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.
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