I have just bought a fotodiox chipped adapter for M42 to EF canon mount.
I am hoping to be able to use the canon autofocus sytem to get focus confirmation.
I have mixed results after following the broken English instructions. So I was hoping there was someone out there who was successful with getting this to work.
I am following the instructions in the lower half of the page called
Programming the Dandelion Chip.
The instructions say to set the aperture to certain values the press the shutter release, as a means to program the chipped adapter.
Does this mean to depress the shutter release fully, as in take a picture? Or depress half way.
So for example to communicate to the chipped adapted that you lens is f3.5 maximum aperture, you would put aperture to F64 then press shutter release, the F57 and SR, then F64 and SR, then f3.5 and SR to set f3.5 , then press F57 then SR, F64 then SR, then F57 then sr.
Once I set the aperture and focal length of the lens, it was back focusing heavily.
To calibrate this it says to change the focus value. Default value is 27, and 1-12 , 28-31 are front focusing values, and 13-26 are back focusing values. What does this mean?? If my lens is severely back focusing, what is the value I want to choose? Do i choose back focusing values to correct back focusing, or do I chose front focusing values to fix back focusing?