I've had the plastic cases crack, usually in such a was as to cause the
write protect tab to be lost on several SanDisk cards. The last one
that happened to I tried to take advantage of their lifetime guarantee,
but it looked as if it would entail more than $10.00 worth of effort,
and since that was about it's cash value I found it easier to simply buy
a replacement.
On 2/22/2016 2:08 PM, Ken Waller wrote:
FWIW, I recently purchased another SanDisk Extreme 32GB to augment an
exsting card I purchased with my K3. Both are marked HC1. the older
card is rated 45 MB/s, speed class 1 with the newer card marked 90
MB/s, speed class 3.
Haven't done any objective tests but I haven't noticed a any
significant difference in write speedhooting just stills.
BTW - I've used only SanDisk since my *istD and have never been let down.
Kenneth Waller
http://www.pentaxphotogallery.com/kennethwaller
----- Original Message ----- From: "Mark C" <[email protected]>
Subject: Re: Can someone explain to me SD card speed ratings?
My own two cents is that you really have to research the detailed
specs on the card you want to buy, paying attention to the actual
write speed. The ratings and classes are so broad that cards with
seemingly identical ratings can have significantly different
performance.
I recently added a couple of 32 gig memory cards. I compared San Disk
Extreme Pro and San Disk Extreme. Both are USH-1. Both are marked
"HC-1 U3 C10." The Pro is marked "95 MB/S" and the Extreme is marked
as "90 MB/S." It seemed like their specs were very close - but then
looking at max write speed I saw that the Pro is rated for 90 MB/S
while the Extreme is rated for only 40. The rate stamped on the cards
themselves is the read speed.
So - the Extreme Pro is actually 2x as fast for what matters (write
speed). But the ratings looked to be practically identical.
I looked very carefully at the cards after getting burned buying a
couple 16 gig Sony cards, also rated HC-1 U3 C10 and listed as 40
MB/S. Reality is a fairly slow 10 MB/S write speed. Not good when
shooting in HS burst mode on the K3.
Mark
On 2/19/2016 4:17 PM, Larry Colen wrote:
I can see that when I get a K-1 I'm going to need some more memory
cards. I'll want two to keep in the camera, and (at least) a couple
of spares so that I don't have to erase the cards until I'm done
processing, certain of my backups etc.
I went to look at them online and they are variously rated with
Class 10, UHS-1, U1, U3. 80Mb/S max write speed, 10 Mb/S min write
speed and so forth.
Is there a clear concise description of what to look for in an SD
card for photographic applications?
Related question: specific recommendations for ones to look for,
ones to avoid, and particularly good deals.
--
I don't want to achieve immortality through my work; I want to achieve
immortality through not dying.
-- Woody Allen
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