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CF cards speed comparisons
I am using a Viking CF card 256MB. I am told that my card is only 8X,
while other makers offer faster cards. Is this true? Is Viking the slowest card? I once used Sandisk, and Kingston, and thought they were dog slow compared to Viking. John |
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#3
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Hi John,
It also depends very much on the camera, and whether the camera can utilise the high speed throughput of the card. If used with DSLRs, then the speed will be more noticable, but perhaps not so with cheaper compacts. Cheers, Julian ----------- Shuttertalk Forums Member http://www.shuttertalk.com |
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wrote in message om...
I am using a Viking CF card 256MB. I am told that my card is only 8X, while other makers offer faster cards. Is this true? Is Viking the slowest card? I once used Sandisk, and Kingston, and thought they were dog slow compared to Viking. The original Sandisk *is* slow compared to Viking. Try Sandisk's Ultra II. Vrrrooooommmmm. Rick |
#5
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Lexar makes some 80X cards.
On 4 Oct 2004 22:24:56 -0700, ) wrote: I am using a Viking CF card 256MB. I am told that my card is only 8X, while other makers offer faster cards. Is this true? Is Viking the slowest card? I once used Sandisk, and Kingston, and thought they were dog slow compared to Viking. John |
#6
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Lexar's WA (write acceleration) is gimmicky and only works
with certain models of camera. Sandisk's Ultra II is a better bet. Rick "GT40" wrote in message ... Lexar makes some 80X cards. On 4 Oct 2004 22:24:56 -0700, ) wrote: I am using a Viking CF card 256MB. I am told that my card is only 8X, while other makers offer faster cards. Is this true? Is Viking the slowest card? I once used Sandisk, and Kingston, and thought they were dog slow compared to Viking. John |
#7
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Sure, thats why pro's use Lexar cards...
On Tue, 5 Oct 2004 12:13:42 -0700, "Rick" wrote: Lexar's WA (write acceleration) is gimmicky and only works with certain models of camera. Sandisk's Ultra II is a better bet. Rick "GT40" wrote in message ... Lexar makes some 80X cards. On 4 Oct 2004 22:24:56 -0700, ) wrote: I am using a Viking CF card 256MB. I am told that my card is only 8X, while other makers offer faster cards. Is this true? Is Viking the slowest card? I once used Sandisk, and Kingston, and thought they were dog slow compared to Viking. John |
#8
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GT40 wrote:
Sure, thats why pro's use Lexar cards... On Tue, 5 Oct 2004 12:13:42 -0700, "Rick" wrote: Lexar's WA (write acceleration) is gimmicky and only works with certain models of camera. Sandisk's Ultra II is a better bet. Rick "GT40" wrote in message ... Lexar makes some 80X cards. On 4 Oct 2004 22:24:56 -0700, ) wrote: I am using a Viking CF card 256MB. I am told that my card is only 8X, while other makers offer faster cards. Is this true? Is Viking the slowest card? I once used Sandisk, and Kingston, and thought they were dog slow compared to Viking. I have no experience with recent Viking cards, and I hope repeating this month-old data isn't an irritant to those who've already seen it: "I can't speak about SD memory cards, but my experience and experiments with a few CF cards in two cameras (set out below) give me the impression that there is little to choose among newly produced memory cards. It seems to me most of what differences appear depend on the camera. Certain dSLRs have integrated with Lexar's WA speedup technology. Most digital cameras have not. Apart from that, at least one of the more recent, higher-MP cameras seems to have architecture that accommodates whatever potential the card may have. ============================== _I set up my Nikon CP5700 on a tripod, filled the monitor with a view of a CRT showing the Windows Time/Date adjustment facility, so the photograph would include a record, and I could see what was happening in real-and verifiable, if needed-time. Camera saw everything at 1/15 second, f2.8, same view for every exposure. RAW, full-size exposures after format of a CF card in camera. I waited until the on-screen digital counter said xx:00 or xx:30, depending on how long it took me to record data and reformat the card between shots. As soon as the 00 or 30 digits appeared I pushed the shutter release button. The effect of this was that the camera monitor screen went blank at :01 or :31, very consistently. The camera monitor and the CRT were in a sight line, so I could look at the time and still see when the camera recovered a view (screen un-blanked). I recorded that interval for the first few trials, but ceased when it seemed clear the time was the same independent of card type or speed: 8 (eight seconds, approx.). Once the camera monitor acquired a view, I watched the little recording symbol until it disappeared, and recorded the time I saw on the CRT time display. Re-format the CF card, repeat the exposure, three exposures per card, change cards, repeat for each card. Actually I had to repeat