6 votes

How does autofocus confirm work with manual lenses?

The AF confirmation actually works on a very similar principle to the old focus screen, in that they compare two different optical paths in order to determine exactly how in or out of focus the image ...
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  • 34.4k
5 votes

What is the difference between Dandelion focus-confirmation chips and others?

Sorry, I don't have the 5D Mk IV but I expect the 5D Mk III should be similar. Not all AF confirmation chips are created equal. There are 1st gen, 2nd gen, 3rd Gen, and 4th Gen. I think only the 4th ...
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  • 11.4k
5 votes

How does autofocus confirm work with manual lenses?

With this chip, you will, when you half-press the shutter, get the red dot in the viewfinder and the beeping as confirmation of focus, just as if you used a modern AF lens in manual focus mode. But, ...
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  • 6,770
3 votes
Accepted

Can I fine tune the manual focus confirmation on my Nikon?

Based on discussion in the comments above, where it is experimentally verified that autofocus microadjust can move the automatically-found focus point back and forth from the point identified as in-...
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  • 140k
3 votes

How can I confirm focus with a Nikkor 70-300 lens on a D3000?

I will just address your first question here - your second question is off-topic. Your camera will already tell you if the image is in focus: a green circle/dot will appear in the bottom left corner ...
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2 votes

How can i get AF confirmation working with Samyang 500mm f/6.3 with dandelion chip?

If you programmed the chip to return the correct maximum aperture of f/6.3, Autofocus on an EOS 6D is disabled, and therefore also AF-Confirm does not work. The AF-Sensors on this camera need at least ...
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  • 1,448
2 votes
Accepted

Best approach for accurate & fast focusing of fully manual lenses without live view. Focus chip, focusing screen or another approach?

This is probably opinion-based, but in my personal experience, hands-down, the focus screen is the way to go. I've used AF-confirm chipped adapter rings with manual lenses, and I've also swapped out ...
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  • 49k
2 votes
Accepted

Fotodiox focus confirmation on M42 to EF adapter

I thought it was halfway, but after a little more digging, I think it is a full exposure. Somebody wrote up some notes here that might be of some help. I don't know the answer to the question about ...
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  • 2,135
2 votes
Accepted

Would the Nikon Dandelion Chip give AF Confirmation on bodies without AF Motor?

The 28-80 has everything your D5200 needs to function in manual mode, including focus confirmation. AF-S or AF-I are required for the body to focus the lens, but the parts that determine whether or ...
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  • 5,392
1 vote

What can I do when a PK-EOS ring adapter with AF conformation chip gives "communications error" with my Canon 650D?

It sounds like your adapter was developed earlier than the EOS Rebel T4i/650D. The third party makers of such adapters don't license technology from Canon, they reverse engineer it. If Canon starts ...
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  • 167k
1 vote

Can I fine tune the manual focus confirmation on my Nikon?

On a Nikon, [AF fine-tune] is linked to the lense's s/n in the built in CPU, usually you assign the last 2 digits of the lens (from the CPU) to the newly tuned value. The issue you have with non Nikon ...
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1 vote

Can I fine tune the manual focus confirmation on my Nikon?

The procedure should be quite similar to the one for calibrating with autofocus lenses (since the camera still uses the AF sensors for confirming manual focus), the only difference being that you must ...
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  • 2,024
1 vote

Canon 55-250, Rebel/XS, fails on *manual* focus?

Since you have tested the lens on a T2i, the problem is mostly with the older body. Get it serviced. I guess, there must be some discrepancies with the lens contacts on the XS body.
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