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About Sigma

The dedicated 2x APO Teleconverter features a 6 element/5 group optical design, and it is specifically designed for use with longer telephoto and telezoom lenses.

The high performance optical characteristics of these teleconverters maintain the optical performance of the compatible lenses with which they can be used.

Sigma APO Tele Converter 1.4x and 2x are dedicated Tele Converter lenses, which should be used only with the listed lenses.
The 2X Convertor will fit the following lenses 180mm f/3.5 APO MACRO EX HSM - MF
300mm f/2.8 APO EX HSM - AF

300mm f/4.0 APO MACRO - MF
400mm f/5.6 APO MACRO /HSM - MF
500mm f/4.5 APO EX HSM - MF
800mm f/ 5.6 EX HSM - MF
70-200mm f/2.8 EX HSM - AF
70-210mm f/2.8 - MF
50-500mm f/4-6.3 APO - MF
100-300mm f/4 EX HSM - MF
120-300mm f/2.8 EX APO - AF
300-800mm f/5.6 EX APO - MF
Will also fit the following Orginal Canon EF Lenses
200mm f2.8L USM - AF
300mm f2.8L USM - AF
300mm f4.0L IS - MF
400mm f2.8L USM - AF
400mm f5.6L USM - MF
500mm f4.5L USM - MF
600mm f/4L - MF
70-200mm f2.8L USM - AF

On the lists, the lenses marked "AF" will retain auto focus operation when used with a Tele Converter. The lenses marked "MF can only be used for manual focus.

Please refer to the manufacturers Teleconverer Matching List for an updated compatability chart.
http://www.sigma-photo.co.jp/english/acc/condaitr.htm

Summary of Customer Reviews

Customers most agreed on the following attributes:
Pros:
Durable (7),Easy to use (7),Improves function (7)
Best Uses:
Wildlife (9),Action shots (3)
Reviewer Profile:
Photo enthusiast (4),Semi-pro photographer (4)

Sigma Specifications

Construction
5 Groups /6 Elements
Dimensions (Length x Diameter)
68 x 45.3mm / 2.6 x 1.78"
Weight
234g / 8.3oz.

Reviews about this item

Review Snapshot®

 
4.4

(based on 11 reviews)

100%

of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars

     

    (7)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

Most Liked Positive Review

 

A great value!

I bought this product because there are times when my 200mm lens just isn't enough but I couldn't afford a bigger lens at this time. I knew that my f/2.8 would become an f/5.6 and I would lose some speed but that is okay because I will only be using the converter in the daylight. Overall I had a good experience the first time I used it. I shot a motorsports event and the only downfall was sluggish focusing. It performed well if the focus stayed about the same, but when the camera loses its fo...

View full Review

I bought this product because there are times when my 200mm lens just isn't enough but I couldn't afford a bigger lens at this time. I knew that my f/2.8 would become an f/5.6 and I would lose some speed but that is okay because I will only be using the converter in the daylight. Overall I had a good experience the first time I used it. I shot a motorsports event and the only downfall was sluggish focusing. It performed well if the focus stayed about the same, but when the camera loses its focus it takes a long time to come back in. I was happy with the images I got with it and it lived up to my expectations.

VS

Most Liked Negative Review

 

Bigger is not always better

I use a Canon 7D with the Sigma 70-200 f2.8 lens and a Sigma 1.4X tele-converter and love it. It is almost always razor sharp and so I thought that the 2.0X tele-converter would also be very sharp. I was very disappointed with it. I knew it would change the f2.8 to f5.6, but I was not prepared for the degradation in auto-focus accuracy.

Reviewed by 11 customers

 
1.0

Bigger is not always better

By

from Livingston, TX  -  Photography Student

I use a Canon 7D with the Sigma 70-200 f2.8 lens and a Sigma 1.4X tele-converter and love it. It is almost always razor sharp and so I thought that the 2.0X tele-converter would also be very sharp. I was very disappointed with it. I knew it would change the f2.8 to f5.6, but I was not prepared for the degradation in auto-focus accuracy.

 
5.0

Great way to get to 400 mm!

By

from Upstate, SC  -  Photo Enthusiast

I use this tele-converter on my Sigma 70-200 f/2.8 OS lens. It's a great way to get to 400 mm, even if the apperture is sacrificed to f/5.6. The autofocus is fast and consistent. Make double sure to check and make sure this converter is compatible with your lens, as it isn't compatible with all lenses.

