Which SD card for Pentax K-30?

Started Nov 24, 2012 | Questions
Simon Devlin
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Which SD card for Pentax K-30?
Nov 24, 2012

Hello I'm new here,

I just ordered a K-30, my first DSLR and I am wondering which is the best SD card to get in terms of transfer speed.

I'll probably choose Sandisk and if so can the K-30 actually utilise the Extreme Pro at 90MB/s?

Or should I choose:

Ultra @ 30MB/s

Extreme @ 45MB/s

Thanks.

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Pentax K-30
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rustdream
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Re: Which SD card for Pentax K-30?
In reply to Simon Devlin, Nov 24, 2012

I have a SanDisk Ultra 16Gb loaded in the K-30. It takes 6 RAW frames in Continuous Shooting mode. According to camera specs, this is the expected result.

I don't think a faster card would improve anything.

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GordonBGood
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Re: Which SD card for Pentax K-30?
In reply to rustdream, Nov 24, 2012

rustdream wrote:

I have a SanDisk Ultra 16Gb loaded in the K-30. It takes 6 RAW frames in Continuous Shooting mode. According to camera specs, this is the expected result.

I don't think a faster card would improve anything.

You are right that a faster card would not improve the continuous shooting rate until the camera buffer is full, but a faster card can improve the rate at which that buffer is flushed and thus the full buffer rate.

Regards, GrdonBGood

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leopold
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Re: Which SD card for Pentax K-30?
In reply to GordonBGood, Nov 24, 2012
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Cideway
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Re: Which SD card for Pentax K-30?
In reply to Simon Devlin, Nov 25, 2012

Assuming the K30 is anything like the K5, I did some testing with a Extreme Pro and Compared it to some other cards that I had.

http://www.cideway.com.au/2011/12/taking-it-to-the-extreme/

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Simon Devlin
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Re: Which SD card for Pentax K-30?
In reply to leopold, Nov 25, 2012

Thanks everyone,

I know the faster the K-30 can write its buffer or cache to the card the better, meaning that once I take 6 continuous shots they will be transferred to the card and I can take another 6 continuous shots quicker again.

I read the K-30 is compatible with SDXC and Lexar have up to 600x in this format. If only I could know the K-30's ultimate transfer speed to SD cards.

My computer only has USB 2.0 so I don't need the fast card for this transfer purpose.

I don't even have the camera yet as they are obviously popular and currently sold out.

Simon

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Stephenhampshire
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Re: Which SD card for Pentax K-30?
In reply to rustdream, Nov 25, 2012

With my K30, I get 10 or 11 RAW* on Continuous Hi - my SanDisk Extreme 45mb/s cards clear the buffer in about 8 seconds from last shot;the 30mb/s ones seem to take a second or so longer, the 20mb/s ones pretty much the same, c 10s- might just be my error in measuring. Other class 10 cards take longer- 15s and up for some of them, although my Innov8 class 10(which was bundled with my K5) is just as fast as the San Disck Extreme 45!

I have pretty much standardised on the SanDisk Extreme 30 0r 45 MB/s now, they are not expensive (as the Pro version is now top of the range) and I have never had a problem with any of my SanDisk cards

Stephen

* Average scene, RAW file size about 14Mb

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Simon Devlin
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Re: Which SD card for Pentax K-30?
In reply to Stephenhampshire, Nov 25, 2012

Stephenhampshire wrote:

With my K30, I get 10 or 11 RAW* on Continuous Hi - my SanDisk Extreme 45mb/s cards clear the buffer in about 8 seconds from last shot;the 30mb/s ones seem to take a second or so longer, the 20mb/s ones pretty much the same, c 10s- might just be my error in measuring. Other class 10 cards take longer- 15s and up for some of them, although my Innov8 class 10(which was bundled with my K5) is just as fast as the San Disck Extreme 45!

I have pretty much standardised on the SanDisk Extreme 30 0r 45 MB/s now, they are not expensive (as the Pro version is now top of the range) and I have never had a problem with any of my SanDisk cards

Stephen

* Average scene, RAW file size about 14Mb

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Thank you Stephen,

I think I'll order a Sandisk 45MB/s for now seeing as the 95MB/s is very pricey at this time of writing. I'll put the money saved towards a UV or polarised filter for the 18-55 WR lens that I am waiting on.

It would be interesting to compare the 45MB/s and 95MB/s to compare buffer clearance times.

Simon (camera-less LOL)

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Simon Devlin
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Re: Which SD card for Pentax K-30?
In reply to Stephenhampshire, Nov 25, 2012

Just seen this test from another site:

SD Card comparison

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Walt_A
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Re: Which SD card for Pentax K-30?
In reply to Simon Devlin, Nov 25, 2012

Simon Devlin wrote

........

It would be interesting to compare the 45MB/s and 95MB/s to compare buffer clearance times.

......

