On 26 Jun 2004 at 13:33, Nick Clark wrote: > I have a Sandisk 1Gb standard CF card and a Lexar 40x 1Gb CF card. I've just > been testing the relative performance before buying another card, and have found > them to be virtually identical. > > I was testing by firing a full series of 5 shots to fill the buffer, and then > timing how long untill I could take the next shot. In each case it was about 10 > seconds. > > My immediate reaction is that the *istD can't handle cards faster than standard. > Other alternatives are that Sandisk cards are inherently faster than Lexar, > although I'd expect to see some difference giving the different ratings, or that > the whole 40x/66x/80x/etc thing is a big con. > > Anyone else tested different cards in the *istD?
>From a past thread: On 23 Jan 2004 at 9:52, Sylwester Pietrzyk wrote: > The fastest cards on *istD are undeniably Sandisk Ultra II and Extreme. So I > bought Sandisk Ultra II 512 as the one having good price/performance ratio. > Lexars despite having utilised by *istD Write Acceleration feature, are much > slower and more expensive than those which were faster... See results of tests > here: http://www.robgalbraith.com/bins/multi_page.asp?cid=6007-6432 I just tested my CF cards for RAW write performance using the criterion set at the Rob Galbraith page (http://www.robgalbraith.com/bins/multi_page.asp?cid=6007-6432) and found that my new Ridata 2GB 52x Pro cards deliver 1758kB/s which puts them just slightly behind the Sandisk Ultra II and Extreme in his table. My old 512MB CF cards were spec'd at 20x and came in at 1566kB/s. I'd be interested to see what difference if any the new Write Acceleration technology might make. What it boils down to is that if you need to engage in continuous shooting in RAW past the 5 image buffer you'll be looking at about 7seconds at the very least between subsequent images even using the fastest CF cards. If you need to keep the buffer empty you need to shoot JPEG. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
