Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Learning
Other Photography Equipment
Sandisk or Lexar SD cards?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="PapaST" data-source="post: 233775" data-attributes="member: 8330"><p>I applaud the youtuber that actually went out and did the real-world tests on those cards. But in my opinion that test is flawed and misleading. Basically his results were as follows:</p><p></p><p>$10 PNY 20MB/s SD card took 20 seconds to clear the buffer</p><p>Sandisk 45MB/s Extreme SD card took 16 seconds to clear the buffer</p><p>Sandisk 95MB/s Extreme Pro SD card took 16 seconds to clear the buffer</p><p></p><p>finally</p><p></p><p>Sandisk 60MB/s Extreme CF card took about 7 seconds to clear the buffer.</p><p></p><p>Looking at those results you'd think the Extreme Pro SD was a waste and one could argue that the Extreme SD card was also a waste of money.</p><p></p><p>I think the youtuber made the assumption that the write speeds of the camera were:</p><p></p><p>1. equal between the SD and CF slots</p><p>2. the camera's write speeds of the SD slots could write faster than any card you put in there could accept (in this case faster write speeds than the 95MB/s Extreme Pro card)</p><p></p><p>From quick research I found this article pertaining to the camera he tested (<span style="color: #333333"><span style="font-family: 'arial'">Canon 5D Mark III).</span></span></p><p><span style="color: #333333"><span style="font-family: 'arial'"></span></span></p><p><span style="color: #333333"><span style="font-family: 'arial'"></span></span><a href="http://www.borrowlenses.com/blog/2013/01/tip-optimize-canon-5d-markiii-write-speeds-avoid-sd-cards/" target="_blank">Blog @ BorrowLenses</a></p><p></p><p>Basically the article claims the speeds between the SD and CF slots are different. And more importantly that the SD slot is only rated as 133x (which I believe translates to 20MB/s). To me this explains why the CF card clears much faster AND points to me why the Extreme and Extreme Pro have identical test times. They clear at the same rate because they are capped at 20MB/s. As for the PNY card taking longer even though it's rated at 20MB/s. I can only guess that you get what you pay for, in this case $10.</p><p></p><p>I think if he really wanted to illustrate his point he should have done apples to apples. Use a Lexar card rated for the same speeds as the Sandisk counter-parts and compare.</p><p></p><p>Here's an excerpt from that article:</p><p></p><p><em><span style="color: #0000cd"><span style="font-family: 'Arial'">“…YOU DO NOT want to put a card in the SD slot. Why? Because, for some reason unbeknownst to me, Canon decided to build the </span></span><a href="http://www.borrowlenses.com/product/Canon_5DIII" target="_blank"><span style="color: #0000cd">5D Mark III</span></a><span style="color: #0000cd"><span style="font-family: 'Arial'"> with one very fast CF slot which supports the newer UDMA7 protocol and a standard SD card slot which does NOT support the high speed standard (called UHS – for Ultra High Speed). This is really strange because many other cameras have come out with UHS1 compatible slots over the last year. Without UHS support, the top speed that can be achieved by the SD card is 133x. This is true even if you purchase a 600x SD card and insert it in the camera. The best you will get is 133x…”</span></span></em></p></blockquote><p></p>
[QUOTE="PapaST, post: 233775, member: 8330"] I applaud the youtuber that actually went out and did the real-world tests on those cards. But in my opinion that test is flawed and misleading. Basically his results were as follows: $10 PNY 20MB/s SD card took 20 seconds to clear the buffer Sandisk 45MB/s Extreme SD card took 16 seconds to clear the buffer Sandisk 95MB/s Extreme Pro SD card took 16 seconds to clear the buffer finally Sandisk 60MB/s Extreme CF card took about 7 seconds to clear the buffer. Looking at those results you'd think the Extreme Pro SD was a waste and one could argue that the Extreme SD card was also a waste of money. I think the youtuber made the assumption that the write speeds of the camera were: 1. equal between the SD and CF slots 2. the camera's write speeds of the SD slots could write faster than any card you put in there could accept (in this case faster write speeds than the 95MB/s Extreme Pro card) From quick research I found this article pertaining to the camera he tested ([COLOR=#333333][FONT=arial]Canon 5D Mark III). [/FONT][/COLOR][url=http://www.borrowlenses.com/blog/2013/01/tip-optimize-canon-5d-markiii-write-speeds-avoid-sd-cards/]Blog @ BorrowLenses[/url] Basically the article claims the speeds between the SD and CF slots are different. And more importantly that the SD slot is only rated as 133x (which I believe translates to 20MB/s). To me this explains why the CF card clears much faster AND points to me why the Extreme and Extreme Pro have identical test times. They clear at the same rate because they are capped at 20MB/s. As for the PNY card taking longer even though it's rated at 20MB/s. I can only guess that you get what you pay for, in this case $10. I think if he really wanted to illustrate his point he should have done apples to apples. Use a Lexar card rated for the same speeds as the Sandisk counter-parts and compare. Here's an excerpt from that article: [I][COLOR=#0000cd][FONT=Arial]“…YOU DO NOT want to put a card in the SD slot. Why? Because, for some reason unbeknownst to me, Canon decided to build the [/FONT][/COLOR][URL="http://www.borrowlenses.com/product/Canon_5DIII"][COLOR=#0000cd]5D Mark III[/COLOR][/URL][COLOR=#0000cd][FONT=Arial] with one very fast CF slot which supports the newer UDMA7 protocol and a standard SD card slot which does NOT support the high speed standard (called UHS – for Ultra High Speed). This is really strange because many other cameras have come out with UHS1 compatible slots over the last year. Without UHS support, the top speed that can be achieved by the SD card is 133x. This is true even if you purchase a 600x SD card and insert it in the camera. The best you will get is 133x…”[/FONT][/COLOR][/I] [/QUOTE]
Verification
Post reply
Forums
Learning
Other Photography Equipment
Sandisk or Lexar SD cards?
Top