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 Replies: 10 / Views: 2,237 |
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Valued Member
United States
441 Posts |
I just purchased a used mint Kenko C-AF 2X Teleplus MC7 teleconverter for use with my Canon T6i and EF100mm f/2.8L Macro IS USM lens. It installs with no problem between the canon lens and body. I was taking close up pics of coins with my stand; took about a dozen pics of a dime in quick succession without a problem or lockup. EXIF data is recording so everything appears to be working. However, I took it outside to try some different shots to see what they'd look like. I took several pictures in succession on programmed auto, then all of a sudden I get this: "ERR 01 Communications between the camera and lens is faulty. Clean the lens contacts." I've cleaned the contacts on both lenses and reinstalled. Again, I can take a few pics, then it locks up if using camera outside of live view. I've emailed Canon tech support to see what they say. I've discovered that they're not much help on past issues I've contacted them on so I'm not sure what I'll get back or when. Any suggestions as to why this problem is occurring? Thanks in advance. EDIT: Canon's response: "Thank you for contacting Canon product support regarding the difficulty you've encountered with your EOS Rebel T6i and your teleconverter. I understand the frustration this can cause and I'm happy to assist you. If your EF 100mm f/2.8L Macro IS USM works without difficulty without the teleconverter, because we don't offer support for third-party accessories, I recommend contacting Kenko Tokina for assistance. For contact information, please use this URL: http://www.kenkotokinausa.com/contact/Please let us know if we can be of any further assistance. Thank you for choosing Canon." Edited by andywoj00
09/22/2016 11:00 pm
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Pillar of the Community
United States
9395 Posts |
I had the same symptoms with a Canon T6s (presumably similar to the T6i) and a Canon 2x Teleconverter. The setup was different: Thorlabs tube lens attached to Canon TC attached to T6i. Apparently, the camera saw the Canon TC, but it looked like no lens was attached (electrically).
To get around the problem, I put black electrical tape over the contacts on the Canon TC, so the camera couldn't see the TC or the tube lens. This situation is different than yours, but the workaround with electrical tape might work in your case, too.
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Valued Member
 United States
441 Posts |
Pepactonius,
So, simply put, if I tape off the contacts, the whole works will be in manual mode, correct? Additionally, is there a kenko 2x to that WILL allow AF and IS to work with my lens?
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Pillar of the Community
United States
9395 Posts |
Quote:
So, simply put, if I tape off the contacts, the whole works will be in manual mode, correct? The camera would not be able to communicate with the lens, so you'd have to shoot wide open, I think (for a Canon lens without aperture ring). There'd be no autofocus, but maybe the camera could set the shutter speed automatically. The Kenco would probably work better with a non-Canon lens, with aperture ring. Maybe there's some kind of 3rd party adapter somewhere that can set the Canon lens aperture? |
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Valued Member
United States
441 Posts |
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Pillar of the Community
 United States
4593 Posts |
If it works for several shots and then stops working, it sounds like the TeleConverter is defective. Try returning/exchanging it.
-----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/ |
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Valued Member
United States
441 Posts |
I checked the continuity on the contacts. The contact in the pic with the arrow does NOT have continuity to the pin on the other end of the lens. Should it? I would assume so, but I'm going to call Kenko USA tomorrow to find out. If it's supposed to, I may have to get it repaired if not too much $$. I picked up this lens from a camera store in Japan. Seller said I could return, but it'll cost me $25 to ship back to get a refund of $55 that I spent. IMHO, not worth it. If I'can't get it repaired or Kenko will not work with me, I'll chalk it up to a $55 lesson to only buy this type of item from a US seller. If any of you have a lens like this, and can use a multimeter, I'd appreciate it if you'd check your pin-outs and see if you have continuity.  |
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Pillar of the Community
Canada
2784 Posts |
andy question do you have the wire drawing for this lens. how do you know which one is ground. be-careful these lens. could have a spare circuit. that is in active. first thou make sure you know which wire is ground.
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Pillar of the Community
United States
9395 Posts |
My Canon 2X teleconverter has 7 pins on the camera end, like your Kenco. It has 11 pins on the lens side. The Canon T6s body has only 8 pins, so it's doesn't look like the Canon teleconverter is a straight pin-for-pin passthrough from camera to lens.
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Valued Member
United States
441 Posts |
Pepactonius, Got a call into Kenko on the continuity issue. We'll see if they reply. Here are some pics of what I have pin-out-wise. Looks to me like all should line up straight through. I could be wrong on this. If there IS supposed to be continuity on all pins, I may have a bad board or ribbon internally. We'll see what Kenko says. Lens seller on ebay says he'll take it back and pay return shipping. But I want to makes absolutely sure the lens is defective (or not) before I start the return process goat-rope. T6i body pins: Teleconverter Lens-side pins: EF100mm Macro lens pins:  |
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Pillar of the Community
United States
1027 Posts |
I have had a similar experience with extension tubes that pass the EF signals through to the lens (and vice versa). What I traced my issue to was a disconnect occurring when the camera was horizontal (normal) as opposed to vertical (macro use). If there is any play in the mounts this can occur when the weight of the lens ever so slightly "bends" the TC=lens assembly, causing a disconnect. Make sure that the lens and TC are in full lock and maybe support the lens. These steps solved my issues.
P.S. Great pictures!
Edited by clairhardesty
09/29/2016 12:35 am
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Replies: 10 / Views: 2,237 |
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Posted 09/22/2016 10:51 pm
