Pentax K-50 Memory Card Compatibility

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

The Pentax K-50 can use SD, SDHC, and SDXC memory cards. Video and burst shooting need SD memory cards with fast card write speeds.

The wrong card can spoil the overall performance of your camera.

If you are in a rush, here's the best card you can buy for the Pentax K-50:

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

SD memory cards are now significantly less expensive than when the camera was newly unveiled.

With the price range staying so low, it does not make sense to get anything other than a pro-level SD card.

The best SD cards I use have been the SanDisk Extreme Pro, Lexar Professional, and PNY Elite Performance models. I have never encountered a card physically fail or corrupted data with those SD memory cards.

Every last complication I have had has been with generic unbranded memory cards. Trying to save a little bit of money is not worth the cost if your K-50 is not going to function properly.

A great way to save money is to find a lower storage capacity memory card from a quality manufacturer. Because of this, you'll not have to be anxious about the photographs stored on the SD 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-50 SD Card Compatibility

Only SD, SDHC, and SDXC cards can be used by the Pentax K-50. For best performance, be certain that your camera is using the most recent firmware installed.

The newest cards, SDUC (Secure Digital Ultra Capacity), are not able to be used with the K-50.

You should be aware of the 4 different kinds of Secure Digital (SD) cards that can be bought. They are split up by their storage 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 is a fast approximation of how many max-quality JPEGs shots you should be expecting to save on an SD 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 dependant on the continuous write and read transfer speeds. SD memory card speed is very important for video as well as continuous shooting.

Slows SD cards can cut down the number of continuous images the Pentax K-50 can take. This is because the camera's buffer will not be 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 could also be corrupted. If you are going to record video, it is essential the memory card you use meets the required minimum continuous write speed for video.

Read speed is important for file transfers to a computer. If you have cards that are full, a memory card with a fast read speed will save you time.

Speed Class Rating

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

An SD card receives a Class rating in accordance with its continuous write speed. SD cards that have a write speed of 10MB/s are labeled as 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 SD card that you can purchase online will be rated Class 10. 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 a feature found in SDHC, SDXC, and SDUC cards. The UHS bus makes it possible for increased file transfer rates.

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

Look at the front of the SD card to determine the rating of a card. If the SD card has UHS, a Roman numeral I, II, or III will be on the front 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

Related Cameras

If you required to choose one, the 128GB SanDisk Extreme Pro is the best memory card for the Pentax K-50. Any future camera you own, you will know what SD memory card to buy.

Here are a few more pages on Pentax cameras with similar needs as the K-50:

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