How does the auto focus perform with this teleconverter?
862456
That would depend on what lens you are using and to some extent your camera body. With a good wide aperture of 2.8 or even f4 it will work great. If you have a variable aperture lens up around 6.3 it could get rather slow.
862457
It works really well. Between my friend and I, we have the Canon 6D and 7D and use it all the time with both. Works perfect with auto focus. This is ALWAYS on my camera!
862458
Tamron's web site will give technical information about the device. However, auto focus works with the converter. It takes some practice (at least for me) to counter the loss of lighting that comes with adding about two inches to the lens. Read the information Tamron offers, google the device for consumer insight and practice with it.
537009
Sorry. Shooting in RAW, though, is always a good idea when you can't afford to lose a shot to over-exposure or other issues.The thing with telecoverters is that it MIGHT have helped but not necessarily so. Some lenses work better with teleconverters than others. For example, my old Tamron 70-300 was probably much worse with a teleconverter than a simple crop. There is also quite a difference between teleconverters and the better generic ones run about $200 and up. The Tamron PRO and Kenko PRO models are the most versatile high quality generic teleconverters. The cheaper generic teleconverters probably aren't worth bothering with and the Sigma and Canon teleconvters ONLY work with a small number of pro level lenses. Sorry. Shooting in RAW, though, is always a good idea when you can't afford to lose a shot to over-exposure or other issues.The thing with telecoverters is that it MIGHT have helped but not necessarily so. Some lenses work better with teleconverters than others. For example, my old Tamron 70-300 was probably much worse with a teleconverter than a simple crop. There is also quite a difference between teleconverters and the better generic ones run about $200 and up. The Tamron PRO and Kenko PRO models are the most versatile high quality generic teleconverters. The... » Read More Sorry. Shooting in RAW, though, is always a good idea when you can't afford to lose a shot to over-exposure or other issues.The thing with telecoverters is that it MIGHT have helped but not necessarily so. Some lenses work better with teleconverters than others. For example, my old Tamron 70-300 was probably much worse with a teleconverter than a simple crop. There is also quite a difference between teleconverters and the better generic ones run about $200 and up. The Tamron PRO and Kenko PRO models are the most versatile high quality generic teleconverters. The cheaper generic teleconverters probably aren't worth bothering with and the Sigma and Canon teleconvters ONLY work with a small number of pro level lenses. « Show Less
591910
I have used a teleconverter on the front of the Sony 50-210 lens, typically at 200mm setting. My TC has a significantly larger diameter front lens, therefore there is no loss of light. It is a 1.7x. Works surprisingly well - on a test target and in the field. Much better than I thought it would. And, you have the benefit of OS in the base 50mm lens. If you decide to purchase one, get a good one = expensive. The cheepos will certainly cause distortion. And yes, these add a few more layers of glass. I really wouldn't go past a 1.7x. It is time for Sony to grind some glass for E-mounts that goes to 300, even 400mm. I have used a teleconverter on the front of the Sony 50-210 lens, typically at 200mm setting. My TC has a significantly larger diameter front lens, therefore there is no loss of light. It is a 1.7x. Works surprisingly well - on a test target and in the field. Much better than I thought it would. And, you have the benefit of OS in the base 50mm lens. If you decide to purchase one, get a good one = expensive. The cheepos will certainly cause distortion. And yes, these add a few more layers of glass. I really wouldn't go past a 1.7x. It is time for Sony to grind some glass for E-mounts that... » Read More I have used a teleconverter on the front of the Sony 50-210 lens, typically at 200mm setting. My TC has a significantly larger diameter front lens, therefore there is no loss of light. It is a 1.7x. Works surprisingly well - on a test target and in the field. Much better than I thought it would. And, you have the benefit of OS in the base 50mm lens. If you decide to purchase one, get a good one = expensive. The cheepos will certainly cause distortion. And yes, these add a few more layers of glass. I really wouldn't go past a 1.7x. It is time for Sony to grind some glass for E-mounts that goes to 300, even 400mm. « Show Less
2138669
The leans does not support any 1.4 or 2x teleconverter, autofocus will not work, the quality of the photo will be very low.....
1726110
Yes, it does auto-focus. I now use it on a micro four-thirds camera which requires that I use an adaptor. This slows the auto-focus.
976835
You need EF mount lenses. EF-S mount lenses will not fit this teleconverter. In general, teleconverters are a bad idea unless you use them with very high quality lenses. The converter will magnify any flaws the lens already has. It would be more cost effective to buy a longer prime lens than trying to use a teleconverter on any lens with a maximium focal length less than 100mm. You would also be better off just cropping your shots from a telephoto lens that has a maximum aperture narrower than f/2.8 or f/4. Since any 2X converter doubles the effective focal length, it also increases the maximum aperture by two stops. An f/4 lens becomes an f/8 lens. An f/5.6 lens becomes an f/11 lens and so on. An inexpensive telephoto lens such as a 70-300mm f/4-5.6 becomes an effective 140-600 f/8-11. Most Canon bodies disable auto focus any time a lens or lens/converter combo with maximum aperture narrower then f/5.6 is mounted. The 1D series wil allow auto focus to function up to f/8.
1875684
Yes - but the amount of light to the lens will be reduced. I don't use it with a teleconverter.
1407503
I have used this for a couple months, and its all auto-focus-- zoom, movies, stills. I have not used a manual focus at all.
2207204
It will autofocus up to 8.0f but not above so this extender will only be useful in manual mode with the 100-400. As the other person stated it will autofocus with the 1.4 extender.
1177284
I read somewhere it does NOT work. I would not recommend this combination anyway fr quality reasons. It is a bad idea to use a converter for a wide-to.tele-zoom. Teleconverters are best for fast lenses (2.0...4.0) and longer focal lenghts (fixed or fast pro telezooms).
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
762747
Hi Pedro - I also have the 18-55 and 55-200 Nikon lenses and have no problem mounting them with the Kenko Pro 300 2X teleconverter. The only drawback is that your autofocus may not be very reliable - but for telephoto shots I almost always use manual focus anyway. Bottom line is, you can safely use this teleconverter with your Nikon lenses.
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.
111525
I do not use auto focusing. Detects motion and fires. No problem so far. Good results. OK for price.
314955
Big issue on using teleconverters is lighting. if you don't have good lighting then no. also the speed of your focus has an impact in performance. slow autofocus and you camera will hunt. I ha d a sigma 70 - 300mm lens and it did ok. but my tamron is so much better. especially with teleconverters. one thing the keep in mind. your f factor with change with these.so an f4 be much higher. hence lighting issues.I have even stacked them with mixed results.I have a nikon D3100 with 2 nikon lens, 18-50mm and 50-200mm, and a tamron 70-300mmand 2 of these teleconverters.
1391989
I use the lens on both my telephoto lens both automatic or manual setting with good results.
1645517
I have the same lens & teleconverter and it works perfectly. Good luck hope you enjoy this setup. Wayne