Rumors > Third Party Manufacturers
5Dmk3 doesnt play with kenko teleconverters
bchernicoff:
--- Quote from: mspivak on April 19, 2012, 01:24:40 PM ---I just popped on my Kenko extension tubes on to my 5D Mark III and they work just fine. I bought them about 2 years ago.
--- End quote ---
Extension tubes have no electronics, they simply pass through the signals between lens and body. There can't be a compatibility issue with extensions tubes. I suppose if you stack enough of them there may be an increase in electrical resistance which could interfere with the signaling. This is not what is being discussed with regards to teleconverters. They have a cpu in them and intercept/modify communications between the lens and body making the process potentially prone to incompatibility.
pst:
Even after reading the troubles with Kenko TC's I purchased a Kenko 1.4x PRO 300 last week.
I've tried it with both 100mm f/2.8L Macro and 70-300mm f/4-5.6L and it works smoothly, no problems no matter what the mounting order is. The autofocus on 5Dmk3 has no more problems than usually. I'm very happy with the extended reach on the 70-300mm.
bchernicoff:
An update. I received a CPS loaner 35mm f/1.4L and it works fine with my extender so does my first gen Sigma 12-24 (not that anyone would ever want to), so at this point it works perfectly with every lens I have tested. I ordered mine from the Amazon link that Marus42 shared which is filled by Adorama: http://www.amazon.com/Kenko-1-4X-Teleconverter-Canon-Digital/dp/B002C6QC3E/ref=sr_1_1?s=electronics&ie=UTF8&qid=1334522186&sr=1-1
lmcgahey:
I have the Kenko 1.4x Teleplus PRO 300 DGX and I have had a problem with the 5Dmk3 & Kenko TC.
When I use it with the EF 100mm f/2.8L Macro IS USM. It doesn't take a picture of any kind even when I shoot a landscape. The screen goes blank, the camera makes a grinding sound, the grinding can be felt as well. Even when I turn the camera off the grinding continues. The only way to stop the grinding is remove the battery from the camera. No picture is saved to the card.
This lens & Kenko 1.4x TC still work fine on my 5Dmk2 in all applications the lens is intended for.
Marsu42:
--- Quote from: lmcgahey on May 03, 2012, 07:51:27 PM ---When I use it with the EF 100mm f/2.8L Macro IS USM it causes the camera to go into a grinding loop when I shoot.
--- End quote ---
Um, what's as "grinding loop"? Does this happen at all subject distances? The 1.4xtc + 100mm USM works fine with my 60d, too, it just fails when going to macro range because the effective aperture gets even smaller and thus af couldn't work.
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