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12-03-2007, 04:02 AM   #1
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K10D: USB Transport modes; PC-F?? (Slow import in Lightroom)

Hi all,

I find that importing (raw) images into Lightroom has become slower. It might be due to Panter / Leopard (yes, I have a Mac) issues, but it got me looking into the K10D menu again.

There I could choose between Pict Bridge, PC and PC-F.

Anyone an idea what the PC-F mode is? The manual only mentions that it exists, and should be used if connection fails, and google-ing only gave me one person suggesting it is Full speed (instead of the USB 2.0 High speed) so basically a 1.1 fallback..

Does anyone know for sure?

And of course; if you know how I can speed up my Lightroom import that would be nice, a full 2GB card takes several minutes to empty. If I understood correctly USB 2.0 gives a speed of 480 Mbps, which should be about 60 MBps. 4 GB should the take around 70 sec, not 5 min +?

12-03-2007, 04:20 AM   #2
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4GB in 5min is 13.6MB/sec average. That is a pretty fast transfer speed reading from the camera. What speed/type of SD card do you have?

A quality USB 2.0 SD card reader will be faster than from camera usb.
12-03-2007, 05:16 AM   #3
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Hi Gregory. I have a SanDisk Extreme III. It claims a minimum 20 MBps sequential read/write (ok, according to their own tests...). Since I thought the K10D supported high speed connections I was hoping to see speeds in that range.. Maybe I was too optimistic...

OTOH, you have a point that it could be much, much slower

Ahwell, I guess I'm a product of my era, speed, speed, speed...

Last edited by fishy; 12-04-2007 at 01:58 AM. Reason: typo
12-03-2007, 04:45 PM   #4
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QuoteOriginally posted by fishy Quote
Hi all,

I find that importing (raw) images into Lightroom has become slower. It might be due to Panter / Leopard (yes, I have a Mac) issues, but it got me looking into the K10D menu again.

There I could choose between Pict Bridge, PC and PC-F.

Anyone an idea what the PC-F mode is? The manual only mentions that it exists, and should be used if connection fails, and google-ing only gave me one person suggesting it is Full speed (instead of the USB 2.0 High speed) so basically a 1.1 fallback..

Does anyone know for sure?

And of course; if you know how I can speed up my Lightroom import that would be nice, a full 2GB card takes several minutes to empty. If I understood correctly USB 2.0 gives a speed of 480 Mbps, which should be about 60 MBps. 4 GB should the take around 70 sec, not 5 min +?
PC-F is USB 1.0. Use PC. The -F is there for computers that have trouble with the cards and need a slower read.

I find that taking the card out of the camera and using a 2.0 card reader speeds up the import quite a bit. Much faster than direct from camera.

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