Canon 2x EF Extender II (Teleconverter) Imported

Comments about Canon 2x EF Extender II (Teleconverter):

I've used this on my canon 70-200 mm f2.8 lens, Though I have only had the lens for a week, the 2 times I have used it so far have been successful. [I shot 2 baseball games [early and mid afternoon, so lighting was not an issue]
The extra zoom was awesome and Surprisingly to me it add virtually no weight [I don't even notice it].

I would like to test it in low light to see how it alters the lens in that situation.

Speed was still quick even with the extender on, but like I said earlier I haven't used it in low light.

images have turned out great.

Comments about Canon 2x EF Extender II (Teleconverter):

I purchased this to attach to my 70-200 lens, to extend the "reach" I haven't really had a chance since I have received it to put it to any real test.

Comments about Canon 2x EF Extender II (Teleconverter):

I use this with my 70-200 Canon lens and have found it doesn't interfere with the IS. Mounted on a tripod the entire setup - lens and extender - render tack sharp images. Handheld, the sharpness is still very acceptable.

Comments about Canon 2x EF Extender II (Teleconverter):

Got this to use with EF 70-200mm f/2.8L IS II lens. Have used it on birds and dragonflies works great.

Comments about Canon 2x EF Extender II (Teleconverter):

I purchased this lens to extend the reach of my 70-200 f2.8L IS, primarily for youth sports. Focus is slower than the 70-200, however I expected this, as well as the compromise in lower light situations. What was unexpected was the inferior sharpness. When working from a tripod (clearly not a viable solution for shooting football) the images are very soft, even when shooting stationary objects. The result is to take an exceptional lens and to render the image quality essentially unusable.

Comments about Canon 2x EF Extender II (Teleconverter):

This is a great tool to get more from your Canon lenses. The image quality is very good and it's easy to use. It is super for nature work due to the light weight compared to bringing along another bigger lense.

Comments about Canon 2x EF Extender II (Teleconverter):

Debated whether to buy this to complement my 70-200 F2.8 IS and decided to pull the trigger before it was sold out. Performance is great and loss of F stop is as stated. Definitely worth the purchase as it's like having a larger lense for much less money (and weight!). This is a big deal for me as I drag my gear on hikes, etc. Focus is somewhat degraded as vibration is tough to eliminate at nearly 500mm with my 7d - even with IS.

Comments about Canon 2x EF Extender II (Teleconverter):

Works wonderfully and provides the extra reach I was looking for. [...]

Comments about Canon 2x EF Extender II (Teleconverter):

I previously used the 1.4x Canon Extender primarily because the 2x Extender was too soft with some edge distortion. FINALLY I'm able to use the 2x. Perhaps only the most discerning of eyes will notice, but I for one see a marked improvement. I use with my 70-200L f2.8 and it's wonderful. I highly recommend the upgrade from previous model.

Comments about Canon 2x EF Extender II (Teleconverter):

The good news: I'm using the EF 2x II with a EF 70-200 f/2.8 IS USM II, which is as sharp a lens as it gets. Image quality is quite good: you just loose a little bit of sharpness and you get chromatic aberration, but nothing to be worried about. Construction is excellent and up to the standards of L-series lenses. All-in-all, it was a great and cheap way to get a 140-400 f/5.6 out of my 70-200 f/2.8 (by the way, Image Stabilization still works).
The bad news: auto-focus is way slower, increasing from a few tenths of a seconds for the bare 70-200 to a second or more with the extender.
My main interest is sports photography, mainly soccer, where action is usually unpredictable (just like in football). This means you definitely need fast auto-focus. The two stops of aperture you loose may also hurt in this application.
However, I didn't buy the EF 2X for sports, but for wildlife, because I needed a longer reach and I was on a budget. Sure, catching a flying eagle is quite difficult, yet with more static subjects (like a roe, a bear, etc.) results may be quite good.
The bottom line: if your main interest is sports or your lens is not very good, just don't buy the EF 2X. On the other hand, if lightning fast autofocus is not your priority and you own an excellent 70-200, the EF 2X is the cheapest way to "buy" a 400 mm.

Comments about Canon 2x EF Extender II (Teleconverter):

Good product, would purchase again. [...]

Comments about Canon 2x EF Extender II (Teleconverter):

Works great at doubling the zoom range, there is a compatibility list for lenses, mostly canon lenses works with it but check first. It works great on my Canon 70-200mm 2.8, combined with it it turns it into a 140-400mm 5.6 lens. Makes it convenient not to have to carry 2 giant lenses in one bag.

Comments about Canon 2x EF Extender II (Teleconverter):

I use it for wild life photography it makes my F4 70-200 IS much more useful, it takes great pictures, in noral light it works great. Great quality pictures and it is a very nice lens to carry around with the two together and with a small belt bottle pack I can use it or not.

Comments about Canon 2x EF Extender II (Teleconverter):

This is a very nice product that I have added into my arsenal. Perfect for that extra reach that is needed without paying an arm and a leg.

Comments about Canon 2x EF Extender II (Teleconverter):

I am going on Safari and wanted to match my 70-200 IS 2.8 L to my 5D. This will give me range that I need. The price was right and it matches perfectly. I love this match.

Comments about Canon 2x EF Extender II (Teleconverter):

I'm using this on a 70-200 to increase reach, primarily for youth outdoor sports. its pretty easy to use. You need to get used to focusing manually quickly and need to use it with a tripod to get clean shots so in that regards, its not ideal for sports. I have not yet tried with a monopod. When you get a clean focus, the extra 200m is great and since I'm shooting outdoors i don't mind shooting at f/8.

Comments about Canon 2x EF Extender II (Teleconverter):

Using this with 70-200 IS 2.8, works perfectly. Image degradation is very acceptable. Happy I could put my hand on version II. Don't thing the 200$ difference for latest version (III) is worth it.

Comments about Canon 2x EF Extender II (Teleconverter):

I use this with my 100-400 L series lens. Most photos are outdoors/wildlife

Comments about Canon 2x EF Extender II (Teleconverter):

I use it with my 70-200mm lens and get close without having to buy a longer lens.

Comments about Canon 2x EF Extender II (Teleconverter):

I have been looking at purchasing this item for a long time for use with my f2.8 70-200 mm "L" image stabilized lens. To me, this accessory seems almost designed solely for use with the 70-200. I plan to use it for nature photography and to take pictures at my daughter's soccer games. I received it a few days ago and have taken a number of pictures (but as soccer season is over that part of the assessment will have to wait until fall!) In any case, it performs as advertised. Focus is a bit slower than with the bare lens and max aperture is lowered as expected. In other words, this lens does NOT suddenly make your $1300 lens into the equivalent of a $5000 lens, of course. If you keep these limitations in mind, this powerful tool is quite useful. Other considerations: The "mark III" model of this has come out - for about double the cost. I suspect this item will be discontinued / out of stock quite soon, so if you want it you may want to act relatively quickly. Be absolutely certain you know your lens(es) are compatible with this device - specs are pretty clear, but most of the negative reviews are regarding compatibility issues. Don't expect the same tack-sharp images you have been spoiled with using the bare lens as image quality is quite good but not excellent. All in all, this is a very useful (and fairly cost effective) addition to my kit.