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Thread: Question regarding E-P1 auto ISO

  1. #1
    Senior Member Amin's Avatar
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    Question regarding E-P1 auto ISO

    How does auto ISO work with manual focus lenses and various modes on the E-P1? On my GH1, using the adapted Nokton 50/1.5, auto ISO works in P mode but not S or M mode. This is inconvenient, because P mode always gives me 1/30s in limited light, and often I need faster than that (more because of subject movement than hand shake).
    -Amin Sabet

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    Senior Member kevinparis's Avatar
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    Re: Question regarding E-P1 auto ISO

    hi

    just did a quick test on A mode with a manual lens - Auto iso seemed to work

    K

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    Senior Member Amin's Avatar
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    Re: Question regarding E-P1 auto ISO

    Thanks Kevin. Could you try S mode for me? Set the shutter speed to 1/100s and see if auto ISO still works?

    If so, I'll be looking for an E-P2 to pair with manual focus lenses!
    -Amin Sabet

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    Senior Member kevinparis's Avatar
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    Re: Question regarding E-P1 auto ISO

    Yup works in S mode too

    K

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    Re: Question regarding E-P1 auto ISO

    Amin on the E-P1 auto ISO works in Manual mode. Not sure why you would use S mode with a manual lens vs. M as the S really doesn't do anything when the camera can't control the Aperture.

    Auto ISO is something that Panny needs to fix in firmware. With fast wide lenses or manual lenses the 1/focal or 1/30 rule just isn't working well enough for people. They should also enable it for manual mode. There has been some noise online about this. Would love a good way to get the feedback to Panny.

    I'm not quite sure what the algorithm is for Oly on how it "decides" to raise the ISO. Does anyone know the answer?

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    Senior Member Amin's Avatar
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    Re: Question regarding E-P1 auto ISO

    Thanks Kevin and Terry! Seems like the E-P2 with EVF will be the ultimate MFT camera for manual focus lenses. For now, we have to choose between EVF and stabilization/auto ISO.

    Quote Originally Posted by TEBnewyork View Post
    Amin on the E-P1 auto ISO works in Manual mode. Not sure why you would use S mode with a manual lens vs. M as the S really doesn't do anything when the camera can't control the Aperture.
    Right, S or M is what I meant. Either would work for me since they do the same thing with manual focus lenses.

    Quote Originally Posted by TEBnewyork View Post
    Auto ISO is something that Panny needs to fix in firmware. With fast wide lenses or manual lenses the 1/focal or 1/30 rule just isn't working well enough for people. They should also enable it for manual mode. There has been some noise online about this. Would love a good way to get the feedback to Panny.
    I never minded it until I started using a manual focus lens.

    Quote Originally Posted by TEBnewyork View Post
    I'm not quite sure what the algorithm is for Oly on how it "decides" to raise the ISO. Does anyone know the answer?
    I'd be interested to learn this as well!
    -Amin Sabet

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