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Thread: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    As the E-M1.1 or E-M1.2 doesn't have a separate AF sensor, obviously misalignment cannot be the reason for Olympus to provide for "Focal location adjustment for phase-difference AF" that "can be fine tuned within a range of 20 steps.", quoting from page 112 of the "E-M1 Mark II Instruction Manual". So we have to look for another explanation. This thread
    https://www.dpreview.com/forums/thre...-post-52156580
    offers some intriguing points, namely, quote:


    "While you are right that in the case of the E-M1 that the camera should not give rise to any back/front focus error the lens can also be a source of error.


    The PDAF sensor system determines the amount and the direction that the lens needs to move and then tells it to go there. Once the lens has made its focus change the PDAF system then makes another assessment and if the result is within tolerance the focus is considered set. With fast aperture lenses the tolerance allowed by the focus system can result in a small focus error that would not be seen using a slower lens being masked by the greater DOF.


    Olympus could reduce the tolerance now that the camera is no longer a source of error but that would result in the focus system taking a second stab at achieving focus. The result would be slower and more jittery focusing with such lenses. Fine tuning allow for any lens errors to be compensated for so that the PDAF can achieve accurate focus at the first attempt most of the time."


    "Focus adjust does work with m4/3 lenses, but only in c-af mode where the PDAF system is being used. Focus adjust has no effect on m4/3 lenses in s-af."


    The E-M1.2 also features in "Menu/A1" an "AF Scanner" that in my camera is set to mode2. Page 111 of the manual explains:


    "Sets the AF scan function* for when the camera cannot
    focus on the subject or the contrast is not clear.
    * Scans whole range from minimum range to infinity for
    focus point when the camera cannot focus on the subject
    or the contrast is not clear.
    [mode1]: AF Scanner is not activated.
    [mode2]: AF Scanner is activated once only.
    [mode3]: AF Scanner is activated."


    I wonder what happens when mode3 is chosen. Dunno as I have not experimented with that option.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    "Focus adjust does work with m4/3 lenses, but only in c-af mode where the PDAF system is being used. Focus adjust has no effect on m4/3 lenses in s-af."
    Hi there K-H,

    Without going into details now, it seems a bit of an odd statement. Have to check my 300/4 and 150/2 again with both S-AF en C-AF ...
    Wonder what your findings are.

    Kind regards.
    Bart ...
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by Knorp View Post
    Hi there K-H,
    Without going into details now, it seems a bit of an odd statement. Have to check my 300/4 and 150/2 again with both S-AF en C-AF ...
    Wonder what your findings are.

    Kind regards.

    Thanks Bart, Sorry, but the following is correct for my E-M1 Mark II:

    • "Focus adjust does work with m4/3 lenses, but only in C-AF mode where the PDAF system is being used."
    • "Focus adjust has no effect on m4/3 lenses in S-AF."

    Very easy to verify with E-M1.2 and mFT 300/4.0 PRO.
    Set AFMA=-10 or +10, shoot with C-AF image OOF, shoot with S-AF image in focus, same as with AFMA=0.
    BTW shoot AFMA=0 with both S-AF and C-AF gives in focus images and an easy way to see how Olympus defines in focus.

    I find this reassuring as Sony's native FE lenses cannot be AFMAed but their adapted A-mount lenses can IIRC.

    One more thing, switching IBIS off greatly aids precise focusing under 14x magnification. If IBIS is on focus point floats.

    For my FT 300/2.8 SHG lens both C-AF and S-AF are affected by the AFMA setting.
    Last edited by k-hawinkler; 11th April 2017 at 01:39.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    It looks like we might get some apples this year.



    E-M1.2 + big tuna 300/2.8 SHG. Nice bokeh, no? https://www.dpreview.com/videos/8056...4010_132618830
    Sort of looks 3-D to me.
    Last edited by k-hawinkler; 11th April 2017 at 12:52.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    CP+ 2017: Olympus interview: 'We chose to be bold'
    https://www.dpreview.com/interviews/...0_dpr_nl_254_8


    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    So I went through the relatively time consuming process of AutoFocusMicroAdjustment (AFMA) for my four Olympus FT lenses on my E-M1.2. Here are the AFMA corrections I settled on for now by shooting markings on an oblique plane. I used Tim Jackson's autofocus test chart.
    http://www.kscameraclub.org/docs/pdf...art_edited.pdf


