From the helpful link Cotty provided and discussion here and other reading, I
have concluded:
a. Higher numbers are “better” for values of better ranging from -50mbs
to +50mbs, more or less.
b. The main concern is with read or write speed when streaming video.
c. I don’t know why I should care.
Really, I don’t know why I should care. I have reluctantly assumed that all
this kerfluffel about video speed in fact relates in a somewhat linear fashion
to what I do care about which is how fast still images move from the internal
camera buffer to the SD card in the slot. But I have also assumed that the
buffer-to-card process has a lot to do with the camera’s firmware and maybe not
so much to do with any limitations of the card. Is there anything anyplace that
tells us what the minimum necessary “speed rating” for SD is for a given
camera? Specifically, newer large-datafile cameras like the K-5, K-5ii, K-3,
K-3ii, K-1, 645D, 645Z shooting still images and not movies…
> On Feb 21, 2016, at 7:45 PM, Mark C <pdml-m...@charter.net> wrote:
>
> I didn't know about the extreme plus. Here are the links to 32 gb Extreme,
> Pro and Plus cards on B&H. It looks like the Plus is discontinued.
>
> Extreme Pro -
>
> http://www.bhphotovideo.com/c/product/824140-REG/SanDisk_SDSDXPA_032G_A75_Extreme_Pro_32_GB.html
>
> Extreme -
>
> http://www.bhphotovideo.com/c/product/1182602-REG/sandisk_sdsdxne_032g_gnci2_extreme_32gb_sdhc_u3.html
>
> Extreme Plus -
>
> http://www.bhphotovideo.com/c/product/992490-REG/sandisk_sdsdxs_032g_a46_32gb_sdhc_extreme_class.html
>
> I just noticed that the extreme and the extreme plus are water / shock / xray
> proof. So that's something. Maybe.
>
>
>
> On 2/21/2016 7:09 PM, Larry Colen wrote:
>>
>>
>> Mark C wrote:
>>> 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 am having a hard time telling the difference between the extreme plus and
>> the extreme pro. Their naming system is complete bafflement, which is
>> probably their goal.
>>
>>
>>
>
>
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