If it's of any help imaging resource tested the K-30 performance with a SanDisk Extreme Pro 95MB/s UHS-I card, they say it took 5 seconds to clear on Continuous Hi mode RAW (8 frames). See here http://www.imaging-resource.com/PRODS/pentax-k30/pentax-k30A6.HTM

Also Rob Galbraith does some tests on cameras and sd cards here http://www.robgalbraith.com/bins/camera_wb_multi_page.asp?cid=6007-12454

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Stephenhampshire
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Re: Which SD card for Pentax K-30?
In reply to Simon Devlin, Nov 25, 2012

That is interesting, see also the other post re the 95MB/s card- does seem to be a bit of an advantage there....my results from other brands such as Transcend seem more variable than the SanDisk cards, for instance I have two 16Gb Transcend class 10's, one with a black label and one a yellow, and the black labelled one clears about twice as fast, about 8 s again. As SanDisk cards are not that much more than the other makes, but seem to be labelled better and to be more consistend, I will try them. The RAW buffer on the K30 is a lot smaller than the K5, so buffer clearance times are more of an issue.

If you are in the UK Simon, I would say that it is worth having a look at MyMemory UK-  I have used them a fair bit over the past few years and they are well-priced and quick to respond, and I've never had a problem with lost items (I think they are Channel Island based) unlike several other major internet retailers where I have had packages opened in tranist and cards stolen on more than one occasion.

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Simon Devlin
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Re: Which SD card for Pentax K-30?
In reply to Stephenhampshire, Nov 25, 2012

I am in Belfast Stephen and have used MyMemory before,

I have used Play and never had anything stolen from anyone.

I think I will get the 8GB Sandisk Extreme Pro 95MB/s from Play for £15.80p

If RAW file sizes are 14MB maximum I'll get approximately 500 photos which is plenty for now. I can always get a 32GB or whatever in the future.

I can always use the Extreme Pro as a specialist fast buffer clearance card.

Simon

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rmalbers
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Re: Which SD card for Pentax K-30?
In reply to Cideway, Nov 25, 2012

There was just a thread on this, you want as fast as possible 'write' speed.

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Stephenhampshire
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Re: Which SD card for Pentax K-30?
In reply to Simon Devlin, Nov 25, 2012

Sounds good. The 16gb cards show 612 available shots in RAW on my K30, but actually I get nearer 640. Enjoy the camera it is a good'un, if the buffer was bigger it would replace my K51

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DarylK
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Re: Which SD card for Pentax K-30?
In reply to Simon Devlin, Nov 25, 2012

Looks like you're getting some good feedback.

My experience with my K5 leads me to recommend Extreme III or equal or better.  I purchased a Sandisk Ultra and was quite disapointed with its slower performance.  It's in my bag only as a backup should I run out of space on my Extreme III cards.

Daryl

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Simon Devlin
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Youtube video testing Sandisk 95MB/s Extreme Pro versus Sandisk 30MB/s Extreme III
In reply to Stephenhampshire, Nov 27, 2012
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Simon Devlin
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Youtube video testing Sandisk 95MB/s Extreme Pro versus Sandisk 30MB/s Extreme III
In reply to DarylK, Nov 27, 2012
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DarylK
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Re: Youtube video testing Sandisk 95MB/s Extreme Pro versus Sandisk 30MB/s Extreme III
In reply to Simon Devlin, Nov 27, 2012

Thanks. Big difference between the Pro and Extreme III based on the video. If they did the same test with an Ultra, would probably take a minute or so (wild speculation on my part) to clear buffer. They make a good point in the video that the Pro card would be especially important for sports shooting.

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jamesm007
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Re: Which SD card for Pentax K-30?
In reply to Simon Devlin, Nov 28, 2012

I wrote the other post showing you need fast write time in the field. However I should have been more clear, I said no video SDHC interface. Your K30s, K5, and so on, have much better/faster interfaces and can take more advantage of Sandisk Extreme cards. The SD card field is growing (interfaces) and getting more confused. Just get a class 10 and all is OK. Yea a Sandisk might buy a bit more speed but.  No a Sandisk may buy a lot more speed. Only you guys can test SD cards.

OP, go with the ones proven (times) in other cameras of your type, not test charts.

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jamesm007
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Re: Which SD card for Pentax K-30?
In reply to jamesm007, Nov 28, 2012

jamesm007 wrote:

I wrote the other post showing you need fast write time in the field. However I should have been more clear, I said no video SDHC interface. Your K30s, K5, and so on, have much better/faster interfaces and can take more advantage of Sandisk Extreme cards. The SD card field is growing (interfaces) and getting more confused. Just get a class 10 and all is OK. Yea a Sandisk might buy a bit more speed but. No a Sandisk may buy a lot more speed. Only you guys can test SD cards.

OP, go with the ones proven (times) in other cameras of your type, not test charts.

I should be even more clear, it seems Stephen has done all the work for you. Buy what he recommends. Or others here.

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