    • HG . 50-200/2.8-3.5 SWD: AFMA = -2
    • SHG 90-250/2.8: @250m . AFMA = -3 z(oom) tuna <-- I just made that up!
    • SHG 150/2.0: ................. AFMA = -2 little tuna
    • SHG 300/2.8: ................. AFMA = -3 big tuna


    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    All your Tunas seem to be a little 'far sighted' ...
    Bart ...
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by Knorp View Post
    All your Tunas seem to be a little 'far sighted' ...
    Thanks Bart. 'far sighted'? I like the ring of that, as looking into the future!
    So let's look at images to get a better understanding of the effects we are talking about here.
    As a baseline here is an image taken with the mFT 300/4.0 PRO and S-AF that cannot be adjusted, so according to Olympus is spot on focus.
    I had the chart standing on its head (to get more light) when I took the image, so the upper part is far and the lower part is near.
    Using C-AF with AFMA=0 gives the same result.



    E-M1.2 + 300/4.0 @ f/4.
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Here the chart was put upside up. Top of image is far, bottom is near.

    AFMA=0


    AFMA=-3


    E-M1.2 + 300/2.8 @ f/2.8
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    So Bart, could you please show the images how you ended up with AFMA=-3 for 300/4 PRO and AFMA=-8 for little tuna? TIA

    Here are my charts for little tuna. AFMA=-1 is not enough correction , AFMA=-3 is too much , so AFMA=-2 is my best guess.

    AFMA=0


    AFMA=-2


    E-M1.2 + 150/2.0 @ f/2.
    Last edited by k-hawinkler; 12th April 2017 at 23:55.
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by k-hawinkler View Post
    CP+ 2017: Olympus interview: 'We chose to be bold'
    https://www.dpreview.com/interviews/...0_dpr_nl_254_8

    There's also an earlier teleconference turned into an interview with Olympus on what firmware enhancements they are working on for the M1.2. Autofocus enhancements, mostly, but I noticed that they want to allow Auto ISO to work when in manual aperture and shutter mode and shooting video. That's on my request list. Journalists seem very interested in whether video customers are a target for Olympus and Olympus seems anxious to say "not yet." So their list does not include a log profile for video. (compression to help with dynamic range -- Panasonic does this very well, and so does even Leica SL.)

    scott
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Thanks Scott for pointing out those items.
    Nevertheless I am impressed by the C4K 24p 4096x2160 17:9 videos of my E-M1.2.

    Also after sending in my fast Lexar memory cards for a firmware update they have been working without problems in both the E-M1.2 and E-M5.2 for stills and videos.
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    ZUIKO 150mm f/2.0 @2.8

    AFMA = 0


    AFMA = -8


    One could argue -7 is perhaps closer, but I like it better a little 'upfront' .
    Bart ...
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Many thanks Bart. I am amazed.
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by k-hawinkler View Post
    Many thanks Bart. I am amazed.
    Amazed ? Why's that, K-H ?

    Bart ...
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by Knorp View Post
    Amazed ? Why's that, K-H ?

    Thanks Bart. Oh, nothing to worry about.
    Well I am simply amazed that the lens requires such a relatively large correction.
    However I am new to FT lenses and eager to learn more about them, but have only a few data points to go by.
    There only seem to be very few folks, you and me here at getdpi, and a couple others over at FM that actively use them, maybe a few individuals at DPR. I wonder if other users could chime in with their experiences with those Olympus FT tele lenses. The E-M1.2 certainly makes them shine and worth having IMHO.
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    The only FourThirds lens that I continue to use is the 11-22. Does it require these AF corrections?

    scott (M1.2 on its way, but I won't get it for 6 weeks or so. I was thinking of having it meet me in Boston after I fly there using the "dangerous, Islamic airline, Turkish Air".)
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Thanks Scott. You could use an E-M1 and find out.
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Shooting my little tuna at Dusk with AutoFocusMicroAdjustment of -2.

