arrived today and was surprised that it reports the corrected aperture of my 400/5.6L on my 70D and ID2n. Interesting enough, it even autofocuses Something that my old Tamron 1.4X SP AF (5-element) can not do on my 70D and 7D.
Does anybody have an explanation how this is possible?
Maybe, just maybe, I do not need the elusive Tamron 150~600 anymore as the Canon 400/5.6: with this new wonder kid allows me to reach out and touch someone
how many contacts does it have ? I googled it but saw 2 different ones (that seeme to be called the same) , 1 had the 3 extra contacts the other didnt .
I used to have a Kenko 1.4 TC (it seems to have walked from a bag) with the extra contacts and it was a very good TC .
Now if its registering f8 on the 400/5.6 I would assume it has the 3 extra contacts .on your 1D2n it will AF on just the middle AF point (1 only) . Im surprised though that in the same configuration (ie registering f8) it will AF on the 70D . is this normal Phase detect AF or the on sensor (live view) AF?
Dan, both the MC4 & Pro versions report correctly. Kenko has been known for this capability for some time. I originally posted in the thread you referenced having tried a very old Kenko 1.4x version (not these two) on the 70-300L and experienced very poor results. In fact, the AF was flat unreliable. Fast forward, after researching some reviews putting the Pro version essentially on par with Canon's Ver II, I decided to pick one up and mate it to the 70-300L.
This combo has performed very well for me
Would the AF work without taping the pins on a 7D / 70D?
Thank you
dan
schlotz wrote:
Fast forward, after researching some reviews putting the Pro version essentially on par with Canon's Ver II, I decided to pick one up and mate it to the 70-300L.
This combo has performed very well for me
This might be worth noting about the Kenko C-AF 1.4x Teleplus MC4 DGX. At least on my particular copy.
Bought it new and used it a few times with my 7D and my 1D Mark III. On the 1D Mark III I used it in conjunction with the Canon 300 f2.8 IS + 2X Mark III. Wanted to see if I could extend that reach out to the 1000mm range for photos in good sunlight.
It focused of course but made the focus twitchy and also affected the burst performance (surprisingly). The burst would pause momentarily after a couple shots. This was NOT in Servo mode, it was using One-Shot focus mode. The burst performance was pretty erratic at times.
On the 7D I used it with my Canon 400 f5.6 prime. Very similar results. One-Shot focus again a bit slow to lock on, but it did focus, and very erratic burst performance out of the camera.
I used to have a Tamron 1.4x non-reporting converter used with my 400 f5.6 prime. It caused slower AF also, but never affected the burst mode like that. Apparently the electronics of the reporting Kenko converter is causing the erratic camera behavior.
Pretty much useless to me at this point. But since it wasn't expensive, no big loss.
Just curious if EXIF showed the resulting focal length and aperture properly.
Also interested to know which TC is closer to the body.
Thanks
dan
Garylv wrote:
This might be worth noting about the Kenko C-AF 1.4x Teleplus MC4 DGX. At least on my particular copy.
Bought it new and used it a few times with my 7D and my 1D Mark III. On the 1D Mark III I used it in conjunction with the Canon 300 f2.8 IS + 2X Mark III. Wanted to see if I could extend that reach out to the 1000mm range for photos in good sunlight.
Yes, everything reported properly as others have noted also. Kenko TC connected to the back of the Canon TC already on the lens, then connected the whole thing to the body. That's the only way it will fit. Canons have a protrusion on the front that will not fit onto those third-party converters.
If I had only used single shot instead of a burst, I wouldn't have noticed it until sometime later. I tried the burst right away though.
I originally posted this in the wrong thread.
Just for anyones info:
My experience with Kenko TCs
I tried the MC4 AF 1.4 DGX on a Canon 5D III and the Canon 70-300L.
It would do one or two exposures and then either slow down to about 1 frame/sec or basically lock up.
Some of the images were cut off horizontally.
I was able to try a friends version of I believe the same model and the frame rate was normal.
I decided that I had a faulty version and returned it. (B&H, no problem and they sent me a prepaid return mailing label).
I Bought the Pro 300 DGX 1.4 AF version as i wanted to be able to use a TC on my 70-300L, Canon's TC will only fit the lens at max tele extension, it is a physical limitation. At the retracted position the Canon TC makes contact with part of the rear of the lens.
This model seems to be fine with the 70-300L.
However, when I try to use the Kenko Pro 300 on my Canon 400 F/5.6 with my 5D MkIII the aperture registers as 00 and the battery shows discharged regardless of the charge and the camera locks up.
I have to power off and remove the battery to get the camera to start up again even after removing the Kenko TC from the 400.
I don't know what part of the chain causes the fault and I am not keen on experimenting too much.
I will keep the TC as it works with the 70-300 which is why I wanted it.
Very strange, some part of the system does not like it.
Edited to add:
After reading the quote below from another thread, I looked at my TC and after the "Made in Japan" printing the dot is Yellow, whatever that means.
Quote: Apparently, if it has (after "Made in Japan" and in addition to the red dots elsewhere) no dot then it is v1 DGX, green dot = v2 DGX and blue dot = v3 DGX. Quote.
Lotuselite wrote:
After reading the quote below from another thread, I looked at my TC and after the "Made in Japan" printing the dot is Yellow, whatever that means.
Quote: Apparently, if it has (after "Made in Japan" and in addition to the red dots elsewhere) no dot then it is v1 DGX, green dot = v2 DGX and blue dot = v3 DGX. Quote.
Early July from B&H. It seems to work properly with the 70-300L but as I posted with the 400 F/5.6 no go.
A strange reaction to disable the aperture to 00 and the battery indication to discharged, not to mention having to cycle the battery to get the camera going again.
I thought about returning it with an explanation to B&H in the hope they might let Kenko know but it does work with the 70-300L
Which is why I wanted it although I now end up with the Kenko and Canon TCs if I want to use a TC with my 400 and 70-300L.
After reading your post, I tested my 400/5.6L with my 7D and the non-pro DGX. If there was enough light, AF locks focus without a problem and I was able to shoot a burst of 12 frames (RAW + L JPEG) or more.
I have also used the same TC with a 1D2n and 400/5.6L without any problem.
I am now thinking of getting the PRO version . . . maybe
Cheers
Lotuselite wrote:
Early July from B&H. It seems to work properly with the 70-300L but as I posted with the 400 F/5.6 no go.
A strange reaction to disable the aperture to 00 and the battery indication to discharged, not to mention having to cycle the battery to get the camera going again.
I thought about returning it with an explanation to B&H in the hope they might let Kenko know but it does work with the 70-300L
Which is why I wanted it although I now end up with the Kenko and Canon TCs if I want to use a TC with my 400 and 70-300L....Show more →
Something that my old Tamron 1.4X SP AF (5-element) can not do on my 70D and 7D.
