« on: March 13, 2014, 05:55:51 PM »
Ok, $150 for a 4"x6" is ridiculous. Want to bet he prints them out at Walgreens?
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Not good news, but not a surprise either:
I'm shocked I tell you, shocked.
I have to say that I do not agree about the SD slot being crippled. If the camera has been designed to use UDMA 7 CF cards it should have also been designed to accomodate UHS-1 SD cards. To the best of my knowledge the two specifications came out at about the same time. (Nov 2010 and May 2010 respectively). As Canon built the ability to save file to the two cards into the camera they should have made it a realistic proposition.
For anyone following this thread, and who is interested, I have formatted my UHS-1 SD cards and this makes no discernible difference to the time taken to the number of burst shots achievable or the time taken to clear the buffer (compared with the cards formatted in my laptop).
Not to worry, the 5DIII is still a brilliant camera. Pity I can't use it properly!
That is a reasonable point, but unfortunately Canon did not design it that way. The 5D mk3 does not support the faster UHS-1 (ultra high speed) standard for SD cards, which means that no matter which SD card you use the write speed cannot exceed 20MB/sec. What's worse is that if the 5D mk3 detects the presence of an SD card it sets the default write speed to the slower card - so the write speed of your CF card will be limited too. I shoot a lot of sports, and when I bought by 5d mk3 initially I accepted the idea that I needed two cards - in case there was a problem with one of them or so I could keep a RAW and JPEG copy of each file on separate cards. However, I was continually having problems with the buffer filling and I was not able to keep up with the action. Now I have removed the SD card completely and since then I have not had a problem. In my opinion having an SD clot on this camera is a complete waste of space - they would have done better to make two CF slots available.
I use the sandisk UDMA6 CF card which is rated at 90MB/sec. Never tried a UDMA7 card but at the moment I don't need it.
Like you I am a bit paranoid about losing photographs which is why one of the selling points of the 5DIII for me was the ability to write files to two separate cards. Pity that this function is effectively crippled! Any way, I'm off to do a low level format on my SD UHS-1 cards and then try them in the 5DIII to see if this makes and difference. As you say, the proof of the pudding is in-camera performance not in a computer.
mackguyver, Class 10 write speed is not 30MB/s it's a minimum of 10MB/s. I have dome a lot of work testing SD and microSD cards mainly because I was stupid enough to buy a SanDisk Ultra card which has 30MB/s emblazoned in large letters on the front. I was rather perplexed with the slow write speeds that I got so I tested the card. I used CrystalDiskMark, DiskSpeed.exe, h2testw and Bench32.exe. The real time write speeds in Windows 7 varied enormously but were mostly less than 10MB/s and averaged 4 to 5MB/s. The ONLY write speed result from all the tests that I carried out was 10.07MB/s from CrystalDiskMark. Needless to say SanDisk say that this single marginal and isolated result means that the card is within specification.
CrystalDiskMark 3.0.3 x64 (C) 2007-2013 hiyohiyo
Crystal Dew World : http://crystalmark.info/
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 44.554 MB/s
Sequential Write : 10.071 MB/s
Random Read 512KB : 0.000 MB/s
Random Write 512KB : 0.000 MB/s
Random Read 4KB (QD=1) : 0.000 MB/s [ 0.0 IOPS]
Random Write 4KB (QD=1) : 0.000 MB/s [ 0.0 IOPS]
Random Read 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]
Random Write 4KB (QD=32) : 0.000 MB/s [ 0.0 IOPS]
Test : 1000 MB [G: 91.1% (54.2/59.4 GB)] (x1)
Date : 2014/03/06 18:46:48
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)
I think that it is of interest that three Samsung Class 6 SD cards gave write speeds of 14-15MB/s and my Toshiba Class 10 microSD card gave a write speed of 14.6MB/s.
Moral: Don't believe the hype about SanDisk being a top class manufacturer!
@mikejkay I just did a quick test with the UDMA 7 160MB/s CF card set to raw, and SD card set to JPEG S1, and it really slowed down the buffer for 7 bracketed shots. The camera took all 7 shots, but the 'busy' symbol came up on the screen and there was a definite lag which does not occur when the SD card is removed.You don't have to remove the SD card, just don't write to it. It's hardware limited to 30MB/s which is "Class 10", whereas the CF card is UDMA7, so it's MUCH faster. Canon didn't cripple the SD slot, it was the fastest SD standard available when the camera was designed.
Thanks ton all. Looks like UDMA 7 is the way to go. Pity I spent all my money on the 5DIII...and the 'L' glass. Sticks in the gullet a bit to spend £100+ on a memory card. Unfortunately, I carry 1x32GB and 3x16GB as I am aay for several months at a time.