 
5.0

Great product

By

from Uniontown, Ohio  -  Semi-pro Photographer

I really like it paired with my Canon 70-200 f2.8L lens. I've been able to get close to birds and get some great shots. It does add weight to the lens so a tripod is a must. Less expensive than the Canon and works great.

 
5.0

Better than Canon?

By

from South Louisiana  -  Photo Enthusiast

I had been using a Canon 2x III Extender with my Sigma 120-300 2.8 OS (Also from Adorama) mounted on a Canon 7d for about about ten months and was never really completely satisfied with the sharpness of my shots. The sharpness didn't compare with the shots that another photographer, who used the same lens, produced. He wrote that he used a Sigma 2x teleconverter with the Sigma zoom lens. I decided to buy a Sigma 2x to see if it would make a difference. Shortly after I received it I tested it against the Canon 2x III. What I found was that shots with the Sigma 120-300 f2.8 OS combined with the less expensive Sigma 2x was noticeably sharper than the Canon 2x. I believe I've found a winning combination.

 
4.0

Good for what I wanted!

By

from Enid, Ok  -  Photo Enthusiast

I use this with my Sigma 70-200mm F2.8 lens to double the focal length for wildlife shots and barns I can't get close to because of trespassing issues! It gives me a long focal length and a feast F5.6 aperture to get shots without buying a much more expensive and cumbersome lens! Worth the money for what I do! I can even still hand hold for a lot of shots!

 
5.0

Much better than non digital version

By

from Randolph,Ohio  -  Semi-pro Photographer

I found that I get sharper images than I did with non DG version.

(1 of 1 customers found this review helpful)

 
5.0

Glad I traded up to the EX DG model

By

from Randolph,Ohio  -  Semi-pro Photographer

I traded my old non digital one to the EX DG model. It is sharper and I can actually focus better with this model. I use it with my Sigm APO 50-500mm DG lens .

 
5.0

Good In Bright Light

By

from Wasca, Mn  -  Casual Photographer

Drops the amount of light into the camera, but the extra range makes it worth it most of the time.

(2 of 2 customers found this review helpful)

 
5.0

Great Way To Get That Extra Reach!

By

from Miami, FL  -  Semi-pro Photographer

I recently purchased this teleconverter along with SIGMA'S 70-200 f2.8 OS lens and am very pleased with the added reach. Buy using them together, I have the flexibility of doubling my focal range to 140-400mm while maintaining a f-stop of 5.6 and the tack sharpness and consistent focus I am accustomed to. It's nice to have flexibility without carrying a second lens for those distant shots! (Please select this teleconverter carefully, as it does not work with all SIGMA lenses).

(0 of 1 customers found this review helpful)

 
4.0

I am please with the preformance

By

from minnesota  -  Photo Enthusiast

I am please with the functionality of this product. It would be nice if it would allow for Auto Focusing but that is not a show stopper in my opinion

Q&A

Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Why Did You Choose This?
JAMES K  This extender is desighned to work with my DG Sigma 50-500mm 1:4.5- 6.3 APO HSM lens. It does a great job. JIm K.
Mike M  Will this converter work with the Sigma 50-500mm 1:4-5:6.3 OS Lens?
JAMES K  I am using This extender with my EOS Canon 50 D and a Sigma DG 50-500mm 1:4.5 - 6.3 APO HSM . I find it to be sharper with the DG series lens than my old non DG extender which I upgraded to this extender. I photograph a lot of Eagle nest which usually have a lot of sky with excessive backlight. The non DG extender gave some reflected light in my shots . I am shooting at 400yds . I also feel that even though you have to manual focus that I get sharper shots with this extender. Sigma has a chart on their web site that shows it to be made for use with the DG 50-500mm lens. Mike dose not say if he is using the DG model lens or the earlier one . I used the earlier model lens with film but upgraded two years ago when I went to DG. Hope this helps . Jim K.
frank d  will it work on a canon 6d and a canon 100mm-400mm lens ?
SALVATORE C  Yes it will physically work. The question is 'how fussy are you'? There we be a slight degradation in your images when you insert a 2X with a zoom lens. But, you will get 200-800mm worth of a shot.
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