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EC-20 and 50-200 SWD

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  • #31
    Re: EC-20 and 50-200 SWD

    Hi,

    My contribution to the detailed inspection...

    I dug out the some bird photos taken the past summer taken in "realistic field conditions" (good light and at quite some distance) showing what I have been able to achieve with the 50-200 SWD + EC20 and the E-620 body.

    Used monopod and IS.1 so any shake blur should be virtually eliminated.

    I picked the sharpest shots from series from focus and motion blur point of view.

    RAW images process in DXO Optics, using the default profile. 50-200 SWD is supported so the optics correction module is applied.

    I have cut out a 1024x768 portion of the photos for 100% scale rendering.


    What do you think about the sharpness?





    #1 Great Egret
    Distance to subject: 70 meters
    ISO 400
    F/9
    1/1000 s
    Comment: slight CA is visible. Focus is correct (not visible on the crop, but visible on the full size picture). Slightly soft.



    #2 Ruddy Turnstone
    Distance: 15 meters
    ISO 400
    F/8
    1/2000 s

    Comment: I should have stepped down further, was not anticipating the subject. Some back focus but not much.



    #3 Sanderling
    Distance: 22 meters
    ISO 400
    F/9
    1/1000 s

    Comment: back focus is noticeable, impacts the sharpness.



    #4 Whinchat
    Distance: 19 meters
    ISO 400
    F/8
    1/200 s

    Comment: 1/200 s should be fast enough with IS.1 and monopod. Hard to judge if focus is right or not, but since there are no other elements in the picture I guess it is right. Slightly soft.


    My Gallery on 500px

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    • #32
      Re: EC-20 and 50-200 SWD

      @Tordan58

      How did you knew the distance to the subject ? Or is just an aproximation ?

      The sharpness is not that bad for 100%, but not usable at 100%. Maybe with resize + sharpen, looks ok.
      50-200 alone produces pictures wich you can use even if you crop at 100%, but sometimes is not long enough.

      I got sharper photos than you when with this combo. I will post tonight some 100% samples.

      I saw now that you have Sigma 50-500. How is it at 100% ? Sharp enough ?
      Worth to use it instead of 50-200 + EC-14 ?
      My gallery: https://www.flickr.com/photos/27603562@N04/

      Comment


      • #33
        Re: EC-20 and 50-200 SWD

        Originally posted by katran View Post
        @Tordan58

        How did you knew the distance to the subject ? Or is just an aproximation ?
        You can read the distance in the EXIF data.

        Originally posted by katran View Post
        @Tordan58
        The sharpness is not that bad for 100%, but not usable at 100%. Maybe with resize + sharpen, looks ok.
        50-200 alone produces pictures wich you can use even if you crop at 100%, but sometimes is not long enough.
        I agree.

        Originally posted by katran View Post
        @Tordan58
        I got sharper photos than you with this combo. I will post tonight some 100% samples.
        Looking fwd to see them. Maybe the E5 makes a difference. Maybe the AF system on the E620 is fooled by the EC20?

        Originally posted by katran View Post
        @Tordan58
        I saw now that you have Sigma 50-500. How is it at 100% ? Sharp enough ?
        Worth to use it instead of 50-200 + EC-14 ?
        It is sharper at 400mm. Sharpness drops as you venture into the long end of the zoom range but still beats my 50-200 + EC20 combo. The drawback is weight. I would pick the Sigma over the 50-200 SWD + EC20 unless restricted by weight restrictions (e.g. flight travel).

        For the record, the 50-200 + EC14 is sharper that the Sigma.


        Regards
        /Tord
        Last edited by Tordan58; 14th January 2013, 09:55 AM. Reason: E5 vs E620

        My Gallery on 500px

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        • #34
          Re: EC-20 and 50-200 SWD

          Originally posted by Tordan58 View Post
          You can read the distance in the EXIF data.
          Are you sure ? As far as I know, this is working only with Sigma lenses.
          With Olympus lenses this information is not available.

          I checked now the exif of my pictures, but I could not find the distance to the subject.
          Can you give more details here ? Wich program you used to read the exif and what is the name of the tag wich contains the distance to the subject.

