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Ef-s 18-55??? - Photography

Why is it this is a 300D exclusive lense? Can it not be used on any other EOS bodies??? Thanks Simo -- Simo ------------------------------------------------------------------------ Simo's Profile: http://forums.eyo.com.au/member.php?action=getinfo&userid=7197 View this thread: http://forums.eyo.com.au/showthread.php?threadid=28804...

  1. #1

    Default Ef-s 18-55???


    Why is it this is a 300D exclusive lense? Can it not be used on any
    other EOS bodies???

    Thanks
    Simo


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    Simo Guest

  2. #2

    Default Re: Ef-s 18-55???


    "Simo" <forums.eyo.com.au> wrote in message
    news:forums.eyo.com.au... 

    The rear element sits closer to the film plane (a design for digital???) so
    if used on a standard body the mirror will hit the rear element. The 300D
    mirror moves back as it goes up to miss the lens.


    AU Guest

  3. #3

    Default Re: Ef-s 18-55???


    Thanks for the info.

    Simo


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  4. #4

    Default Re: Ef-s 18-55???

    It is so that you can get a decent wide angle lens. The crop factor gives
    you 1.6 so a it becomes a 28-90.

    "Simo" <forums.eyo.com.au> wrote in message
    news:forums.eyo.com.au... 
    http://forums.eyo.com.au/member.php?action=getinfo&userid=7197 


    boh Guest

  5. #5

    Default Re: Ef-s 18-55???

    boh <com> wrote: 

    Actually, the lens was designed for the smaller CCD so there technically
    isn't a crop factor - it's 1:1. 18-55mm is the 35mm equivalent. Just another
    way of saying it. :)


     
    > http://forums.eyo.com.au/member.php?action=getinfo&userid=7197 
    >
    >[/ref]

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    eug Guest

  6. #6

    Default Re: Ef-s 18-55???

    In <bntjmn$3pn$cc.uq.edu.au> eug k wrote: 
    >
    > Actually, the lens was designed for the smaller CCD so there
    > technically isn't a crop factor - it's 1:1. 18-55mm is the 35mm
    > equivalent. Just another way of saying it. :)
    >[/ref]
    Yep, but 35mm FOV equivalent to 28-90.
    Larry Guest

  7. #7

    Default Re: Ef-s 18-55???

    Larry Ng <com> wrote: 
    >>
    >> Actually, the lens was designed for the smaller CCD so there
    >> technically isn't a crop factor - it's 1:1. 18-55mm is the 35mm
    >> equivalent. Just another way of saying it. :)
    >>[/ref]
    > Yep, but 35mm FOV equivalent to 28-90.[/ref]

    that's right.. i sometimes seem to have a problem writing coherent
    followups. :)



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  8. #8

    Default Re: Ef-s 18-55???


    "AU Digital Photo Of The Day" <com.au> wrote in message
    news:bnsrro$t3n$austar.net.au... 
    so 

    I'm struggling with this - isn't the rear-element to film plane distance a
    critical feature of the mount (in this case canon EF)? Do they still call
    the lens EF, or is it a new mount, reverse-compatible with EF?

    & do other lenses marketed as "for digital" have this not so well doented
    feature? Eg the tamron XR Di 28-75/2.8?


    Wouldn't want them fouling my mirror...


    Adam F


    Adam Guest

  9. #9

    Default Re: Ef-s 18-55???


    "Adam F" <edu.au> wrote in message
    news:3fa47f50$0$1727$iinet.net.au... 
    > so [/ref]
    300D 
    >
    > I'm struggling with this - isn't the rear-element to film plane distance a
    > critical feature of the mount (in this case canon EF)? Do they still call
    > the lens EF, or is it a new mount, reverse-compatible with EF?
    >
    > & do other lenses marketed as "for digital" have this not so well[/ref]
    doented 

    It's a new mount designed by Canon, however the camera body has two mounts
    in one. So you can still fit normal EF lenses on the 300D (regardless of
    brand)as well as the EF-S lenses. The reverse is not the case, you cannot
    mount an EF-S lens on a standard EF mount body... it simply does not fit,
    thus protecting your mirror in non-300D bodies.

    All of the other "for digital" lenses have someting different in the
    internal optics, rather than a repositioned rear element... it is my
    understanding that it is only Canon with this style of lens at this stage.


    AU Guest

  10. #10

    Default Re: Ef-s 18-55???

    "AU Digital Photo Of The Day" <com.au> wrote in message
    news:bo1veh$fkl$austar.net.au... 
    cannot 



    ah
    thanks


    adam f




    Adam Guest

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