Name: Used Canon Extender EF 2x II (Tele Extender). undefined
Brand: Canon
SKU: US1950266
Price: 204.00 USD
Availability: Discontinued
Rating: 4.32 (53 reviews)

Canon Extender EF 2x II (Tele Extender).

Canon

Adorama

Used

Photography

Lens Accessories

Teleconverters

Canon Teleconverters

Top Rated Gear: Used Canon Extender EF 2x II (Tele Extender). undefined

This extender has been re-designed optically and offers excellent performance with compatible EF lenses (same as the Extender EF 1.4x II). Features a new seven-element design, and same weather-resistant design and anti-reflection internal construction as the new EF 1.4x II. The EF 2x II doubles the focal length of any lens it's mounted to, and reduces its effective aperture by two stops. With the EF 2x II, AF is possible with any EOS body if the lens has an f/2.8 or faster maximum aperture, and compatible Image Stabilization lenses maintain the IS feature when used with any current EOS camera.

Used Canon Extender EF 2x II (Tele Extender). undefined

Doubles the magnification at the cost of two F stops. Must have a fast lens for autofocus to work.

Canon Extender x2

It takes a bit longer to move from my 24-105 to my 70-200+the 2x extender than it might to go to a 100-300 BUT I get more flexibility (70-400) this way.  Auto-focus has not been significantly impacted and the ability to manually focus hasn't changed at all.  Try as I might, I can think of no negatives.  My 5 star rating is made on the assumption that the 2x extender performs as well on other lenses as it does on my 70-200 (non IS).
The buying experience from Adorama was as usual terrific, my only complaint being that I'm forced to take a day off work to be here and sign for the box.  There should be an option at checkout to forgo the security of a signature.

A bargain!

I thought I would use this more than I did.

It works perfectly, so no complaints there. Just remember that it will double your aperture.

Attached to my 70-200 f/2.8 on my 5D ... it became a f/5.6 but did a FANTASTIC job gettin pic's of a full moon.

For stills or someplace that lens 'speed' is not an issue, it's a great way to get a 140-400 out of a 70-200. For fast action ... I'd pass.

Does a great job ... not for me though

I shoot mostly wildlife and birds. I keep the 2.0X and 70-200F2.8L lens mounted on my Canon 50D so it is ready for a target of opportunity in the backyard. One of my wildlife photographer friends uses a 500MM zoom and is continually surprised at the sharpness and detail I get with distant subjects. This combination of camera, lens and extender has exceeded my expectations. The only downside is slow autofocus for birds in flight. 
I do 99.9% of my work handheld (propped against a tree, fence, wall, etc when possible). Yes, I will purchase a 500MM or 600MM when the budget permits.

Excellent Product

Many reviews have stated that the 2x extender degrades image quality, but with my prime Canon 400mm 5.6f USM lens, one can hardly see any degradation at all.  However, the prime lens is super sharp and clear to begin with, which probably makes the difference.  It really pulls things in close at the fraction of the cost of buying a bigger lens.  You do lose autofocus when using bigger lenses with the extender though.  I had also read that one should expect a dark viewfinder when using a 400mm lens and a 2x extender, but I have had no problem with that.  I would however recommend using a monopod or a tripod.  I used to be able to hand-hold the 400mm lens, but adding the 2x extender makes it a little tricky to do so.  Overall, I would definately recommend this product, especially for those who are on a budget.

Awesome Product!

I got this 2X extender for use with my Canon 70-200/f2.8 zoom lens (on a Canon 5D body) and tested it with the zoom at the 200mm setting. I photographed a Photo Lab Index resolution test chart, with the chart filling the viewfinder at the 200 and 400mm focal lengths.

After eliminating the image shake at 400mm by using a tripod and high shutter speeds, I found that the resolution was about 70 lines per millimeter, both with and without the extender on the zoom lens. The resolution was tested one stop down from wide open and was constant across the image from corner to corner. I found only the slightest reduction in contrast with the extender attached to the lens.

This result was much better than I was expecting. Some other brands of extender that I've tested have been so incredibly bad that I never bothered to use them.

Much better than I expected.

