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EX-25 cannot be used in multiples

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  • EX-25 cannot be used in multiples

    Why do companies like Olympus do strange things like preventing more than one EX-25 together.

    I can use 4 cheap auto tubes plus a MMF3 and one EX-25 no problems.
    I cannot use the MMF3 and two EX-25's together and the manual states this is case.

    Why do this?
    OMD E-M1 OMD E-M5II MMF3 12-40 pro 12-50 EZ 14-42 EZ 9-18 f4.0 -5.6 40 -150f4-f5.6 R 60mm f2.8 macro Sigma 105 f2.8 macro Holga 60mm plastic Holga pinhole lens lens and a XZ-1 Olympus - 35 SP Trip 35 Pen EEs OM2sp

    I nice view does not mean a good photograph. My FLickr


  • #2
    Re: EX-25 cannot be used in multiples

    Also why does it need firmware and electronic circuitry.
    The firmware was updated to 1.1.


    Sent from my SM-G930F using Tapatalk
    OMD E-M1 OMD E-M5II MMF3 12-40 pro 12-50 EZ 14-42 EZ 9-18 f4.0 -5.6 40 -150f4-f5.6 R 60mm f2.8 macro Sigma 105 f2.8 macro Holga 60mm plastic Holga pinhole lens lens and a XZ-1 Olympus - 35 SP Trip 35 Pen EEs OM2sp

    I nice view does not mean a good photograph. My FLickr

    Comment


    • #3
      Re: EX-25 cannot be used in multiples

      Originally posted by alfbranch View Post
      Also why does it need firmware and electronic circuitry.
      The firmware was updated to 1.1.
      The circuitry so that the lens can communicate with the body, the firmware so they can communicate better presumably.

      I seem to remember someone one coming up with a workaround in the past but IIRC it involved some rewiring.

      You can't stack the EC tele-converters or even the EX-25 with one of the TCs if you want AF. I'm not sure if you can use the focus by wire when any of them are stacked.
      It's the image that's important, not the tools used to make it.

      David M's Photoblog

      Comment


      • #4
        Re: EX-25 cannot be used in multiples

        AF I can manage without but aperture control I want.

        Rewiring is an option I was considering.


        Sent from my SM-G930F using Tapatalk
        OMD E-M1 OMD E-M5II MMF3 12-40 pro 12-50 EZ 14-42 EZ 9-18 f4.0 -5.6 40 -150f4-f5.6 R 60mm f2.8 macro Sigma 105 f2.8 macro Holga 60mm plastic Holga pinhole lens lens and a XZ-1 Olympus - 35 SP Trip 35 Pen EEs OM2sp

        I nice view does not mean a good photograph. My FLickr

        Comment


        • #5
          Re: EX-25 cannot be used in multiples

          I can remember Jens Birch doing a job on one several years ago, where he halved one and joined the bits together with OM mounts. I got as far as buying a spare EX-25, but never got round to starting the project.
          Go to his web site then Browse-Technical Stuff-Gear-Page 2/3 for a few photos of it.
          Do explore the rest of his site while you're there.

          It also opens the possibility of using the Olympus OM 65-116 variable extension tube if you have one from film days.
          Best Regards
          Bill

          The nearest I have to a home page.
          http://www.flickr.com/photos/peak4/
          They're Watching You!

          Comment


          • #6
            Re: EX-25 cannot be used in multiples

            Originally posted by peak4 View Post
            I can remember Jens Birch doing a job on one several years ago, where he halved one and joined the bits together with OM mounts. I got as far as buying a spare EX-25, but never got round to starting the project.
            Go to his web site then Browse-Technical Stuff-Gear-Page 2/3 for a few photos of it.
            Do explore the rest of his site while you're there.

            It also opens the possibility of using the Olympus OM 65-116 variable extension tube if you have one from film days.
            I do not want to use OM kit as such if I did I would get a MF2-OM and 65-116 and OM 80mm

            Here is the EX-25 modified

            https://jensbirch.smugmug.com/Photog...ar/i-jG3cRHr/A

            https://jensbirch.smugmug.com/Photog...ar/i-v5H3wbw/A
            OMD E-M1 OMD E-M5II MMF3 12-40 pro 12-50 EZ 14-42 EZ 9-18 f4.0 -5.6 40 -150f4-f5.6 R 60mm f2.8 macro Sigma 105 f2.8 macro Holga 60mm plastic Holga pinhole lens lens and a XZ-1 Olympus - 35 SP Trip 35 Pen EEs OM2sp

            I nice view does not mean a good photograph. My FLickr

            Comment


            • #7
              Re: EX-25 cannot be used in multiples

              Alf what are you trying to achieve by doing this?
              http://www.flickr.com/photos/flip_photo_flickr/

              Comment


              • #8
                Re: EX-25 cannot be used in multiples

                Originally posted by peak4 View Post
                I can remember Jens Birch doing a job on one several years ago, where he halved one and joined the bits together with OM mounts. I got as far as buying a spare EX-25, but never got round to starting the project.
                Go to his web site then Browse-Technical Stuff-Gear-Page 2/3 for a few photos of it.
                Do explore the rest of his site while you're there.

                It also opens the possibility of using the Olympus OM 65-116 variable extension tube if you have one from film days.
                Thanks Bill, I think that's what I remember.

