p.2 #2 · What size CF card do you use in your Canon 1D Mk IV?
Thanks, Lars.
Aug 15, 2012 at 12:58 PM
Lars Johnsson Offline • • • • • • • Upload & Sell: Off
p.2 #3 · What size CF card do you use in your Canon 1D Mk IV?
OntheRez wrote:
Lars,
Thanks. I went rooting thru the Amazon offerings and noted that the same color, appearance, size, etc., Transcend in some cases says UDMA7 plus a little movie director "take" symbol. Other than that the card is identical to my UDMA6 card I'm currently shooting.
D*mn stupid way to market/label cards!
Thanks for the help,
Robert
When they started to sell those cards, there didn't exist any UDMA 7 cards. They are new cards. So all cards from every brand like Transcend, Sandisk, Lexar and similar brands are replacing their older cards with the new UDMA 7 cards.
p.2 #4 · What size CF card do you use in your Canon 1D Mk IV?
There seems to be a lot of negative reviews of the 32 GB 400x UDMA 7 CF card on Amazon.
Not saying it's a bad card or anything, but all those negative reviews are a bit disconcerting.
Esp since I'm considering the cards for a "trip of a lifetime" to Jasper, Banff, the Icefields Parkway, the Triple D Game farm, Yellowstone National Park, Grand Tetons, Horseshoe Bend, Antelope Canyon, the Grand Canyon, Saguaro National Monument, White Sands National Monument, and the Redwoods National Park, and the California/Oregon coast.
So I don't want to have to worry about the card failing, or becoming corrupted, and losing all those photos.
Of course anything is possible with any brand of CF card, but there are just a bit too many negative reports for me not to be concerned.
Aug 15, 2012 at 01:23 PM
Lars Johnsson Offline • • • • • • • Upload & Sell: Off
p.2 #5 · What size CF card do you use in your Canon 1D Mk IV?
Do you really read and care about card reviews at Amazon?
For what it's worth: I have bought and used more than 100 Transcend cards in the last ten years. And never had a failure
p.2 #7 · What size CF card do you use in your Canon 1D Mk IV?
Transcend CF cards are the only brand I haven't had a problem with, though I have only used Transcend, Lexar and Sandisk on a regular basis. Mind you, my most recent experience has been exclusively with the 600x UDMA-6 cards, not the 400x. You can get the 600x 16GB from B&H for $50. My GF has fried a couple Transcend SD cards, but ironically, those cards worked fine for a long time in my equipment until she inherited them. We suspect it was the cheapo card reader she used.
The solution is you buy the CF cards you need and a matching set of SDHC cards (Class 10 or faster) and have the camera write to both. It will probably slow things down if you plan to shoot action, but for regular travel photography it should be fine.
I don't recall where you are in Canada, but I recently bought a whack of 16GB Class 10 Transcend SDHC cards from Canada Computers (a chain in Ontario) for $12 each (though I think those were on clearance to be replaced by the new UHS-1 version). Cheap insurance if it's a once in a lifetime trip.
I'd be more worried about camera/lens failure if you don't have suitable back-ups.
p.2 #8 · What size CF card do you use in your Canon 1D Mk IV?
Lars Johnsson wrote:
I did a test with my cards in the 1D4 a couple of weeks ago.
I got a few new cards so I did a new test. My new Transcend cards 400x which are UDMA 7 cards today are a lot faster than the UDMA 6 version of the 400x card. Both Transcend and Sandisk have updated their cards from UDMA 6 to 7 without saying anything. And the new cards that look the same except the 7 or the Video Performance Guarantee (VPG) pic.
It's 30 sec shooting with RAW in my Canon 1D4. All settings are the same of course. But this time I had the lens on MF and also the camera in M settings to get everything exactly the same. I will do the same test with a 1DX when I buy that body.
ISO 100
1/4000 sec
f/5,6
lens EF 24L
Gitzo tripod RRS head
Conclusion: UDMA 7 cards are improved a lot. And there is a huge speed increase when comparing them against the same older card with UDMA 6. Even when the makers have the same speed on the card.
Thanks for this Lars. The one card you didn't have available to test was the Transcend 600x UDMA-6, so I gave it a try using your parameters. Considering the exposure you used, it's at least three stops under what would be normal for full sunlight, so your images must have been pretty dark, so I did the sequence with the body cap on and came up with 122 frames in 30 seconds. Shooting a low detail scene with the 50 1.2L wide open and in focus, dropped it to 107 frames. With the image defocused, 118 frames. Black frames were 16MB, the defocused frames were around 17 and the in focus frames were around 19, so what one photographs (high detail vs. low detail), lens, exposure, ISO... definitely has an influence on card throughput.
If it's not too much trouble to ask, I would be curious how many frames you get until hitting the buffer, and, how many seconds it takes to clear the buffer without shooting any additional frames, with the Transcend 600x UDMA-7 card. Also, if you could make note of the RAW file size, it would give me some correlation to what I just tested.
Aug 15, 2012 at 03:17 PM
Lars Johnsson Offline • • • • • • • Upload & Sell: Off
p.2 #9 · What size CF card do you use in your Canon 1D Mk IV?
Ok Ron, I will try it with the 64GB 600x UDMA 7 card. But it have to wait until the weekend