I got the 2X extender for use with my Canon 70-200/f2.8 zoom lens and tested it with the zoom at the 200mm setting. I photographed a Photo Lab Index resolution test chart, with the chart filling the viewfinder at the 200 and 400mm focal lengths.

After eliminating the increased image movement at 400mm by using a tripod and high shutter speeds, I found that the resolution was about 70 lines per millimeter, both with and without the extender on the zoom lens. The resolution was tested one stop down from wide open and was constant from corner to corner. I found only the slightest reduction in contrast with the extender attached. 

This result was much better that I was expecting. Some other brands have tested os bad that I never bothered to use them.

Works much better than I expected.

I use this with my 70-200 F2.8 is L series lens. 7d Canon camera. I was debating back and forth between the 1.4 vs 2. In the end I went for the 2 as I felt I needed distance most. Aside from the 2f stops I notice a slower focus especially when adding it to the 2.8 lens. It's also adds weight especially to the IS L series lens. For the price it's a nice add on as well as the ease of carrying. I've not tried the 1.4 maybe in the future for another option.

Great addition!

I mount this on my Canon 50D and 70-200 f2.8L lens. The EF 2X Extender was my low cost alternative to a longer lens. I shoot all my wildlife and birds handheld, bracing against a tree, fence, wall, etc when possible. One of my camera buddies who shoots with a 500mm is impressed with the results I get. I do plan on eventually purchasing a longer lens.

My only complaint is the slow and searching autofocus, especially for birds in flight. I frequently have to manually focus, which is why I gave it a 4 star rating instead of 5 star.

Photograph quality is excellent through the entire range. I donate many photographs to charity fundraisers and they have been very popular and sold well.

For the sake of helpfulness, I will be covering 3 important sections in this review:

1) How I use it:
- I use this extender with my Canon EF 70-200mm f/2.8L USM lens, mounted onto my Canon EOS 5D Mark II.
- I have used this to extend my range for events such as graduations and sports, as well as for nature/wildlife photography.

2) What's great about it:
- It's solidly built, lightwieght, and easy to carry.
- It doubles your focal length for an extremely lengthy range.
- It's a cheaper alternative than investing in an expensive supertelephoto lens.

3) What's not so great about it:
- You have to sacrifice reducing your maximum aperture from f/2.8 to f/5.6 in order to double your focal length with this extender. (assuming you're also using a f/2.8 lens)

Overall, when you're not too worried about light or about shooting at f/5.6 or higher and you want a super telephoto range - this is an amazing solution.

The Canon Extender adds a whopping 2X multiplication to my Canon EF 100-400mm f/4.5-5.6 L IS USM lens so I can really reach far.  What I was not aware of, the lens becomes a manual focus lens when the extender is added.  I was aware of the loss of 2 f-stops and the limited applicability.  The Extender can only be added to a few lenses so be aware this extender does Not work with all lenses.  Even with these stated drawbacks, it sure beats spending $10,000+ on an 800mm lens.  I shot some awesome shots out here in Hawaii using the extender.  I used it to shoot the big wave surfers of North Shore, whales breaching the south shores of Honolulu, and some close shots of the beautiful Hawaiian landscape.  I am an amateur photographer so I feel this is the best affordable option for the average photographer.

I added a photo I shot using the extender (reduced size).

Great Extender

I was disappointed in the image quality using the 2x tele extender even though the reviews I have read claim the new optics of version 2 significantly improved the adapter. With my 400 f/5.6 it is, of course, this lens rendered a manual focus lens. I find the image is definitely not sharp compared to the sharpness of the 400 mm f/5.6 lens without the extender. I found similar results with a Canon 70-200 mm f/2.8 lens. For the cost I certainly expected better performance. I would have see more data from other users to be persuaded to keep the adapter or recommend it. Perhaps, the performance found is the best that one can expect.  If that is the case then I certainly do not recommend 2x converters.  .

Expensive teleconverter

The 2.0x tele-extender was a lousy product. I know others who like it. Every test shot I took with it (using top quality 500mm f4.0 and 70-200 F2.8 lenses) was slow to focus and the results were either out of focus or noisy images. I would never buy one again. I returned it and exchanged it for the Canon 1.4x which I rate 5 stars.

Maybe I bought a lemon?