          Thank you in advance !
          My gallery: https://www.flickr.com/photos/27603562@N04/

          Comment


          • #35
            Re: EC-20 and 50-200 SWD

            Originally posted by katran View Post
            Are you sure ? As far as I know, this is working only with Sigma lenses.
            With Olympus lenses this information is not available.

            I checked now the exif of my pictures, but I could not find the distance to the subject.
            Can you give more details here ? Wich program you used to read the exif and what is the name of the tag wich contains the distance to the subject.

            Thank you in advance !
            Hi,

            The information is in tag 9206 Hex / 37382.
            For instance:
            Tag hex Tag Name Type Value Text value
            9206 37382 ExifSubjectDist 5 18650/1000

            An easy way to inspect the EXIF is using EXIFeditor from Kiwi Software. You can download it from here.

            /Tord

            My Gallery on 500px

            Comment


            • #36
              Re: EC-20 and 50-200 SWD

              This information is gold. You are great. Thank you so much !
              I will try and if I do not have succes to find the info, I will let you know.

              And this evening I will come back with 100% samples made with E-5 + 50-200 + EC-20.

              If you feel yout E-620 + EC20-combo has a focus problem, worths to try live-view mode too. If you notice an sharpness improvment, than it can be that focus does not make a very good job all the time.
              I am sure that in some conditions (especially low light) focus system fails to do a perfect job when using EC20 (maybe because of F/7.0).
              My gallery: https://www.flickr.com/photos/27603562@N04/

              Comment


              • #37
                Re: EC-20 and 50-200 SWD

                Now I tried Exif Editor.

                I opened one of my pictures, but I could not found "9206 37382 ExifSubjectDist".

                I found "9205" and "9207", but could not found "9206".

                What do you think ?

                Maybe only the SWD version can measure the distance.
                My gallery: https://www.flickr.com/photos/27603562@N04/

                Comment


                • #38
                  Re: EC-20 and 50-200 SWD

                  One thing I could do is to calibrate the AF system to check it if there is a systematic bias when using the 50-200/EC20.

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                  • #39
                    Re: EC-20 and 50-200 SWD

                    Ok, but what about my last post ?

                    I tried ExifEditor. Still do not see "9206 37382 ExifSubjectDist".
                    My gallery: https://www.flickr.com/photos/27603562@N04/

                    Comment


                    • #40
                      Re: EC-20 and 50-200 SWD

                      Originally posted by katran View Post
                      Now I tried Exif Editor.

                      I opened one of my pictures, but I could not found "9206 37382 ExifSubjectDist".

                      I found "9205" and "9207", but could not found "9206".

                      What do you think ?

                      Maybe only the SWD version can measure the distance.
                      Hi

                      I checked on a few files, my own as well as some downloaded from the forum. I noticed a few things.
                      • All of the files I have created have this EXIF tag. I have been using E520 and E620/E600 over time.
                      • The tag has a reasonable value when AF lenses have been used. I checked files taken with Zuiko 9-18, 12-60, 50mm, 50-200, 70-300, and also Sigma 50-500
                      • When used with non-AF lenses (e.g. legacy Zuiko 50mm or my telescope) it is present but has a default value 6395/1000, same value for each file. (The value may, or may not, come from the AF confirm dandelion chip I am using, but this does not matter. What matters is that the tag is there and has an arbitrary value).
                      • None of the files I have seen created with the E3 or E5 have this tag.


                      What I guess is that the tag is camera body dependent, and the observations above indicate that it is regardless of lens make and model.

                      Possible explanations?
                      • It could be that the E3/E5 do not support/discard this tag.
                      • It could be that it is supported but is hidden under another name, however none of the E3/E5 tags I found in EXIF Editor resemble "distance", and none of the values are close to what you would expect
                      • It could be that the processing SW that generates JPG discards this tag. Have you checked your RAW files to see if the tag is there?


                      /Tord

                      My Gallery on 500px

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                      • #41
                        Re: EC-20 and 50-200 SWD

                        Thank you again !

