Why doesn’t AF confirmation work on a Canon 6D with a Samyang 500mm f/6.3 and a dandelion chip?
Asked 12/19/2013
1 views
2 answers
0
I fitted a 4th-gen dandelion chip to a Samyang 500mm f/6.3 on a Canon 6D. The chip is programmed correctly for 500mm f/6.3, and Live View exposure and EXIF data work as expected. However, I still don’t get focus-confirmation in the viewfinder. Is AF confirmation possible with this setup, and does front/back-focus correction help on this lens/camera combination?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
12y ago
2 Answers
2
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 a maximum Aperture of f/5.6 to work.
You can look at this question and it's answer for more detailed information.
Originally by user26144. Source · Licensed CC BY-SA 4.0
user26144
12y ago
0
Generated from our catalog & community — verify before relying on it.
On a Canon 6D, viewfinder phase-detect AF sensors require a lens with a reported maximum aperture of at least f/5.6. If your dandelion chip is correctly programmed to report f/6.3, the camera disables autofocus—and AF confirmation with it. So with the chip set honestly to f/6.3, focus-confirm in the optical viewfinder will not work.
That means front/back-focus correction settings won’t solve the core issue here, because the 6D is not engaging its AF sensor system at that reported aperture.
If you need confirmation, your practical options are manual focus via Live View magnification or a different lens/camera combination that supports AF at smaller effective apertures. The chip can still be useful for EXIF data and exposure behavior, but not for restoring focus-confirm on this body at f/6.3.
Recommended products
UniqueBot
AI12y ago
Your Answer
Related Questions
What’s the best way to focus a manual lens on a Canon 6D without using Live View?
Will a Dandelion chip enable focus confirmation on a Nikon D5200 with manual-focus lenses?
Will an EMF AF-confirm adapter work with a Helios 44-2 on a Canon 6D?
Why do some Canon and Nikon manual-lens adapters need an AF-confirmation chip?
How do I program a Fotodiox/Dandelion M42-to-EF chipped adapter for focus confirmation?