Teleconverter sought after

Discussion in 'Beginner Questions' started by Pete.c, Jun 12, 2019.

  1. Pete.c

    Pete.c Member

    Joined:
    Oct 13, 2018
    Messages:
    37
    Equipment:
    Canon EOS 4000D
    Hi all once again,

    Probably a simple answer, but it's a little technical for me
    I am looking for a teleconverter at the moment, I have looked around, but to no avail.
    I have a Canon Eos 4000d - EF-S. I am looking for a teleconverter to fit this camera and a Sigma 150-500mm f5-6.3 DG OS HSM. All the converters I have looked at are EF fitting only not EF-S.
    Does anybody know of a teleconverter that would fit. Auto focus only, I haven't got the grasp of manual get and its rather difficult shooting birds. Would like X2.0 or X1.6. Could you also tell me how much more distance it would give me.

    Thanks for your help
    Pete.
     

  2. johnsey

    johnsey Site Moderator Staff Member Site Supporter

    Joined:
    Apr 21, 2017
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    Location:
    Fargo, ND
    Equipment:
    5dMk2, 20D, 70-200 2.8 L IS, 100mm 2.8 Macro USM, 50m 1.4, 85mm 1.8, 17-40mm 4.0 L, Rokinon 14mm 2.8; Pixma Pro-100
    The issue isn't so much the ring mount, you can mount an EF lens on a crop camera. The issue is the S lenses which stands for short back-focus, these lenses protrude further back into the camera, on a full frame these lenses would get into the way of the mirror as well as produce an image smaller than the sensor. However your lens is a standard EF mount, so a tele-converter should work with it.

    If you had an EF-S lens then the tele-converter may have enough room to accommodate this, so you likely can use your EF-S lens on it, but I don't see you having the ability to auto-focus in this case. By design i don't see a EfS converter being made.

    Also keep in mind that they do degrade the image quality a bit. If you use one a would invest in a higher quality one only use if necessary.
    If you want extreme reach it may be worth considering a bridge camera, there are some with very long focal zoom that may work for those situations. I myself have thought about getting a P900 or P1000.
     
  3. Pete.c

    Pete.c Member

    Joined:
    Oct 13, 2018
    Messages:
    37
    Equipment:
    Canon EOS 4000D
    Thanks for the reply your words have now put me off the idea totally, thanks.
    A friend who attends the same wildlife park has amongst others a p900, I've seen some of the pictures, very nice.

    pete.
     
  4. GDN

    GDN Active Member

    Joined:
    Jul 22, 2018
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    394
    Location:
    South Island, NZ
    Equipment:
    A little Canon stuff

    Just to add one more thing to your question. If you use a teleconverter, you will loose one stop of light for a X1.4 and two stops of light with a X2 converter. So add this to a lens with a f6.3 maximum aperture and I would guess that your camera will not be able to auto focus and the viewfinder will get dark, so manual focus will not be easy either. A slow aperture will mean a slower shutter speed to compensate. Not what you are looking for when using a long lens.

    Gary
     

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