I reviewed a lot of doublers and this is a solid performer.  The limitation on autofocus and compatibility with other lense manufacturers may be a problem as I use it more.

To be proven

This extender is made by Canon and it complements certain Canon lenses. it is important to check to see if it can be used on whatever lens you plan to extend. If it is compatible, it can double your range. However, it is important to note that the light that reaches your sensor is now diminished so your   
F stop range will have decreased. But with these notations taken into account, you will surely be pleased by the performance of the extender.

Great Way to get Yourself Closer

Use with the Canon 300 mm f/2.8 IS USM - cost effective way to achieve 600 mm at reasonable speed without the $8000+ cost - the 300 mm f/2.8 is a super sharp lens so there is little loss in image quality by adding the extender - auto focus slows down enough to notice but not enough to be a problem, I'm happy with my purchase.

Affortable reach

I use this whenever my 70-200mm f2.8L II just isn't long enough.  Autofocus does hunt a bit sometimes but given enough light it's never that big of an issue.

Works great as advertised

I used this with my 70-200mm f2.8L IS lens to photograph Eagles and Hawks in the Carson Valley,  plus the Reno Air Show.  The 2X extender gives me a light weight alternative to a big lens with excellent optical quality.

I am very happy with gaining 2X reach for the birds (feathered and jet powered).  I used it with Canon 5D and 40D.  (Note,  the reviewer with limited Depth of Field complaint needs to learn that LESS depth of field is ALWAYS the case with LONGER focal length,  not the fault of the 2X.) 

A friend shooting indoors had trouble with the 2 stops loss,  it is harder to focus in a low light condition.  But outdoors I have no troubles.  

I find the auto-focus and image stabilization work fine on the IS 70-200 f2.8 'L' lens.   Auto-Focus (with AI-servo) follows the big birds in flight also.

Excellent for helping 70-200

I use the 2x extender with my 500mm f4 Canon and the 1Dmk IV to reach out and capture images of shy birds.  Image quality is still great with this combo. It enables me to get usable pics that I would never get without it.

Gets the job done

Used with the Canon 300mm IS f2.8 lens gives me great results!

A great compliment to my lens

If I only had one lens that I could shoot with it would be the Canon 70-200 L with OS lens.  If I could add one component to the equation, it would have to be this one.  When it says the Canon Extender EF 2x II will double the output with only one F stop loss, it means it.  I have been able to shoot much further with this devise than I thought I would be able to.

Works well where it works.

I have used the 2x behind both my 70-200mm f/2.8 IS USM and 300mm f/2.8 IS USM for daytime high school football on both my 5DmkII and 20D.  It gives the added reach for the 70-200 to make it useful in that scenario from the sidelines.  On the 300mm, players less than 30 yards away are too close.  Giving up two full stops (f/5.6 min) means at ISO 200 in Av at f/5.6, most of the frames snap off at 1/1250+ during the day.  Great addition to the bag - a must-have.

Make more of what you have

The depth of field is so shallow it is next to impossible to make sharp pictures. After working with it for about 2 weeks I returned it.

Not a useful product

I use the extender to increase my telephoto range for a 70 - 200 mm lense.  My lense does not allow me to use the auto focus with the extender so I am slower with it than without.  However, manual focus works well with the extender.  I'll have to upgrade to a faster lense sometime from a f4 to a 2.8 so I can use auto focus.

Canon Extender EF 2x II

Only fits a few lenses.  No where in the literature did this extender say it only fits a couple of lenses in the Canon arsenal.  Bad marketing on Canon's part.  Check carefully with Canon's web site prior to purchase to make sure you have a lens that will fit it.  So this product is unrated as I was not able to use it.

Not fitted for all lenses

Everything I had hoped

Don't but the generic extenders. Pay the price now or you'll just be wasting your $.

Practical addition.

We use it primarily for wildlife - it brings them close for greater detail.

Excellent product!

Cheaper and lighter than having multiple lenses to cover the same focal length.  Dosen't work with many lenses so be sure and check the applicable list before you purchase.

Simple and cheap solution

I use this extender with Canon 5d and 70mm-200mm L IS 2.8 and a tripod to get 400mm at f5.6.  The extender barely degrades the sharpness of this otherwise terrific lens, and is great for getting details at up to thousands of yards.