a repeat or three, as I nodded off and failed to note the time on a few trials. (more seniorness) These are the cards I used, and their sources: Viking 512MB, two years old, no speed marked on card, Amazon.com SanDisk 512MB #1 plain, one month old, Costco SanDisk 512MB #2 plain, one month old, Costco San Disk 512MB Ultra II, two weeks old, Costco Lexar 512MB 40X #1, eight months old, disremembered online source Lexar 512MB 40X #2, two months old, BandH Lexar 1GB 80X, less than a week old, Adorama These are the times I recorded as elapsed between button-push and symbol-gone. I chose the mode if times were not identical; otherwise, they were consistent (identical) among trials. CP5700 and Viking 512MB 83 seconds SanDisk Plain #1 32 seconds SanDisk Plain #2 39 seconds SanDisk Ultra II 22 seconds Lexar 40X #1 25 seconds Lexar 40X #2 20 seconds Lexar 80X 22 seconds Then, with absolutely the same setup, I used the 8MP, ISO 50 CP8700 and Viking 512MB 23 seconds* SanDisk Plain #1 16 seconds SanDisk Plain #2 17 seconds SanDisk Ultra II 16 seconds Lexar 40X #1 18 seconds Lexar 40X #2 16 seconds Lexar 80X 16 seconds I take this to mean that identically inscribed cards (two SanDisk Plains; two Lexar 40Xs) can be as different one to the other as the differences between comparable but differently branded cards in these cameras; cards perfomed fairly consistently relative to each other, in two different but similar cameras; the remarkable differences are attributable to the camera; the camera can drag a mediocre performer to the level of much more expensive cards (SanDisk Plains' latencies went from 32-39 to 16-17 seconds, an improvement of 200-240%, Viking improved by 360%, and the others were better by 125-140%, camera-to-camera). * First trial with the Viking card in the CP8700 was a mind-blower: it lost the view at shutter-release, reacquired it with the writing symbol on screen, and as near as I could tell, was still writing at five minutes! Then eight minutes. At ten minutes I started pushing buttons, but everything was frozen. I had to remove and reinsert the battery tray to make it come alive again. Reformatted the Viking card (again) and the rest of the trials went as expected, but quite a bit faster. This morning I sat in the waiting room while my car was serviced, and did this: CP8700, 1GB 80X Lexar CF card, ISO 50, 1/125, f7.2, camera propped up and as little disturbed as I could manage, framed a glass doorway with New Car displayed beyond, I took one dozen RAW photos, releasing the shutter as quickly as the camera would allow. I counted down between screen blank and view recovery (about 8 seconds) and looking at EXIF info for actual button-push times. The camera would accept a new photo (shutter release) as soon as the view was reacquired, for the first four photos, even though the writing symbol was displayed. After that, the hourglass buffer-full symbol would display for increasing amounts of time, but never exceeded sixteen seconds after view reacquisition. After the twelfth shutter release, I let it close itself out, and it wrote for about 24 seconds. I take this to mean the CP8700 writes to the 80X Lexar card at 16 seconds per 12,374KB RAW image, and that a user can depend on the camera to allow about four exposures per minute as long as battery and memory hold out. Does that sound right?_" =============================== -- Frank ess |
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Lexar's WA is of no benefit in cameras that cannot take advantage of
their gimmicky WA (e.g. all Canon models). If you read their website you'd know as much: http://www.lexar.com/digfilm/wa_cf.html Rick "GT40" wrote in message ... Sure, thats why pro's use Lexar cards... On Tue, 5 Oct 2004 12:13:42 -0700, "Rick" wrote: Lexar's WA (write acceleration) is gimmicky and only works with certain models of camera. Sandisk's Ultra II is a better bet. Rick "GT40" wrote in message ... Lexar makes some 80X cards. On 4 Oct 2004 22:24:56 -0700, ) wrote: I am using a Viking CF card 256MB. I am told that my card is only 8X, while other makers offer faster cards. Is this true? Is Viking the slowest card? I once used Sandisk, and Kingston, and thought they were dog slow compared to Viking. John |
#10
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It seems Viking makes the slowest cards, but I use CF cards in a handheld PC
palmtop, so I wonder if my HPC even has the ability to fully utilize a 40X CF card. The bus is only 51mhz. The unit is a HP Jornada 720. Its not a PocketPC. John CP5700 and Viking 512MB 83 seconds SanDisk Plain #1 32 seconds SanDisk Plain #2 39 seconds SanDisk Ultra II 22 seconds Lexar 40X #1 25 seconds Lexar 40X #2 20 seconds Lexar 80X 22 seconds Then, with absolutely the same setup, I used the 8MP, ISO 50 CP8700 and Viking 512MB 23 seconds* SanDisk Plain #1 16 seconds SanDisk Plain #2 17 seconds SanDisk Ultra II 16 seconds Lexar 40X #1 18 seconds Lexar 40X #2 16 seconds Lexar 80X 16 seconds ------- America is back from the attack on our homeland, back from the attack on our economy, and back from the attack on our way of life. We are back because of the perseverance, character and leadership of George W. Bush! (Arnold Schwarzenegger, 2004). |
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