Pentax K-S1 Memory Card Compatibility

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

The Pentax K-S1 is able to use SDXC, SDHC, and SD memory cards. Continuous shooting and video need SD memory cards with fast write speeds.

The performance of your camera can be decreased by using an inadequate card.

Want to skip the tech specs? Here is my recommendation on the SD memory card for use with the Pentax K-S1:

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-S1, the price of SD cards has come way down.

Seeing as how inexpensive prices are, it would not make financial sense to purchase anything besides a professional-level memory card.

SanDisk Extreme Pro, Lexar Professional, and PNY Elite Performance cards have all been reliable for me. I have not endured a card become inoperable or corrupted data with those SD cards.

All the trouble I have dealt with has been because of cheap unbranded SD cards. Attempting to save around a buck isn't worth it if your K-S1 does not function properly.

To save money, get a smaller capacity memory card from a high-quality company. By doing this, you'll know your photos are safe and sound on the memory 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-S1 SD Card Compatibility

Only SDXC, SDHC, and SD cards can be used by the Pentax K-S1. Ensure you have the most recent firmware installed on your camera for the best compatibility.

The newest cards, SDUC (Secure Digital Ultra Capacity), can't be used with the K-S1.

You need to understand the four different kinds of Secure Digital (SD) cards that can be found. You can identify them according to their size.

  • 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

The following is a quick estimation of the total number of large JPEGs pictures you should be expecting to be saved on a 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 memory card is classified by the continuous read and write transfer speeds of the card. The write speed of a card is important for clearing the camera buffer for continuous shooting as well as recording video.

Slows SD cards can cut down the number of continuous photos the Pentax K-S1 can take. This is because the camera's buffer is not able to write data to the SD card fast enough.

When recording video, a slow card can cause an abrupt end to shooting. The video file could also be corrupted. If you are going to record video, it is crucial the card you use meets the required write speed for video.

Read speed is important for transferring files to a computer or laptop. If you have cards that are full, a memory card with a fast read speed will decrease the time it takes the transfer to complete.

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 continuous write speed of a card is what determines the Class rating. Memory cards that have a minimum 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 name-brand memory card that you can get will have a Class 10 rating. You can discover the class rating of an SD memory card by looking for a number inside of the C on the 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 bus (UHS) is built into SDUC, SDXC, and SDHC cards. UHS cards to have increased read and write speeds.

There are 3 separate versions. They are called UHS-I, UHS-II, and UHS-III.

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

  • 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-S1. The memory card also has great compatibility with other cameras.

Here are a few more posts on Pentax cameras similar to the K-S1:

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