P/L 100-400 wide open shots ( Sharpness tests )

Discussion in 'Native Lenses' started by Fred S, Apr 19, 2017 at 6:33 PM.

  1. Fred S

    Fred S Mu-43 Top Veteran

    554
    Feb 20, 2012
    Calgary
    Fred S
    I used my EM-10 and P/L 100-400 on a tripod
    EM-10 Vivid shots Sharpening set to 0
    IBIS and OIS OFF SOOC jpg resized for postings

    I really can't see much of a difference 300 to 400 wide open
    and 400 at 8.0 . I also can't see any difference with IBIS ON and OIS OFF
    or IBIS OFF and OIS ON on any of my shots
    So with my scientific test ( LOL ) the 100-400 is plenty sharp wide open to 400mm

    300 f 5.7
    300%20f5.7_zps0bff13yv.

    350 f 5.9

    350%20f5.9_zpsl4owonaz.

    400 f 6.3

    400%20f6.3_zpsdk9tup3r.

    400 f 8.0

    400%20f8_zpsy2ozpfxj.
     
    Last edited: Apr 19, 2017 at 6:41 PM
  2. AussiePhil

    AussiePhil Mu-43 All-Pro

    Jun 1, 2014
    Canberra, ACT, Aust
    Phil
    Yeah I find my copy to be acceptably sharp at full zoom wide open at shorter distances not so sure about the same above 50 to 100m
    As for image stabilisation regards of sensor or lens if it's sitting on a solid tripod the gyroscopic sensors have nothing to detect and therefore will do nothing.
    I just leave is-auto turned on and have lens OIS running on the 100-400 on the EM1mk2 as the system is more responsive
     
  3. Fred S

    Fred S Mu-43 Top Veteran

    554
    Feb 20, 2012
    Calgary
    Fred S
    Don't quote me on this but
    any thing past 100mm you could be dealing with heat waves and air pollution
    on a hot day 50m could be heat waves
    just a thought
     
    • Agree Agree x 1
  4. panamike

    panamike Mu-43 All-Pro Subscribing Member

    Jul 5, 2016
    Lincolnshire UK
    400mm at f6.3 but only about 6 mt away.

    33930459106_239e07f246_o.
     
  5. AussiePhil

    AussiePhil Mu-43 All-Pro

    Jun 1, 2014
    Canberra, ACT, Aust
    Phil
    50-100M is just typical reach on outdoor sporting areas and really won't be affected by air pollution and if it is I don't want to live there, heat waves maybe under certain conditions but not as a rule....
    Now 400M plus you can start to see these things but even out to 3000M it's not common where I live above that all sorts of things come into play.
    I have an image on Flickr shot on the em1 with an old legacy zoom iso4000 and the building 4.5 km away you can see is sharp and clear with little to no atmospheric effects, I must go and shoot it with the 100-400 for comparison