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Panasonic 100-400 focal length display on OLympus.

Discussion in 'Native Lenses' started by gary0319, May 16, 2016.

  1. gary0319

    gary0319 Mu-43 Veteran

    Nov 26, 2014
    Sarasota FL
    I've noticed that the focal length display for the 100-400 on my Olympus bodies is strange (at least to me). Zoomed to the 400mm end it reads 400 in the EVF, but back it off just a tad and it immediately drops to 364mm in the EVF. I cannot get any reading between 364mm and 400mm. Also, the exif on my images is either 400mm or 364mm.I'm beginning to wonder if there are no focal length settings between 364 and 400.

    So did I buy a zoom lens without 36mm of the focal lengths or is it just the readout that is faulty. I've tried it on my E-M5 II, my E-M1, and my PL7 with the same results.

    By way of comparison, my Panasonic 100-300 was able to display much smaller focal length increments. I usually shot the 100-300 and 286mm, or 280mm.

    Has anyone else noticed this, or is this just a quirk in the two copies my wife and I have received.
  2. Turbofrog

    Turbofrog Mu-43 Hall of Famer

    Mar 21, 2014
    Does the field of view change at all when you shift between 400mm and 364mm? That is, can you take multiple images that look different even if the EVF reports the same 364mm? That seems like the easiest way to answer your question as to whether it is just a quirk of that body / lens combination.
  3. gary0319

    gary0319 Mu-43 Veteran

    Nov 26, 2014
    Sarasota FL
    Good idea.......
    I hadn't thought of that. I'll do some tests and see what happens.
  4. gary0319

    gary0319 Mu-43 Veteran

    Nov 26, 2014
    Sarasota FL
    After further exploration and checking some of my other lenses, here's my take on this......

    This may just be the design parameters that were built into the lens.

    My OLy 14-150 drops the readout from 150mm>135>120 so maybe each lens has it's own set interval that it displays. If a 15mm interval is for the 150mm (10%) then maybe a 34mm interval at 400 is appropriate.

    At any rate this in no way reflects on the more than stellar shots I'm getting wit this lens compared to my other lenses.

    Thanks again for indulging me......

  5. alex g

    alex g Mu-43 Top Veteran

    Mar 30, 2016
    New York / Bath
    The copy I had for a while showed the same behaviour as yours: wide intervals between declared focal lengths. Physical focal lengths, however, are continuous - as one would expect. Just means that you have to view the declared values as approximations.