Does anyone know, if I use this 1.4x TC with my Canon 100-400 zoom, will I still retain the autofocus and IS?
238471
It works fine on my Nikon and the autofocus works fine. This is a much better choice than the 2x due to light loss. I have no complaints about my purchase.
238472
I have the older version of Tamron's teleconverter (140 F-CA 1.4X). Used it only once with my 100-400 and then put it away because of the overall image quality loss (sharpness, resolution). IS worked fine - AF didn't but then again, it was the previous version of the converter.
238473
it does for my canon lenses 15-85, 60, and of course for my tamron lenses..best david
238474
With respect to the latest release of the Canon 100-400 IS II USM (released mid December 2014) along with a 5D Mark III, this TC does not work. I tried two and no success. The body gives an error. We are forced to acquire the Canon TC 1.4 III which does work however since the lens is converted to F6.3 - F8, there are only 5 center focus points.
238475
Afraid I don't have an answer. I would suggest consulting someone more knowledgeable at a camera store.
2231208
Yes, it does. Some users have reported AF problems, but this TC has worked very well for me attached to every lens - Tamron & Canon (including 70-200 f/4L IS) I've paired it with. By the way the IS still works with it also. I'm very happy with my copy.
1911892
No not in auto-focus only in manual. I really prefer to focus mine in manual anyway now, just takes a little practice and you will be shooting like a pro in no time. I had one just like this and got broken but am getting another as takes great shots.
888898
As stated by the other respondents, yes it has autofocus which can be switched off to manually focus. I've had no issues with the autofocus on my Canon 40d. I also own a sigma 1.4 teleconverter. With the teleconverter on the autofocus doesn't work and you have to focus manually. I've found that 500 is usually plenty of range so honestly I've only had the teleconverter on it once and then only to play around. I was also highly impressed with the OS (Optical Stabilization) on this lens. It is very heavy, but with the OS it is actually not nearly as hard to hand hold as I thought it would be. (But I always use a tripod if I can... no kidding it's very heavy!) Hope this helps! -ed
871931
Sorry, I haven't had this problem. I think I remember it's best to focus from a normal angle to assure good focus zooming in. I presume you are also careful to center the image on the subject you want sharp. Ther might also be a setting to tell the camera how to handle close up shots. There may be levels orb types if selectivity possible. Depth of field is more critical in telephoto so it doesn't take much to throw it off. Sorry I don't have the camera or manual handy.
295665
Seth, I can only vouch for the T3i and T4i. It works fine on both of them. Manual focus only.
386510
It depends on the kind of lense your using. The zoom ring has to be stationary so the band for the follow focus can stay in one place. What lense are you looking at using? Also autofocus doesnt really give you any control while shooting video. You would still want to use manual focus.
1898462
I would thank so. I use it on my 100-400mm and works great. Im not sure however of the autofocus?
1065937
It should work for Fine with manual focus. I wouldn't expect autofocus to work at the long end. I forget the max apeture on the short end of the tamron but I would expect it to be slow auto focus at best even at the short end. The teleconverters are really best suited for fast glass (f2.8 for f4).
1427355
Not the 1.4 converter, but with extension tubes. You can retain auto focus with the right extension tubes. Kenko DG Auto Extension Tube Set for the Canon EOS AF Mount works for me.
939137
I am not sure but I think the VR does respond, from my experience using the 28-300 VR with the Kenko 1.4TC hand held I did not get a shake blur yet. On the Kenko site they are claiming that the electronics in the TC are compatible with the lenses so I can only assume that it does work. Bear in mind that once you increase the focal length a hand shake would be more noticeable so you may not get the 3-4 F stop vibration reduction. In any case in order to get good results with a TC you need a good source of light which will any way increase your shutter speed. TC's are not the perfect solution but are best for the money when you need it. I hope this was helpful, sorry I could not be more precise.
2236284
No, it needs to be a f/4 lens to work reliably on that camera with a TC. 1. The TC combination causes the lens to become a F/8, and your camera will only focus reliably at f/5.6. It may not tell the camera that its there, so the camera will try to focus, but results will be variable at best. 2. A TC magnifies any faults in a lens, and that lens has enough abberations without magnifying them. 3. Kenko now has 2 or 3 versions of that lens on the market. They have a color paint dot (besides the red one indicating a EF compatibility) but the part number did not change. Each version reacts differently on different camera / lens combinations. I'd stay away from it, or at least, make sure it can be returned. 4. Amazon uses co-mingled inventory, which means that all items with the same part number are placed in a bin. Different suppliers send in inventory and its all stored together. That means that you do not know which version you will get, a 4 year old obsolete one, a 2 year old obsolete one, or the current model. It doesn't matter who the seller is, you just don't know. I got the oldest one when I bought mine, and it locked up my Camera, whereas the newest one does not lock it up. 5. You may purchase a new camera some day, and find that the TC won't work with it. Canon's new T6i does not work with a long list of Sigma lenses, and they have put out a service notice. Kenko does not upgrade items in cases like that, you must buy the new upgraded model with the same part number but different paint dot, assuming you know of the silent upgrade.
1932393
I use mine with a 70 -200 canon and every thing works great including auto focus. Very sharp
415040
Mine did the same thing but pretty much all the way thru the zoom function. I sent it back and ordered the HS50EXR glad I did, zooming is real smooth, focus is faster ect. Well worth the extra cost.
1451026
It works for me on both my 70-200 f4L IS and Tamron 70-300 IS. I don't own the Canon 70-300, but I'm sure it will function for you just fine. It works for me, functionally, the same as these lenses do without the TC. I like it.
2109105
I used my old 30D lens with the adapter, a 75 to 200 and a 300 zoom, and the auto focus is really slow and noisy.. But I never use auto with video anyway.. Lock in the shot, and go. I use manual..
1089976
Thank you D. Fletcher! That never occurred to me and it did the trick on my Z712. I'll only use IS for long shots with lots of zoom. Thanks a heap!