                        I also have raw files, but could not find this tag.

                        I have a friend wich is using E-620 + 50-200 SWD + EC-14 and I asked him to send me an picture with exif.
                        I could not found in that picture neither the distance tag.

                        Now I have the feeling that maybe I am looking wrong.
                        Can you post here a printscreen with that tag to see how it looks, because maybe I am looking wrong or in a wrong place ?
                        My gallery: https://www.flickr.com/photos/27603562@N04/

                        Comment


                        • #42
                          Re: EC-20 and 50-200 SWD

                          Here are two screenshots showing how the EXIF in the photo of the Whinchat looks like on my computer: http://e-group.uk.net/gallery/showgallery.php?cat=1550

                          For easy reference below are all the tags exported from the file:
                          Tag hex Tag Name Type Value Text value
                          10E 270 ImageDescription 2 OLYMPUS DIGITAL CAMERA
                          10F 271 EquipMake 2 OLYMPUS IMAGING CORP.
                          110 272 EquipModel 2 E-620
                          112 274 Orientation 3 1 Horizontal (normal)
                          11A 282 XResolution 5 314/1
                          11B 283 YResolution 5 314/1
                          128 296 ResolutionUnit 3 2 inches
                          131 305 SoftwareUsed 2 DXO Optics Pro v6
                          132 306 DateTime 2 2012:09:04 07:35:08
                          829A 33434 ExifExposureTime 5 1/200
                          829D 33437 ExifFNumber 5 80/10
                          8822 34850 ExifExposureProg 3 3 Aperture-priority AE
                          8827 34855 ExifISOSpeed 3 400
                          9000 36864 ExifVer 7 0221
                          9003 36867 ExifDTOrig 2 2012:09:04 07:35:08
                          9004 36868 ExifDTDigitized 2 2012:09:04 07:35:08
                          9204 37380 ExifExposureBias 10 0/10
                          9205 37381 ExifMaxAperture 5 1273/256
                          9206 37382 ExifSubjectDist 5 18650/1000
                          9207 37383 ExifMeteringMode 3 5 Multi-segment
                          9208 37384 ExifLightSource 3 0 Unknown
                          9209 37385 ExifFlash 3 8 On, Did not fire
                          920A 37386 ExifFocalLength 5 400/1
                          927C 37500 ExifMakerNote 7 OLYMPUS

                          My Gallery on 500px

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                          • #43
                            Re: EC-20 and 50-200 SWD

                            PS
                            If you provide me an E5 RAW file I could have a look at it later this evening to see if I find anything that resembles a tag holding distance information. You can email it to me, I will PM you an email address.

                            My Gallery on 500px

                            Comment


                            • #44
                              Re: EC-20 and 50-200 SWD

                              Thanks again for the info !

                              I sent to you to gmail address, an raw file made with E-5 and 50-200.
                              It is only 11 Mb, size should not be a problem for an mailbox.

                              If you have time to have a look....it is not a hurry. When you have time . Thank you in advance !

                              Maybe from now on is better to continue discussing by mail about this subject or maybe to open a new thread about exif-distance-to-subject, to avoid off-topic.
                              It was an very interesting information, thanks to tordan58.

                              Of course, here we will continue with new samples and informations about 50-200 + EC20 combo.
                              My gallery: https://www.flickr.com/photos/27603562@N04/

                              Comment


                              • #45
                                Re: EC-20 and 50-200 SWD

                                I will post now the 100% samples : E-5 + 50-200 mk1 + EC-20.

                                Picture 1 - 400mm, F/9.0
                                Original picture resized to 1600x1200 :


                                And 100% crop :


                                Picture 2 - 400 mm F/9.0
                                Original picture resized to 1600x1200:


                                And 100% crop :


                                Picture 3 - 316mm F/9.0
                                Original picture resized to 1600x1200:


                                And 100% crop :


                                Picture 4 - BIF 316mm, F/9.0
                                Original picture resized to 1600x1200:


                                And 100% crop:
                                My gallery: https://www.flickr.com/photos/27603562@N04/

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