autofocus met extender

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Flanker27
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autofocus met extender

Post by Flanker27 »

Nieuwe vraag:
wie kan me eenvoudig (en snel) uitleggen hoe dat zit met extender 1.4/2x bij Canon icm objectief en het niet meer werken van autofocus bij diafragma onder 5.6? Wie heeft ervaring en is het storend of hoe hou je er rekening mee?
Michel
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E. Schoonderwoerd
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Post by E. Schoonderwoerd »

I believe the topic must be in English, so my respons will be in English.

Some lenses with extenders will AF up to F.8.0. These are the EOS 1 models. Only centerpoint AF will work. With all the other camera no autofocus. You can bypass this problem by taping off 3 pins of the extender. I'm not sure the left or right three ones. When they are taped, the camera has no feedback from the extender. It doesn't see the extender and is "fooled". This will provide AF, but be aware of hunting from the AF system, due to the lost of light,
More information (use search option) can be found on
http://www.dpreview.com" onclick="window.open(this.href);return false; especially the canon lens forum.
Good luck
Emile
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Post by Flanker27 »

it is in either EN or NL but ok, thanks for your clear reply.
Michel
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Herbertvh
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Post by Herbertvh »

Als het in het Nederlands mag: zie mijn post in http://www.scramble.nl/forum/viewtopic. ... c&start=30. Daar staat het hele verhaal.

Herbert
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