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02-28-2011, 07:21 PM   #1
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Has anyone tried Sandisk Extreme Pro (45Mbyte/s) cards on the K-5

Okay, I admit I lost control and bought a Sandisk Extreme Pro card yesterday - waiting for it to arrive.

Is anyone else using this card and is there an improvement in write speed on the K-5?

I'm currently using the Sandisk Extreme (30 Mbyte/s) and it is significantly faster than my old PQI Class 6 card, but I wasn't sure the K-5 could take advantage of the 45Mbyte/s write speed

02-28-2011, 07:29 PM   #2
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I ordered one with my K-5, last week, but it didn't arrive on time, so I don't have it with me, yet. I'm also interested to hear if anyone has experience with them.
02-28-2011, 07:34 PM   #3
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Got the card a few days ago I must say its FAST........
03-01-2011, 01:00 AM   #4
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I ordered a pair, they should arrive by the end of the wekk, I'll compare them to my current Extreme III.

03-01-2011, 04:15 AM   #5
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I have the Sandisk Extreme Pro 16gig card and it seems to be working extremely well.
03-01-2011, 04:28 AM   #6
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I have an Extreme III, are you talking about the Extreme IV?
03-01-2011, 12:26 PM   #7
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QuoteOriginally posted by Student Quote
I have an Extreme III, are you talking about the Extreme IV?
No, it's the new Extreme Pro that Sandisk announced in Jan 2011:
SanDisk ships Extreme Pro SDHC UHS-I memory card: Digital Photography Review

I am not sure the K-5 is UHS-I compatible - when I receive the card I'll try and compare it with my Extreme and see if there is an improvement.
03-01-2011, 12:31 PM   #8
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No it's not compatible . Here what they say on the latest Firmware upgrade for SXDC card but the comment is for all SDHC
QuoteQuote:
Compatible with SDXC memory card. * Transfer rate is not compatible with UHS speed class.


03-01-2011, 12:42 PM   #9
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QuoteOriginally posted by bobmaxja Quote
No it's not compatible . Here what they say on the latest Firmware upgrade for SXDC card but the comment is for all SDHC
That just means the K-5 does not have the UHS-I 4-bit transfer mode, which allows up to 104MB/s.

Standard 1-bit transfer mode allows up to 25 MB/s - but many cards fall short of this theoretical transfer speed.

It will be interesting if the Extreme Pro gets closer to the theoretical limit compared to the Extreme. There's a lot more to the performance of a memory card than just the bus transfer speed.
03-01-2011, 12:51 PM   #10
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Hmm, I want one.
03-01-2011, 03:21 PM   #11
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I'm thinking about it.

Would you please look at http://https://www.pentaxforums.com/forums/pentax-k-5-forum/128924-writespeed...card-test.html and if possible do the test inside your K-5 and see what writespeed is possible in camera?

QuoteOriginally posted by RonHendriks1966 Quote
RAW:
- At iso 5000 files are uge, almost 30 Mb for a single file with no (hood) cap on. In 15 sec. the camera took 31 RAW that where 920 Mb and after 52 seconds the red light was out, giving a filewrite off 17,7 MB/s including all processing. In 60 seconds the K-5 took 58 RAW giving 1,736 Gb of filesspace to fill. The difference of 27 files giving 816 MB to write in 45 seconds -> 18,1 Mb/s

I think that is the limitation of the K-5 or my card or the combination. The card is a classe 10 32Gb PQ1 card, and writemax according to the manufacture is 24,5 Mb/s (for what it's word since I haven't tested it myself) with 30 Mb/s readspeed.
Basicly it's about creating more file-body then the camera can digest so you can see the difference between processor speed to process and writespeed to the card.

Thanks!
03-01-2011, 03:27 PM   #12
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Seriously overkill for normal photo taking but definitely handy if you shoot video a lot.
03-01-2011, 03:41 PM   #13
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QuoteOriginally posted by creampuff Quote
Seriously overkill for normal photo taking but definitely handy if you shoot video a lot.
I shoot a lot at 7fps and like the buffer to clear as quickly as possible. The Extreme was a lot better than my previous Class 6 card - I'm hoping to get a bit extra with the Extreme Pro.
03-01-2011, 03:45 PM   #14
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QuoteOriginally posted by Christine Tham Quote
I shoot a lot at 7fps and like the buffer to clear as quickly as possible. I'm hoping to get a bit extra with the Extreme Pro.
My thoughts to, a full buffer in RAW takes a real long time to clear, so shortening that time would be great.
03-01-2011, 03:55 PM   #15
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Seems like a waste of money to me. It's more than 5X the price of a class 10 card. I've never had a problem with video or the buffer with a standard card, and can wait a second or two if I really tax the card. I guess if you really need it for your job, then it would be worth it.
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