Pentax K-70 Memory Card Compatibility

By Nathaniel Stephan
Last Updated: September 30, 2019
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Pentax SD Memory Card Compatibility

The Pentax K-70 is able to use SDXC, SDHC, and SD memory cards. Burst shooting and video need SD memory cards with high write speeds to the card.

The performance of your camera can be reduced by using the wrong memory card.

If you are in a rush, here's the best SD card you can buy for the Pentax K-70:

SanDisk Extreme Pro 128GB UHS-I SD Card

SanDisk Extreme Pro 128GB SD Card

  • Best value for the money.
  • Capacities from 32 GB to 2TB.
  • Transfer speeds up to 170 MB/s.
  • Class 10 & UHS-I
  • Temperature Proof, Water Proof, Shock Proof, and X-ray Proof.

Best SD Cards

Since the launch of Pentax K-70, the price of SD cards has dropped.

Seeing as to how low the cost is, it doesn't make financial sense to purchase anything besides a professional-level memory card.

SanDisk Extreme Pro, Lexar Professional, and PNY Elite Performance cards are great. I have under no circumstances had unusable data or a card physically fail with those cards.

All the trouble I have experienced has been because of cheap unbranded cards. Seeking to save around a dollar is not worthwhile if your K-70 will not operate correctly.

If you want to reduce the cost, grab a lower storage capacity SD card from a high-quality supplier. By doing this, you'll know your shots are secure on the card.

Recommended SD Cards

SanDisk Extreme Pro 128GB UHS-I SD Card

SanDisk Extreme Pro 128GB SD Card

  • Best value for the money.
  • Capacities from 32 GB to 2TB.
  • Transfer speeds up to 170 MB/s.
  • Class 10 & UHS-I
  • Temperature Proof, Water Proof, Shock Proof, and X-ray Proof.
PNY Elite Performance SDXC 128GB Memory Card

PNY Elite Performance 128GB SDXC Card

  • Lower priced card.
  • Transfer speeds up to 95 MB/s.
  • Class 10 & UHS-I.
  • Magnet Proof, Shock Proof, Temperature Proof, Waterproof.
Lexar Professional 1066X 128GB SD UHS-I Memory Card

Lexar Professional 1066x 128GB SDXC UHS-I Card

  • Lexar Professional Silver Card.
  • Transfer speeds up to 160 MB/s.
  • Class 10 & UHS-I.
  • Includes Lexar Recovery Tool Software.
  • Designed for durability in harsh conditions.

Pentax K-70 SD Card Compatibility

You are limited to using SDXC, SDHC, and SD cards with the Pentax K-70. For best performance, be certain that your camera has the most recent firmware.

The newest memory cards, SDUC (Secure Digital Ultra Capacity), will not be usable in the K-70.

You need to know of the 4 kinds of Secure Digital (SD) memory cards that there are. You can tell them apart depending on their capacity.

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

Image Capacity

Pentax SD Memory Card Contacts

Here's a quick approximation of just how many max-quality JPEGs shots you can expect to be saved on an SD memory card:

  • 16GB - 4,640 images
  • 32GB - 9,280 images
  • 64GB - 18,560
  • 128GB - 37,120

Speed, Class, & UHS Ratings

Card Speed

Speed ratings of an SD card is dependant on the sequential write and read speeds. The transfer speed of a memory card is very important for continuous shooting as well as video.

Slows SD cards can cut down the number of continuous images the Pentax K-70 can capture. This is because the camera's buffer is not able to write data to the card fast enough.

When recording video, a slow memory card can cause an abrupt end to recording. The video file could also end up being corrupted. If you intend to record video, it is critical the memory card you use meets the required minimum continuous write speed for video.

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 reduce the time it takes the transfer to finish.

Speed Class Rating

Example of where to find SD Card Speed Class
The 10 inside of the C means the card is Class 10.

The Class rating of a memory card is determined by the sustained write speed. SD cards that have a write speed of 10MB/s will be labeled Class 10.

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

Every brand of memory card that you can get will be Class 10. To discover the class rating of a card, look for a number inside of a C on the front label.

Ultra High Speed (UHS)

Example of an SD memory card with a UHS-I rating.
The UHS rating of a card can be determined by a Roman numeral I, II, or III on the label of the card.

The Ultra High Speed (UHS) bus is a feature often found in SDUC, SDXC, and SDHC cards. UHS memory cards to achieve increased read and write speeds.

Three separate versions have been specified. The three are UHS-I, UHS-II, and UHS-III.

You can find out the rating of an SD memory card by looking at the front of the card. If the card has UHS, a Roman numeral I, II, or III can be seen 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

Related Cameras

If you wanted to choose one, the 128GB SanDisk Extreme Pro is the best memory card for the Pentax K-70. You are now ready for any future camera you own.

Listed here are more pages on Pentax cameras related to the K-70:

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