Headshotzx Goldmember  4,488 posts Likes: 141 Joined Dec 2007 Location: Singapore More info | Jan 02, 2011 15:00 | #1 Hi all, I recently got myself a sweet little Nikon 35mm f/2 AI-S lens and a solid adapter with AF-confirm chip. Sure enough the AF confirm chip was front focusing a whole lot, so I backed it up to +20 and it was alright.
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TooManyShots Cream of the Crop 10,203 posts Likes: 532 Joined Jan 2008 Location: NYC More info | Jan 02, 2011 21:36 | #2  Permanent banThe adapter maybe either not at the right thickness to cause focusing error. You would need another adapter with a different chip ID to fool the body in thinking that you have a different lens. Then, the MA setting would apply to that lens. One Imaging Photography
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Jan 02, 2011 23:33 | #3 |
jetcode Cream of the Crop 6,235 posts Likes: 1 Joined Jul 2009 Location: West Marin More info | Jan 03, 2011 01:54 | #4  PermanentlyGenerally the high end adapters are precise however I have had miserable luck with focus confirmation and now use it only to ball park focus hand held stopped down.
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TooManyShots Cream of the Crop 10,203 posts Likes: 532 Joined Jan 2008 Location: NYC More info | Jan 03, 2011 10:00 | #5 Permanent banHeadshotzx wrote in post #11561977  I see. So I should be getting lens adapters from different sellers and hope they're not the same?
One Imaging Photography
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newworld666 Goldmember  2,306 posts Likes: 20 Joined Jan 2009 Location: on earth More info | Jan 03, 2011 10:36 | #6 You should buy programmable V5+ AF confirm chip (you can program micro adjustment directly on the chip) and you will even get improved AF confirm and new functions like "trap" shooting. So, you won't get any trouble with many adaptors. Marc
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Jan 03, 2011 10:47 | #7 |
newworld666 Goldmember 2,306 posts Likes: 20 Joined Jan 2009 Location: on earth More info | Jan 03, 2011 11:12 | #8 For Nikon Olympus and M42 I use AF confirm adaptors to EOS and the chip must be programmable with a quite recent version .. Marc
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themadman Cream of the Crop  18,871 posts Likes: 14 Joined Nov 2009 Location: Northern California More info | Jan 03, 2011 12:56 | #9 I use EMF chips which I use have focus adjustment built it so you can program each chip Enter focus micro adjustment 1. Turn the dial and set the aperture to F/2.5 and press shutter button to enter this mode. EMF chip accepts focus micro adjustment value, ranging from 0 to 31. The value is defined by two numbers. If the micro adjustment value of your lens is smaller than two numbers, you shall insert a zero in front of the actual number. Choose the desired number and press shutter button to enter the value one by one. Goto Store the parameters to EMF chip For example, if the micro adjustment value is 25, you shall enter F/2.5 - shutter button + F/3.5 – shutter button Notice: Please enter the micro adjustment value according to your own tests. The value shall not be entered based on calculation alone. Goto Store the parameters to EMF chip When you finish entering all the parameters of your lens, you shall store them in the ring for normal shooting. Here is how: Change the aperture value to F/57, press shutter button once. Change the aperture value to F/64, press shutter button once. Change the aperture value to F/57 again, press shutter once. If all the values you’ve entered are correct, the above three steps will store all the parameters you’ve just entered to the chip on EMF chip. If you have miss some steps in the entering process or the value you’ve entered does not fit the value range requirement stated above, the ring will automatically exit setting up mode and no parameters will be stored in the ring. All the data stored in EMF chip will not lost when camera is powered off. The default parameter settings of EMF chip is 50mm F/1.4, please change the parameters according to your lens’ specifications. Will | WilliamLiuPhotography.com
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scepticswe Member 234 posts Joined Dec 2008 Location: Stockholm, Sweden More info | Jan 03, 2011 12:58 | #10 The "trap" function comes from the fact that the chip fools the camera into thinking there is an AF lens attached to the camera. Since the camera normally doesn´t release the shutter unless at least one AF point is in focus, it waits until you tune in the focus manually, even if you completely depress the shutter. EOS 500D, Sigma 17-50 f/2.8 EX DC OS HSM, Sigma AF 70mm f/2.8 EX DG macro
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gasrocks Cream of the Crop  13,432 posts Likes: 2 Joined Mar 2005 Location: Portage, Wisconsin USA More info | Jan 03, 2011 14:35 | #11 I have only got 2 AF confirm adapters. I have an adapter for each lens I own. I did AF adjust one of the 2 confirm chips. It was +19. I still do not trust it. GEAR LIST
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phreeky Goldmember 3,515 posts Likes: 15 Joined Oct 2007 Location: Australia More info | May 21, 2011 06:29 | #12 Bringing this back up after a search
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phreeky Goldmember 3,515 posts Likes: 15 Joined Oct 2007 Location: Australia More info | May 21, 2011 06:57 | #13 Can't believe I'm replying to my own message with a solution (somewhat) so quickly. Anyway...
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STELYA Hatchling 9 posts Joined Dec 2011 More info | Dec 30, 2011 04:07 | #14 Could someone help with this problem?
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