Pentax K-7 Memory Card Compatibility

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

SDXC, SDHC, and SD memory cards are compatible with the Pentax K-7. For burst shooting and video, it is critical the SD memory card you use has a fast write speed.

You can mess up the functionality of your camera by using the wrong SD memory card.

If you're in a hurry, here's the best SD card you can buy for the Pentax K-7:

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

Cards are now substantially more affordable than at the time the camera was newly unveiled.

Due to costs being so affordable, it does not make financial sense to spend money on anything but a professional-quality card.

SanDisk Extreme Pro, Lexar Professional, and PNY Elite Performance cards have great performance and build quality. I have not endured corrupted data or a card failure with any of those memory cards.

Every one of the issues I have dealt with has been because of low-cost unbranded memory cards. Seeking to save around a dollar isn't worthwhile if your K-7 is going to have problems.

A shrewd way to save money is to grab a smaller capacity memory card from a high-quality supplier. By doing this, you will know your shots are secure 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-7 SD Card Compatibility

Only SDXC, SDHC, and SD memory cards can be used by the Pentax K-7. For best performance, ensure that your camera has the most up to date firmware installed.

The newest SDUC (Secure Digital Ultra Capacity) cards, cannot be used in the K-7.

Four separate kinds of Secure Digital (SD) cards that you need to know about. They are broken up by 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

Here is a quick approximation of how many max-quality JPEGs photographs you should be expecting to fit 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

The speed rating of an SD card is classified by the sequential write and read speeds of the card. SD card continuous write speed is very important for video in addition to continuous shooting.

Slows cards can cause a reduction in the number of continuous frames the Pentax K-7 can take. This is because the camera's buffer is not able to write data to the memory card fast enough.

When recording video, a slow card can cause a sudden end to shooting. The video file may also end up being corrupted. If you are going to shoot video, it is important the SD card you use meets the required continuous write speed for video.

Read speed is important for file transfers to a computer. If you are filling up cards with images or video, a card with a fast read speed will cut down on the transfer 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.

The Class rating of a memory card is related to the sustained write speed. SD cards that have a minimum write speed of at least 10MB/s will be rated 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-name memory card that you can buy today will be rated Class 10. To discover the class rating of an SD card, look for a number inside of the C on the sticker.

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 found in SDUC, SDXC, and SDHC cards. UHS memory cards to achieve increased write speeds.

Three different specifications have been created. They are UHS-I, UHS-II, and UHS-III.

You can figure out the UHS rating of a card by examining the label. If the SD card has UHS, a Roman numeral I, II, or III can be found 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 had to choose one, the 128GB SanDisk Extreme Pro is the best memory card for the Pentax K-7. Any future camera you buy, you will know what SD memory card to get.

The following are more posts on cameras with the same specifications as the K-7:

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