On Feb 27, 2006, at 5:59 AM, Rob Studdert wrote:
Yes, they reduce card speed but I find it to be 15-20% with Sandisk
Ultra II cards, not 34%.
Mine must be faulty. I just tested a Sandisk Ultra II SD in the SD
slot of my
card reader and HD Tune 2.10 reported a transfer rate of 6.3MB/s
whereas the
same card in the CF adaptor read in the CF slot of the same reader
tests at
3.7MB/s whereas my bog stock 52x Ridata CF transfers at 4.9MB/s in
the same
slot. So the net speed loss is using my Mittoni adaptor accoring to
HD Tune
41.3%
I had full SD and CF Ultra II 1G cards so I did a couple of timings.
Transferred the same data three times each using a Belkin 8-in-1 USB
2.0 reader attached to an Apple iMac G4 20", Mac OS X v10.4.5:
CF :: 5.9 [EMAIL PROTECTED]
SD :: SD slot 6.4 [EMAIL PROTECTED]
SD :: SD->CF adapter 5.3 [EMAIL PROTECTED]
That is much faster than either the Sony or the Pentax DS can write,
so in the camera there is virtually no discernible difference in
write speed.
This is off topic for the Pentax list, but interesting:
One of the things I find very very curious and have no explanation
for is the Sony's performance with Memory Stick PRO cards. I've
tested the Sony using Sandisk Ultra II CF and SD in CF adapter, and
Memory Stick PRO cards ... all 1G capacity. Write speed in the camera
varies *slightly* in favor of the Memory Stick PRO. However, on
download, the Memory Stick PRO card is shockingly slower than the SD
or CF cards in that same Belkin reader. It barely achieves 0.9
[EMAIL PROTECTED]
I thought this might be due to a bad slot in the reader and happen to
have two other Memory Stick PRO readers ... a Sony MSAC-USC dedicated
reader and a Sony USB 2.0 128M flash drive with Memory Stick PRO
card. So I tested in them as well ... they were even slower!!!
Can't explain this at all (it's why I was doing timings... ;-) but
needless to say I'll buy CF and SD cards rather than Memory Stick PRO
cards.
Godfrey