                Alf, I think the OM mounts.are a way to connect the extension tubes together. There's plenty out there with the OM system being so popular for macro work.
                It's the image that's important, not the tools used to make it.

                David M's Photoblog

                Comment


                • #9
                  Re: EX-25 cannot be used in multiples

                  Originally posted by David M View Post
                  Thanks Bill, I think that's what I remember.

                  Alf, I think the OM mounts.are a way to connect the extension tubes together. There's plenty out there with the OM system being so popular for macro work.
                  I remember there was someone else on, what was before admin moved to Australia, the US 4/3s forum who made what he called an EX-40, which also bypassed the contacts, but I don't recall the details.

                  It's not just about extension tubes of course, telescopic or otherwise, it also enables bellows with a 4/3s lens.
                  The other thing I'd thought of at the time, was to add a shorting switch to the EX25's ribbon cable, to bypass the electronics completely so it could be used at the same time as a teleconverter.

                  This was one of Jens' original posts; http://forum.fourthirdsphoto.com/thr...ight=extension
                  Best Regards
                  Bill

                  The nearest I have to a home page.
                  http://www.flickr.com/photos/peak4/
                  They're Watching You!

                  Comment


                  • #10
                    Re: EX-25 cannot be used in multiples

                    It's an interesting exercise but with a case full of OM macro equipment not something I would spend time on. IIRC it was Jens who made a shift adapter to use the Tamron 17mm on 4/3.

                    I was surprised how well the Tamron 17mm works on 4/3 considering I didn't do my usual trick of fitting an appropriate hood. Mainly because coming up with a 35mm hood to fit the front of the 17mm was to much effort.
                    It's the image that's important, not the tools used to make it.

                    David M's Photoblog

                    Comment


                    • #11
                      Re: EX-25 cannot be used in multiples

                      Originally posted by David M View Post
                      It's an interesting exercise but with a case full of OM macro equipment not something I would spend time on. IIRC it was Jens who made a shift adapter to use the Tamron 17mm on 4/3.

                      I was surprised how well the Tamron 17mm works on 4/3 considering I didn't do my usual trick of fitting an appropriate hood. Mainly because coming up with a 35mm hood to fit the front of the 17mm was to much effort.
                      It was yes, using microscope slides, as I recall.
                      I did look into it at the time, but never did find a 17mm at an acceptable price.
                      Best Regards
                      Bill

                      The nearest I have to a home page.
                      http://www.flickr.com/photos/peak4/
                      They're Watching You!

                      Comment


                      • #12
                        Re: EX-25 cannot be used in multiples

                        Originally posted by peak4 View Post
                        It was yes, using microscope slides, as I recall.
                        I did look into it at the time, but never did find a 17mm at an acceptable price.
                        I had one from my film era but a different version than the one Jens used. Having tried and found the 17mm quite nice I found the Samyang 14mm on Amazon Canada at such a good price I couldn't resist so the Tamron went back into the backup equipment cases.
                        It's the image that's important, not the tools used to make it.

                        David M's Photoblog

                        Comment


                        • #13
                          Re: EX-25 cannot be used in multiples

                          I seem to remember someone simple removing the electronics and direct wiring the pins. That way you maintain the electrical functions but camera does not realise that extra extension tube was there.

                          This also involved adding EX25 to an EC14 converter.

                          Gary

                          Comment


                          • #14
                            Re: EX-25 cannot be used in multiples

                            Originally posted by Phill D View Post
                            Alf what are you trying to achieve by doing this?
                            50mm of sturdy extension to my Sigma 105 f2.8 None of the m4/3 tubes are anywhere near as well constructed.

                            It is surprising that Olympus limits thnings in this way considering things from the past that they made for the OM system. Modern equivelants of the 20, 38 and 80 macro lenses and auto 65-116 tubes with the flash system could offer amazing possibilities.

                            I understand this was made to be optimised for the 50mm f2 which IMO fell short at 1:2 as standard.
                            OMD E-M1 OMD E-M5II MMF3 12-40 pro 12-50 EZ 14-42 EZ 9-18 f4.0 -5.6 40 -150f4-f5.6 R 60mm f2.8 macro Sigma 105 f2.8 macro Holga 60mm plastic Holga pinhole lens lens and a XZ-1 Olympus - 35 SP Trip 35 Pen EEs OM2sp

                            I nice view does not mean a good photograph. My FLickr

                            Comment


                            • #15
                              Re: EX-25 cannot be used in multiples

                              Originally posted by gazza95 View Post
                              I seem to remember someone simple removing the electronics and direct wiring the pins. That way you maintain the electrical functions but camera does not realise that extra extension tube was there.

                              This also involved adding EX25 to an EC14 converter.

                              Gary
                              Gary that would be an idea too
                              OMD E-M1 OMD E-M5II MMF3 12-40 pro 12-50 EZ 14-42 EZ 9-18 f4.0 -5.6 40 -150f4-f5.6 R 60mm f2.8 macro Sigma 105 f2.8 macro Holga 60mm plastic Holga pinhole lens lens and a XZ-1 Olympus - 35 SP Trip 35 Pen EEs OM2sp

                              I nice view does not mean a good photograph. My FLickr

                              Comment

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