    Apple Blossoms @ f/2


    My first Hummingbird of the Season @ f/2.2


    Moth feeding on Flowering Quincy @ f/2


    E-M1.2 + little tuna 150/2.0 SHG
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    While I find the 2/150 images in this thread beautiful, they do not come close IMHO to the 4/300 images. Obviously 10+ years of optical development make a huge difference

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    ' United ', I would guess, would be safer and offer much better customer care. I wouldn't know. Never boarded cattle wagons.

    p.s. Not forgetting the ' Friendly Skies '. For those who remember

    Quote Originally Posted by scott kirkpatrick View Post
    ...

    scott (M1.2 on its way, but I won't get it for 6 weeks or so. I was thinking of having it meet me in Boston after I fly there using the "dangerous, Islamic airline, Turkish Air".)
    Last edited by rayyan; 15th April 2017 at 03:44.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by ptomsu View Post
    While I find the 2/150 images in this thread beautiful, they do not come close IMHO to the 4/300 images. Obviously 10+ years of optical development make a huge difference
    Oh, an apples and oranges comparison, no?
    With best regards, K-H.

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    A drooling slobbering Hummingbird - the sugar water running down its beak! It must have seen my photo gear!



    E-M1.2 + little tuna 150/2.0 SHG @ ISO 640, f/3.5, 1/1000 s.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by k-hawinkler View Post
    Oh, an apples and oranges comparison, no?
    Why?

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Raven



    E-M1.2 + little tuna 150/2.0 SHG @ f/2.8.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by rayyan View Post
    ' United ', I would guess, would be safer and offer much better customer care. I wouldn't know. Never boarded cattle wagons.

    p.s. Not forgetting the ' Friendly Skies '. For those who remember
    I fly a lot, mostly United, but also its partners. Among those, Lufthansa and Turkish stand out for having the nicest lounges. The one in Istanbul is the best I have been in. United domestic is the least friendly of the Star Alliance trips that I take. United overseas is usually quite pleasant.

    scott

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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Apple Blossoms - Happy Easter



    E-M1.2 + little tuna 150/2.0 SHG @ f/4.5.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities



    E-M1.2 + m4/3 to 4/3 Adapter MMF-3 + 1.4x Tele Converter EC-14 + big tuna 300/2.8 SHG @ 425 mm, ISO 500, f/5.6, 1/1000 s.


    Frankly I am a bit surprised (blown away is more like it) by the high IQ and tremendous sharpness of this image - considering an 1.4x tele converter was used.
    This behavior is reminiscent of using a Leica APO-Extender-R 1.4x on the APO-Telyt-R 280/4 lens.
    I think my EC-14, that arrived today, is a keeper as well.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Well there is big tuna 300/2.8 and little tuna 150/2.0 and another one.
    It has the size and weight of big tuna. I call the 90-250/2.8 z(oom) tuna.
    Here are a few shots with zoom tuna, displayed at half resolution.


    Los Alamos Neutron Beam Cooling Towers.

    E-M1.2 + z tuna 90-250/2.8 @ 90mm



    E-M1.2 + z tuna 90-250/2.8 @ 250mm


    Los Alamos Trails Map.

    E-M1.2 + z tuna 90-250/2.8 @ 250mm
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    The same Turkey Vulture Roost as seen from different heights.


    E-M5.2 + 300/4.0 PRO @ f/4


    E-M1.2 + zoom tuna 90-250/2.8 @ 114mm, f/2.8


    E-M1.2 + little tuna 150/2.0 @ f/2


    E-M1.2 + 75-300/4.8-6.7 II @ 75mm, f/6.3
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by k-hawinkler View Post
    The same Turkey Vulture Roost as seen from different heights.
    E-M5.2 + 300/4.0 PRO @ f/4
    E-M1.2 + zoom tuna 90-250/2.8 @ 114mm, f/2.8
    E-M1.2 + little tuna 150/2.0 @ f/2
    E-M1.2 + 75-300/4.8-6.7 II @ 75mm, f/6.3
    That's an awful lot of glass to carry around in your backpack, K-H ...
    Tell me - you took the pick-up, right ?
    Bart ...
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by Knorp View Post
    That's an awful lot of glass to carry around in your backpack, K-H ...
    Tell me - you took the pick-up, right ?
    Thanks Bart, you are really too funny!

    I could have taken my 1 ton F350 4WD Ford pickup truck that has a 7.5 liter engine and extra cooling to pull extra heavy loads in 4 wheel drive low - but instead all I needed was my Toyota Corolla. BTW, one can drive up to and park right next to the TuVu roost tree. It's about 15 maybe 20 yards from the Visitor Center. Most visitors will never know the vultures are there as the visitors leave when there is still daylight and the vultures return to the roost only for the night!

