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4/3 Lens's On M4/3

Discussion in 'Adapted Lenses' started by Hayden, Nov 22, 2012.

  1. Hayden

    Hayden New to Mu-43

    Nov 15, 2012
    New to the M4/3 World and considering purchasing an OMD. I believe i have decided on using an adapter on an OLY 14-54. Its a hard decision to go with the larger size or the kit lens, but i think i really need the performance of the nicer lens.

    To the main question ---

    When you use a full frame lens on a crop sensor (APSC) body the lens is multiplied by the crop factor. When using a 4/3 Lens on a M4/3 Body is there any crop factor? Is 4/3 the same sensor size as M4/3?

    If i buy the 12-50 kit. The effective 35mm range is 22-100. Is the same true for the 14-54 i.e 28-1058?

    Thanks for your help. Any opinions on if the 14-54 is worth the added size and weight would be appreciated.

  2. Jonathan F/2

    Jonathan F/2 Mu-43 Hall of Famer

    Aug 10, 2011
    Los Angeles, USA
    No crop factor. :smile:
  3. Zariell

    Zariell Mu-43 Top Veteran

    Sep 28, 2012
    Bountiful, UT
    The crop factor is the same, so it would be 2x on any lens you put on it, a side note though is that the 4/3 lenses, tend to focus much slower and less accurately than if you have a M4/3 lens attached, I owned a 35-100 2.0 and it was so slow I just gave up and got rid of the lens, in some cases it took two seconds to focus.

    Hope that helps.
  4. ajamils

    ajamils Mu-43 Veteran

    Nov 20, 2012
    Richmond, Texas
    Different 3/4 lenses behave differently on m4/3 bodies. I have Olympus 14-54 mark II and I have used it on GH1, Gh2 and OMD. It was slow as turtle on Gh1 but on GH2 and OMD it focuses perfectly. Maybe slightly slower than native lenses but completely useable.

    Sent from my GT-N7000 using Tapatalk 2
  5. Zariell

    Zariell Mu-43 Top Veteran

    Sep 28, 2012
    Bountiful, UT
    True a lens that focuses slower is usable, however it might be a deal breaker if you wanting the autofocus speed of a M43, I think it's something to be prepared for if you are going that route rather than it being a surprise. I love full disclosure ;) 
  6. svtquattro

    svtquattro Mu-43 Veteran

    Sep 24, 2012
    Vancouver, Canada
    14-54 II on E-PM2 is very acceptable. When the light is low, is focuses faster than an older PDAF system (E-620). I have not had any AF misses, except when the focus box was too large.
  7. hkpzee

    hkpzee Mu-43 All-Pro

    Sep 5, 2011
    Hong Kong
    Do note that only the Zuiko 14-54 Mk II is CDAF-optimized, so that the focusing speed is slow, but acceptable. The older version of the Zuiko 14-54 would focus even slower...
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