-in (802.11b/g/n + NFC + Bluetooth)
Yes
Built-in (802.11b/g/n with NFC)
Remote Control Yes (wired, wireless, smartphone) Yes (wired, wireless, or smartphone)
GPS No No
Body & Dimensions
Sony a7R IIIA
Sony a77 II
Enviromentally sealed Yes Yes
Battery Battery Pack Battery Pack
Battery Details NP-FZ100 lithium-ion battery and charger
NP-FM500H lithium-ion battery and charger
Battery Life (CIPA) 650 shots 480 shots
Width 127 mm 143 mm
Height 96 mm 104 mm
Depth 74 mm 81 mm
Weight 657 gram 647 gram