Pentax K100D Memory Card Compatibility

By Nathaniel Stephan
Last Updated: October 25, 2019
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Olympus SD Memory Card Compatibility

Using a compatible SD card is crucial for obtaining the best results out of your camera. Attempting to use a memory card that is Larger than 32GB can result in an error or reduce the performance of the K100D's operation.

The Pentax K100D uses SDHC and SD memory cards. That means that the maximum card size you are able to use is 32GB.

Do not use a slow card. SD memory cards that don't have a fast enough transfer rate will decrease continuous shooting and can prevent video from being shot.

If you're in a hurry, here's the best SD memory card you can buy for the Pentax K100D:

SanDisk Extreme Pro 32GB SDHC Memory Card

The absolute best card you can buy for the camera.

64GB or larger cards are not compatible with the camera.

Best SD Cards

Since the intro of Pentax K100D, the price of memory cards has come way down.

Seeing as to how low the cost is, it does not make sense to pick anything but a professional-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 failure or corrupted data with those SD memory cards.

All the complications I have had have been when using low-cost unbranded memory cards. Trying to save a buck isn't worth it if your K100D is going to have problems.

If you want to save some money, buy a smaller capacity memory card from a quality manufacturer. Because of this, you'll know your shots are safe on the SD memory card.

Recommended SD Cards

SanDisk Extreme Pro 32GB SDHC Memory Card

  • Best value for the money.
  • Read speeds of up to 95MB/s; write speeds of up to 90MB/s.
  • Shock-proof, temperature-proof, waterproof, and x-ray proof.

SanDisk Ultra 32GB SDHC Memory Card

  • Quick transfer speeds up to 80MB/s.
  • Class 10 rating for Full HD video (1080p).
  • Waterproof, temperature proof, X-ray Proof, magnet-Proof, and shockproof.

Lexar Professional 633X 32GB SDHC UHS-I Memory Card

  • High-speed, Class 10 performance.
  • UHS-I technology for a read transfer speed up to 633x (95MB/s).
  • High-speed file transfer from card to computer to dramatically accelerate workflow.

Pentax K100D SD Card Compatibility

You can only use SD and SDHC memory cards with the Pentax K100D. Check to be sure that your camera has the most recent firmware installed.

SDXC or SDUC memory cards are unable to be used in the K100D.

Four different types of Secure Digital (SD) cards exist that you need to be aware of. SD memory cards can be identified based on the card's capacity.

  • 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.

Image Capacity

Olympus SD Memory Card Contacts

Here is an estimation of how many large JPEGs you can expect to fit on a card:

  • 4GB - 1,160 images
  • 8GB - 2,320 images
  • 16GB - 4,640 images
  • 32GB - 9,280 images

Speed, Class, & UHS Ratings

Card Speed

The speed rating of an SD memory card is determined by the sequential read and write speeds. SD card file write speed is important for video as well as continuous shooting.

A slow card can reduce the number of continuous images the Pentax K100D can take. This is because the buffer in the camera is not able to write to the card quickly enough.

With video, a slow SD card can cause recording to stop. The video file could also be corrupted. If you intend to shoot video, it is critical the card you use meets the required continuous write speed for video.

Card read speed is nice to have for file transfers to a computer or laptop. If you are filling up cards with images or video, a 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.

The Class rating of a card is based on the sustained write speed. Memory cards that have a write speed of at least 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 memory card that you can buy online will be rated Class 10. To determine the class rating of a card, find a number inside of a 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 (UHS) bus is found in SDHC, SDXC, and SDUC cards. The UHS bus memory cards to achieve faster transfer rates.

Three different specifications exist. They are UHS-I, UHS-II, and UHS-III.

Look at the front of the SD card to find the UHS rating of an SD card. If the SD 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

Related Cameras

Taking the details into consideration, SanDisk 32GB Extreme Pro is the best Pentax K100D memory card. You are now also prepared for any future camera you own.

Here are a few more pages on cameras similar to the K100D:

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