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07-27-2015, 06:54 AM   #1
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Fastest SD Card for DSLR

I used to manage best buy. But that was 10 years ago. Technology flies by and I want to make sure I'm shootin w the best card possible.

I have a 64MB Lexar class 10 that has a read speed of 150mb/s

I see one out now that reads at 300mb/second!

Do I need this ?


Why are most of the 32mb cards only 40-90 mb/s?

07-27-2015, 07:51 AM   #2
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The only reason I could imagine a 150mb/s write speed being needed is for 4k video, I don't know why 150/300 read is necessary considering the cost unless you want to spend less time uploading your images. My Samsung Pro sd card that tops out at 90 read/80 write speed never bottlenecks me with continuous shooting or video, and uploads all my images within a few minutes.

I imagine as higher megapixel cameras come about and 4k becomes standard sd cards will become faster to keep up. As of now I think most cameras don't have the UHS-II hardware, most are UHS-I which limits the speed to 90 I believe.

Last edited by Dipsoid; 07-27-2015 at 08:00 AM.
07-27-2015, 08:46 AM   #3
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QuoteOriginally posted by Sandmansc Quote
I used to manage best buy. But that was 10 years ago. Technology flies by and I want to make sure I'm shootin w the best card possible.

I have a 64MB Lexar class 10 that has a read speed of 150mb/s

I see one out now that reads at 300mb/second!

Do I need this ?


Why are most of the 32mb cards only 40-90 mb/s?


First of all the read speed is not as interesting as the write speed. The read speed is of interest if you want to transfer photos quickly to a hard drive. Most of my cards are 45 Mb/s write speed which i more than adequate for singel shots. I also have a 90 Mb/s write speed that comes in handy for continuous shooting. I use a K-3 and a K-5II and have never seen any use for faster cards. I never shoot video.
07-27-2015, 10:05 AM   #4
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For still shooting you don't need the fastest SD cards out there as most cameras cannot actually write fast enough to utilise that speed. If you want to know whether something like a 150 MB/sec. card makes sense you need to find out your camera's write speed.

07-27-2015, 11:57 AM   #5
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QuoteOriginally posted by Sandmansc Quote
I used to manage best buy. But that was 10 years ago. Technology flies by and I want to make sure I'm shootin w the best card possible.

I have a 64MB Lexar class 10 that has a read speed of 150mb/s

I see one out now that reads at 300mb/second!

Do I need this ?


Why are most of the 32mb cards only 40-90 mb/s?
No Pentax DSLR currently supports the 150Mb/s+ UHS-II cards, so you won't get any benefit from them, but you could always pick some up to be ready for the future.

If your DSLR has "UHS-I" written on the SD door, a 90Mb/s card will deliver optimal performance (K-3, K-S2, 645Z). All older models max out around 30 Mb/s (write speed), so a card with that speed or higher should suffice.

Adam
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07-28-2015, 01:04 AM   #6
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Original Poster
Wow I appreciate all the answers.

How would I find out my cameras capabilities concerning write speed ?

I have the K-50
07-28-2015, 03:24 AM   #7
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QuoteOriginally posted by Sandmansc Quote
How would I find out my cameras capabilities concerning write speed ?

I have the K-50
Check Adam's answer - according to what he wrote your K-50 goes about 30 MB/s.
07-31-2015, 05:56 AM   #8
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Good deal. Thanks guys.

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