Best Sony A55 Memory Card

By Nathaniel Stephan
Last Updated: October 13, 2019
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Best Sony SLT-A55 Memory Card

Two types of memory cards will work with the Sony A55. Sony PRO-HG Duo and PRO Duo will work with in addition to SDXC, SDHC, and SD memory cards.

Only one memory card can be used in the camera at the same time. You will need to choose between a PRO Duo or SD memory card.

Sony is the sole owner of the PRO Duo format. SD cards have had a wider adoption that PRO Duo cards because SD memory cards are quite a bit faster plus cheaper.

Pressed for time? My advice is this SD memory card combined with the A55:

SanDisk Extreme Pro UHS-I SDHC Memory Card

SanDisk Extreme Pro 32GB SDHC Memory Card

Performance to price ratio is exceptional. Read and write speeds are more than fast enough to use in a camera upgrade.

Want a new lens? Look at the 6 Best Sony A55 Lenses.

Best SD Cards

SanDisk, Lexar, and PNY are manufacturers that make high-quality Memory cards. The best SD cards I have owned have been SanDisk Extreme Pro SD cards.

You do not need to purchase a card made by SanDisk for your Sony SLT-A55. Look for memory cards with cool names. That will mean you get fast read/write rates, water resistance, and other professional features.

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

When I have experienced problems with cards has been when low priced no-name brands were used. A low-cost card increases the chance of card errors or data corruption.

If you would like to spend less money, don't buy a generic card. You will avoid problems by purchasing a professional-quality card with a reduced storage 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 A55 SD Card Compatibility

SDXC, SDHC, and SD cards can be used in the Sony A55. Use an SD memory card to get the optimal overall performance out of the A55.

The latest SDUC memory cards are not supported by the A55.

Currently, there are four different types of SD (Secure Digital) memory cards. Newer memory specifications increase tech that allows for greater memory capacity as well as much faster data transfer speeds.

  • 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 memory card is dependant on the sequential write and read speeds. The write speed of a SD card is very important for video in addition to continuous shooting.

Slows memory cards can decrease the number of continuous photos the Sony A55 can take. This is because the camera's buffer is not able to write data to the memory card quickly enough.

When recording video, a slow memory card can cause recording to end. The video file could also end up being corrupted. If you are going to capture video, it is critical the memory card you use meets the minimum requirements of the camera.

Card read speed is nice to have for transferring files to a computer or laptop. If you have cards that are full, a memory card with a fast read speed will cut down on the amount of time it takes the transfer to finish.

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 A55 requires no less than a Class 4 SD card.

A memory card gets a Class rating based on the continuous transfer rate of the memory card. Class 10 is the maximum rating, even though SD cards are manufactured that have an improved read speed.

Here you can see all of Classes and the applicable lowest 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 memory card worth choosing for the Sony A55 will be a Class 10 memory card. In the time period since the camera was made, Cards have gotten a good deal 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 is found in SDUC, SDXC, and SDHC cards. The UHS bus memory cards to have increased write speeds.

Three separate versions exist. They are UHS-I, UHS-II, and UHS-III.

Look at the front of the SD card to find out the UHS rating of an SD card. If the memory card has UHS, a Roman numeral I, II, or III can be found on the front of the SD memory 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 A55 PRO Duo Card Compatibility

The Sony A55 is able to use a single PRO-HG Duo or PRO Duo 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.

You'll need to pay more to buy a Sony PRO Duo card than a comparable SD card. I would not recommend purchasing a PRO Duo memory card for your A55 as a result of the increase in expense.

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

There is nothing more you need to learn about SD and PRO Duo cards. The SanDisk Extreme Pro 32GB is the best Sony SLT-A55 memory card.

Here are a few more cameras that use similar memory cards as the Sony A55:

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