Sony A7R Memory Card Compatibility

By Nathaniel Stephan
Last Updated: October 16, 2019
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Sony SD Memory Card Compatibility

The Sony A7R is able to use two types of memory cards. Sony XC-HG Duo, PRO-HG Duo, and PRO Duo are compatible with in addition to SDXC, SDHC, and SD memory cards.

There is a single memory card slot in the camera. You will have to make a decision between an SD or PRO Duo memory card.

PRO Duo memory cards are a proprietary format that is owned by Sony. Due to that, SD cards are quite a bit cheaper and can provide greater performance than PRO Duo cards.

Pressed for time? My advice is this SD memory card with the A7R:

SanDisk Extreme Pro UHS-I SDHC Memory Card

SanDisk Extreme Pro 32GB SDHC Memory Card

Excellent price to performance ratio. Read/write speeds are fast enough to use in a camera upgrade.

Best SD Cards

SanDisk, Lexar, and PNY are brands that make the best SD cards. The best SD cards I have used have been the SanDisk Extreme Pro memory cards.

That does not mean you need to purchase a card from SanDisk for your Sony ILCE-7R. Just make sure the name sounds impressive. That will mean you get fast read/write rates, water resistance, and other features.

I have not run into problems with Lexar Professional or PNY Elite Performance cards.

When I have encountered problems with cards has been when I have used inexpensive no-name brands. Not having a brand name increases the possibility of card errors or data corruption.

If you want to spend less money, don't buy a cheap card. You will avoid problems by purchasing a professional-quality card with a reduced capacity.

Recommended SD Cards

SanDisk Extreme Pro UHS-I SDHC Memory Card

SanDisk Extreme Pro 32GB SDHC Memory Card

  • Best value for the money.
  • Capacities from 16 GB to 128 GB.
  • Transfer speeds up to 80 MB/s.
  • Class 10.
  • UHS-I
Lexar 633x 23GB UHS-I SDHC Memory Card

Lexar Professional 633X 32GB SDHC UHS-I Card

  • High speed card.
  • Capacities from 16 GB to 1 TB.
  • Transfer speeds up to 95 MB/s.
  • Class 10.
  • UHS-I/UHS-III.
PNY Flash Memory Card Elite Performance 32GB SDHC UHS-I

PNY Elite Performance 32GB SDHC Card

  • High quality card.
  • Transfer speeds up to 95 MB/s.
  • Class 10.
  • UHS-I.

Sony A7R SD Card Compatibility

SDXC, SDHC, and SD memory cards can be used with the Sony A7R. To get the most performance from the camera, use a SD card.

The most recent SDUC cards will not be useable in the A7R.

There are four different types of Secure Digital (SD) memory cards. New memory specs add more features that provide for greater memory capacity as well as noticeably increased data transfer rates.

  • Secure Digital (SD) - 128MB to 2GB.
  • Secure Digital High Capacity (SDHC) - 4GB to 32GB.
  • Secure Digital eXtended Capacity (SDXC) - 64GB to 2TB.
  • Secure Digital Ultra Capacity (SDUC) - 4TB to 128TB.

SD Card Speed

Speed ratings of an SD card is based on the sequential read and write speeds. The transfer speed of an SD memory card is essential for continuous shooting and video.

Slows cards can cut down the number of continuous images the Sony A7R can capture. This is because the camera's buffer is not able to write to the SD card fast enough.

When shooting video, a slow SD card can cause a sudden end to the recording. The video file may also end up being corrupted. If you intend to shoot video, it is crucial the SD card you use meets the requirements of the camera.

Card read speed is important for transferring files to a computer or laptop. If you are filling up cards with images or video, a card with a fast read speed will reduce the transfer time.

Speed Class Rating

Example of where to find SD Card Speed Class
10 inside of a C showing that the SD card is Class 10.

The Sony A7R requires no less than a Class 4 SD card.

A memory card gets a Class rating based on the sustained continuous transfer rate of the memory card. Class 10 is the best rating, even though memory cards are available that are a good amount faster.

Here you can see all of the Class ratings and their corresponding minimum read/write speeds:

  • Class 2 - 2MB/s
  • Class 4 - 4MB/s
  • Class 6 - 6MB/s
  • Class 8 - 8MB/s
  • Class 10 - 10MB/s or faster

Virtually any SD card worth ordering for the Sony A7R will be a Class 10 card. In the time since the camera was introduced, SD cards have gotten much faster.

Ultra High Speed (UHS)

Example of an SD memory card with a UHS-I rating.
This card has a UHS-I rating. UHS-II and UHS-III cards will have II or III, respectively.

The Ultra High Speed (UHS) bus comes in SDUC, SDXC, and SDHC cards. The UHS bus makes it possible for increased file transfer rates.

There are 3 different specs. They are UHS-I, UHS-II, and UHS-III.

To find out the UHS rating of an SD memory card, look at the front of the card. A Roman numeral I, II, or III on the front of the SD memory card, that will be the rating of the SD card.

  • UHS-I - Maximum transfer rate of 104 MB/s
  • UHS-II - Maximum transfer rate of 312 MB/s
  • UHS-III - Maximum transfer rate of 624 MB/s

Sony A7R PRO Duo Card Compatibility

The Sony A7R can use one PRO-HG Duo or PRO Duo memory cards. What PRO-HG signifies is that the memory card has a minimum read speed of 50mb/s and a 15mb/s minimum write speed.

PRO Duo cards are generally double the price of an SD memory card. I would not recommend purchasing a PRO Duo card for use in a A7R on account of the increase in price.

Image Capacity

Sony SD Memory Card Contacts

Below is an approximate estimation of how many large JPEG images you can expect to store on each size of SD card.

  • 4GB - 1,160 images
  • 8GB - 2,320 images
  • 16GB - 4,640 images
  • 32GB - 9,280 images

Related Cameras

That goes over all of the critical technical specs you need to learn about PRO Duo and SD cards. The SanDisk Extreme Pro 32GB is the best Sony ILCE-7R memory card.

Here are a few more cameras that use similar memory cards as the Sony A7R:

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