Is your transfer speed to iPad from camera good?

Kiril Karaatanasov

• July 05, 2022 23:55
• Edited

I had a photo shoot today. I took my iPad Pro 12 with m1 and 8gb RAM in the bag with capture one. I use A7r3 that admittedly creates biggish raw files even compressed. The problem I faced is that the import seems to be quite slow. 

I shot around 800 images and run the transfer while driving. For about 10 minutes it transferred merely 70 images. This seems quite slow.

Do other people have observation on import speed? I used the IPad usb-c cable.

I later imported all 800 files to PC again from the camera usb-c and it seemed to have completed within similar 10-15 minutes time window. This suggest 5 to 10 times faster transfer. 

As well on PC I can see my images coming into my catalog and I can review and edit the first images as more are being transferred. I do not have to leave the PC for 15 minutes to just import

I aborted the slow transfer and selected few (~50) thumbnails (very low res). Those transferred pretty fast I.e.5-10 minutes.

getting the thumbnails too is kind of sluggish 

I can try to get more precise measurements and benchmark against an aging PC.

Do others have issues with transfer speed? Any ideas or advise how to speed it up?

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  Kiril Karaatanasov

  • July 06, 2022 17:55
  • Edited

  I did some measurements and it was not as dramatic difference but still iPad import is quite a bit slower.

  Preview generation for 1369 image on a card over the USB-C connection of A7r3

  iPad - 1 minute 20 seconds

  PC - 52 seconds

  Import 127 images 5,08 GB (5 462 906 368 bytes)

  iPad - 4 minutes 12 seconds

  PC - 2 minutes 50 seconds for import and total of 3 minutes 14 seconds to generate all previews

  I am importing to an external HDD making in parallel backup to second HDD on the PC. The HDDs are nothing special 150MB/s write speed at most 4TB HDDs from WD and Seagate. Note that both the camera and disk are connected on the PC USB interface.

  I can try import without backup to fast SSD e.g. 3GB/s and see how that improves the import speed.

  My PC is kind of slow compared to today standards i7 9700K, 32GB RAM and Z390-P motherboard. I tested using the front panel USB 3.1 gen1 ports. The HDDs I suppose are connected to the rear USB 3.1 gen2 ports.

  So yesterday I observed some dismal performance in the car driving and importing simultaneously. Can the driving affect transfer speed on a tablet? Weird.It is nice to see things are not 10 fold slower than PC.

  Still even in the good home conditions no rattling from car I guess the iPad import performance given the M1 integrated infrastructure seems disappointing.

   

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  Kiril Karaatanasov

  • July 08, 2022 21:57
  • Edited

  I did a test with Surface Pro 8 tablet with i7 11th gen Intel CPU. Previews appear near instantaneously after turning on the camera like zero seconds until the first page of images shows up in Capture One 22.

  Full load of the 1369 previews took 45 seconds.

  Import of the same 127 images from above took 1 minutes 45 seconds

  That is more than 2 times faster than the iPad M1 version.

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