    You will have noticed the images were taken at different days, 3 with E-M1.2 by me and the one with the E-M5.2 by my son. Typically I only have one camera and one lens with me. When messing around with camera gear it's easy to miss the proceedings around the roost. Also the roost tree is just about a 15 minute drive from my house. So, it's easy for me to get to in the evening if I feel like it.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    April 29, almost May Snow.
    It started snowing between 5 and 6 AM this morning.
    At around 9 AM it looked like this. The view from our Family Room.



    E-M1.2 + 7-14/2.8 PRO @ 7mm
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Robin Wong, With A Heavy Heart, I Have Left Olympus
    https://robinwong.blogspot.my/2017/0...t-olympus.html
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities



    E-M1.2 + zoom tuna 90-250/2.8 @ 180 mm, ISO 800, f/2.8, 1/1000 s.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    I like the fine detail in the foreground trees.



    E-M1.2 + zoom tuna 90-250/2.8 @ 90 mm, ISO 3200, f/2.8, 1/1000 s.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    The one and only Tulip in our backyard! Comes back year after year!



    E-M1.2 + MMF-3 + EC-14 + 300/2.8 SHG @ 425 mm, ISO 1600, f/4, 1/2000 s. But I like the image.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Ruby-throated Hummingbird


    E-M1.2 + MMF-3 + EC-14 + 300/2.8 SHG @ 425 mm, ISO 250, f/4, 1/2000 s
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities





    E-M1.2 + zoom tuna 90-250/2.8 @ 250 mm, ISO 800, f/2.8, 1/2000 s.
    Last edited by k-hawinkler; 2nd May 2017 at 19:10.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by k-hawinkler View Post
    The one and only Tulip in our backyard! Comes back year after year!

    E-M1.2 + MMF-3 + EC-14 + 300/2.8 SHG @ 425 mm, ISO 1600, f/4, 1/2000 s. But I like the image.
    K-H, really ....
    This is like shooting a mosquito with an elephant gun ...
    Bart ...
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by Knorp View Post
    K-H, really ....
    This is like shooting a mosquito with an elephant gun ...
    Well Bart, the best camera is the one that you have with you!
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities



    E-M1.2 + MMF-3 + EC-20 + big tuna 300/2.8 SHG @ 600 mm, ISO 1250, f/8, 1/2000 s.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities



    E-M1.2 + MMF-3 + EC-20 + big tuna 300/2.8 SHG @ 600 mm, ISO 6400, f/8, 1/2000 s, un-cropped, quarter-size linear resolution.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Rolling Silent Shutter Hummingbird Salute!



    E-M1.2 + 300/4 PRO @ ISO 5000, f/5.6, 1/2000 s.

    The fast moving tip of the Hummer's left wing must have been readout from the sensor at the same downward speed.
    In other words, as the image of the wing tip moved downwards in the sensor from row to row, this very same sensor row was readout by the rolling silent shutter, no?

    Will the Sony A9 do any better?
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Curve-Billed Thrasher



    E-M1.2 + Olympus ZUIKO DIGITAL ED 50-200mm 1:2.8-3.5 SWD @ 200 mm.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    I have the zuiko 50-200 non swd (got it for a superb bargain price ) and is works brilliantly on my e-m1 mk2. Wonder how much difference in performance between the swd and non swd
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Quote Originally Posted by mazor View Post
    I have the zuiko 50-200 non swd (got it for a superb bargain price ) and is works brilliantly on my e-m1 mk2. Wonder how much difference in performance between the swd and non swd
    Thanks razor. Please show us some images taken with your combination. With regards to your question, I have no idea.
    Here is another image taken with my lens.



    E-M1.2 + Olympus ZUIKO DIGITAL ED 50-200mm 1:2.8-3.5 SWD @ 200 mm.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities



    E-M1.2 + 150/2.0 @ f/2.8.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Black-Headed Grosbeak



    E-M1.2 + MC-14 + 300/4.0 PRO @ 420mm.
    Last edited by k-hawinkler; 21st May 2017 at 15:01.
    With best regards, K-H.
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    Re: E-M1, E-M5, E-M5.2, etc. ... Peculiarities

    Western Tanager



    E-M5.2 (sic) + 300/4.0 PRO @ 300mm.
    With best regards, K-H.

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