HELP: Canon Rebel XTi 400D and Old Prostart Lengs Incompatibility?

Discussion in 'Canon' started by PhotoAM, Jul 22, 2007.

  1. PhotoAM

    PhotoAM Guest

    I recently purchased Canon Rebel XTi 400D body hoping to reuse my two old
    SLR lenses that I used for several years with my old conventional Rebel. I
    am getting very unreliable behavior with the new digital SLR. The two old
    lenses are:

    Promaster Spectrum 7: 35-80mm
    Promaster Spectrum 7: 70-210mm

    The autofocus works fine with I press the button half-way down. However,
    most of the times, when I press it all the way to down, I get Err 99. Canon
    troublshooting online help recommends the steps: cleaning the lens contacts,
    ...., remove third party lens. Does this mean that there is some
    incompatibility between my XTi and my old Sigma lenses.

    So far, I have been able to avoid the error about 90% of the times for the
    Portait AE setting. For all other settings, including the manual setttings,
    it fails with Err 99. Has anyone encountered similar issues?

    Do any of the experts know or can guess whether this is a problem with body
    or is a lens incompatibility problem. Wanted to check with you folks before
    I folk out for a Canon lens.

    PhotoAM, Jul 22, 2007
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  2. PhotoAM

    nemo Guest

    I recently bought an EOS 400D (the sensible European name! :eek:) body and am
    using the old Canon lenses, a 50mm and 28mm, from my old EOS1000 with no
    problems. Because of the multiplication factor, the 28mm comes out at 44.8mm
    and the 50mm at 80mm, which is very useful.

    So if a 400D body will work with older Canon lenses, perhaps your Promaster
    Spectrum ones are at fault.

    nemo, Jul 25, 2007
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