Canon Autofocus Module / Chip for Manual Focus Lenses. Additional information for cameras: EOS 33V, EOS 50E, EOS A2, EOS 3, EOS 5, EOS 1N, EOS 1V, EOS 100, EOS D30, EOS D60, EOS 1DS MK II | |
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Just look at your camera without a lens. On a left side of a lens
mount (if you look from a lens's side) is a little switch which is locking when you mount
an AF lens. Canon cameras has 2 possibilities to see if a lens is AF or not: 1. using this switch (old type, usually on old cameras and "ones" like 1V, 1Ds Mk II etc.) 2. using a couple of contacts (long contact on a chip is a match). The trouble is that some lens adapters constructed to lock this switch some - not. So you should check it yourself. Just compare all 3 leafs on a Canon lens and on your adapter. You'll see than that one adapter's leaf is shorter. This long leaf on a Canon lens is pushing a switch and that means for a camera that an AF lens is mounted. What you should do: just make a little hole on a side of your adapter and place there a thin metal wire. It should be approx. 1 mm thick and come out from an adapter for approx 1.6mm. An idea is to compensate this leaf and to push a switch. If you press this switch and try to make a picture without a lens (or my chip) than you should get an error. It's normal, that means a camera is thinking that an AF lens is mounted but could not speak with this lens. | |
| Here you can see an adapter wich was modified to be able to push a little switch on a camera using a little pin. |
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| Canon EOS 1Ds lens mount |
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| Canon EOS 20D lens mount, note the difference |
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