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C1 capture speed 7.1.3 vs 6.4.5 w/ Canon 5D3

Terence Patrick
Was experiencing slowness using C1 v7.1.3 tethered with a Canon 5D3. Previews were taking noticeably longer than v6 to render into anything remotely viewable. So on my off day I setup a test and here's what I found:

Did three rounds of 15 shot bursts on each version of C1. Exposure was ISO 400, 1/250 @ f/2.8. Camera settings were manual auto focus, slow burst mode, RAW only.

Times are the rounded-up averages of the three attempts. Clock started with the first press of shutter and stopped as soon as activity wheel disappeared and last preview was sharp.

6.4.5 = 27 seconds
7.1.3 = 54 seconds

Machine: Macbook Pro Retina - 2.7ghz i7, 16gb ram, 768 SSD (500+ GB free space), Nvidia GeForce 650M 1GB, OSX 10.8.4

Software: C1 6.4.5 & 7.1.3, both fresh installs with defaults left on, OpenCL set to Auto, Preview size 2400px (largest in 6.4.5) & 2560px (7.1.3)

Camera: Canon 5D Mk3 firmware 1.2.1, Canon 35mm f/2 (chosen because C1 doesn't have a lens profile for it, to keep things equal between both versions), Tether Tools 15' tether cable.

Does anyone else experience this difference in speed on set when tethered? What could be happening to make v7 so much slower?
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  • Mark701
    bump, just interested in ANY improvement in speed, my prev exp with 7 was TOO SLOW, and my ONLY choice for tethered acquire is a 2011 (non retina) mbp wth ssd and 8 g mem. is this still unworkable?
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  • Paul Steunebrink
    I do not tether that frequent and much plus that I use CO7 from day-one, that I can objectively (with measurements in seconds…) comment properly.

    However, CO7 has improved in speed in its last few incarnations. There has been a lot of optimisation done along the line.

    Some tips for fast tethering with CO7 from the top of my hat:
    - set the preview cache size (Preferences) to a lower value than default; for example use your screen resolution as reference
    - (optional, cumbersome and pretty unorthodox) use the CO6 engine (Preferences) as the default during tethering; this might put a lower strain on system resources and upgrade the engine from the Base Characteristics tool after the shoot
    - tether with CO6, adjust and process with CO7; you can have both installed on one system, activated with your CO7 license key; don't forget to upgrade the Engine in CO7 after opening the CO6 tethered images
    (suggestion 2 and 3 are basically the same in a different workflow)
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  • Mark701
    As usual, THANKS Paul. It worked and really liked 7.13:)

    Is there ANY reason to update to the latest 7.15, and from 10.8.4 to 10.8.5 Mac OS(shooting tethered with the 5d mk3)?

    This (7.13) seems faster(!) and more stable than the original 7.0.............THANK YOU!
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  • Christian Gruner
    [quote="Mark701" wrote:
    As usual, THANKS Paul. It worked and really liked 7.13:)

    Is there ANY reason to update to the latest 7.15, and from 10.8.4 to 10.8.5 Mac OS(shooting tethered with the 5d mk3)?

    This (7.13) seems faster(!) and more stable than the original 7.0.............THANK YOU!


    Quite a lot has happened under the hood of 7.1.5, so it should be a little faster, and also more stable.
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  • Mark701
    Tkx Christian, i hate to ug from 10.8.4 bc it so stable on 6.45, is 10.8.4 stable on 7.15?
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  • Paul Steunebrink
    [quote="Mark701" wrote:
    Tkx Christian, i hate to ug from 10.8.4 bc it so stable on 6.45, is 10.8.4 stable on 7.15?

    😄 More often people ask whether CO7 is stable on OS X 10.8.x, not the other way round. 😄
    That said, I suggest that when you are already on CO7.x and 10.8.4, you use CO 7.1.5 on 10.8.5.
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