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Old Feb 28, 2006, 6:15 AM   #1
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Hi!

Where can I find scheme of Minolta Af mount with explanation about the function of each contact, voltage? Probably I will find this information in service manual, but I don't have it of course :sad:

10x
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Old Feb 28, 2006, 7:15 AM   #2
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I have no idea. But, the extra contacts are used for things like ADI to pass distance information back to the camera for more accurate flash exposure.

Non-ADI lenses only have 5 contacts.

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Old Feb 28, 2006, 10:46 AM   #3
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Jim, do you know wich contact gives the information about focus confirmation? How does the focus confirmation work?
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Old Feb 28, 2006, 10:51 AM   #4
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Also, don't a few of those "power zooms" have more than 5 contacts (the x/xi ones) ? Seems to me they do.
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Old Feb 28, 2006, 10:59 AM   #5
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I do not know the specific purpose for each contact.

But, I can tell you that contrary to popular belief, even older non-ADI lenses with 5 contacts still provide focus distance information, although it may not be as accurate as newer ADI (D) lenses.

I can remember some comments from Dalibor Jelinek stating something to the effect that this information is "surprisingly accurate" when he was doing some testing with non-ADI lenses with newer .mrw files from a 7D).

Dalibor Jelinek figured out where Minolta puts the focus information a long time ago (even before the 7D and 5D).

P.S.

He has some good documentation on the maker notes tags here:

http://www.dalibor.cz/minolta/makernote.htm

He's got some documentation on .mrw format here:

http://www.dalibor.cz/minolta/raw_file_format.htm

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