Migrating from 35mm FF to m43 Big Glass

Discussion in 'Native Lenses' started by mcasan, Mar 2, 2016.

  1. mcasan

    mcasan Mu-43 All-Pro

    Feb 26, 2014
    Back in the day when the wife were taught to shoot wildlife a good default aperture was F8 as it was usually deep enough to get larger animals in focus especially if the AF point was somewhere on the head. So I used a DOF calculator to calculate the DOF for using a 35mm FF body hooked up to a 600mm lens at aperture F8. I then did a second calculation adding a 1.4TC.

    Then I did a calculation using a m43 body with a 300mm at F4. Compare the DOF to that of the 35mm 600mm lens without a TC. The last calculation adds a 1.4TC to the m43 300m at F4. Compare the DOF to that of the 35mm 600mm lens with a TC.

    Moving from 35mm FF bodies, due to the differences in sensor size, to get the same field of view and depth of field, you need half the focal length on the m43 lens and you need double the size of the aperture (i.e. from F8 to F4).

    Attached Files:

  2. gr6825

    gr6825 Mu-43 Veteran

    Oct 10, 2012
    This shows why M4/3 lenses really need to be good wide open.
    • Like Like x 1
  3. pellicle

    pellicle Mu-43 Hall of Famer

    Feb 10, 2010
    Kiillarney, OzTrailEYa
    Hi and Welcome to the discovery that Oly has been actively selling up for over a decade now (and indeed to a lesser extent Canon / Nikon with their APS models).

    I leapt on m43 when it came out because 43rds just had winky dink optical viewfinders and I was certain I'd be getting focus accuracy issues. When the G1 came out I immediately bought one and my second legacy lens (after a 50mm) was a 300f4


    So I've been soaking up exactly the benefits you're talking about for 6 years now

    Last edited: Mar 2, 2016
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