Sigma 1.4X EX APO Tele-Converter 35mm Converters

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1.4X EX APO Tele-Converter

Dedicated 1.4x APO Teleconverter features a high performance 5 element/3 group optical design, and it is optimized for use with long 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.

User Reviews (6)

Showing 1-6 of 6  
angus blackburn   Professional [Mar 27, 2009]

This teleconverter is poor. It degrades image on prime lenses to a degree where you would only want to use it if it meant getting a shot as a last resort. Movement between camera and teleconverter is terrible. Don't buy it!!!!!

OVERALL
RATING
1
VALUE
RATING
1
Available At:
Doug Andrews   Expert [Jan 16, 2004]
Strength:

Build quality Price

Weakness:

Unacceptable loss of sharpness and contrast when used with my Sigma 400mm lens Too much play in the connections when mounted

Since this is the only teleconvertor I've used, I have no basis for comparison against others. Only used in conjunction with my Sigma 400mm f5.6 lens. This lens is quite sharp and contrasty by itself, but with the 1.4x teleconvertor, sharpness and contrast is noticably degraded. I was prepared to lose about 10% off the sharpness and contrast of the 400mm lens, but actual results seem to indicate greater than 10% loss. Either that or I notice shapness and contrast loss much more than others. Doesn't autofocus with the 400mm lens, but that was taken into consideration when purchasing. There is a too much play in the physical and mechanical connection between the lens, teleconvertor, and camera body, requiring me to be carefull when flexing or panning the combo when mounted on a tripod. Maybe I just got one where quality control slipped up. Only use now as a last resort when getting any shot is better than getting no shot.

Customer Service

N/A

Similar Products Used: None
OVERALL
RATING
2
VALUE
RATING
4
LRothman   Professional [Nov 01, 2003]
Strength:

No loss of autofocus speed No loss of sharpness No loss of contrast in the image it helps to produce. Solid made like a rock

Weakness:

None

A real surprise in that not only was it every bit as sharp a result as the Canon equivalent, but afforded NO loss of focus lock as the Canon is known to do. Sharp edge to edge with on either a 180 APO Sigma macro lens or a 100-300 APO F4 EX HSM lens wide open. No small feat. No noticable difference on or off in sharpness or contrast of the image.

Customer Service

N/A

Similar Products Used: Canon 1.4xII Teleconverter
OVERALL
RATING
5
VALUE
RATING
5
Available At:
R.D. Kenwood   Intermediate [Jan 23, 2001]
Strength:

Superb optical quality (with Nikon 80-200/2.8D and 300/4), tack sharp edge-to-edge.

Quicker AF speed, even with my older non-AF-S lenses, than the older Tamron AF-D 1.4x teleconverter.

Build quality appears very good.

Flare control is very good too; sometimes when you add a tc (with its additional glass surfaces) you can create or compund problems with stray light. Not so with this one.

Weakness:

Not so much a weakness as something to be aware of: this tc is designed for telphoto lenses. So, while it is optimized to deliver outstanding results with big glass, it will not mate with most other lenses, including many telephoto zooms.

The front element and element housing protrudes, making this teleconverter work only with lenses with recessed rear elements - and not all of those at that. For example, the Tamron 70-300/4-5.6 LD has a deeply recessed rear element, but it won't mount. The Sigma teleconverter works well with the Nikkor 300/4 and 80-200/2.8D, providing a superb autofocusing 420/5.6 and 112-280/4. It provides visibly better optical performance than the older model Tamron 1.4x AF-D teleconverter with both of these lenses, and marginally faster AF as well. This is not saying much - AF with the 300/4 + 1.4 EX is leisurely. AF with the 80-200/2.8D + 1.4 EX is adequate for slow-moving subjects and adequate for tracking medium-fast-moving subjects, but not up to finding and locking onto fast-moving subjects. If you need fast AF, you need to pair this teleconverter with the AF-S versions of these lenses. Build quality and optical quality are first-rate; the Nikon 80-200/2.8 + 1.4 EX is sharper (but more-cumbersome) than the very competent Tamron 70-300/4-5.6 LD; the 300/4 + 1.4 EX is shaper than most 400/5.6 primes.

Customer Service

Emailed query was answered quickly.

Similar Products Used: Tamron .4x AF-D tc (fits any lens, not up to the quality of the Sigma .4x EX with the longer glass).

Nikon TC-14b (no AF but *the* standard for optical quality - I think the Sigma 1.4x EX comes very close, though, and adds the convenience of AF).
OVERALL
RATING
5
VALUE
RATING
4
Nick Roberts   Expert [Feb 09, 2001]
Strength:

Superb quality for a converter

Weakness:

Protruding front element

I bought this at the same time as a Sigma EX 70-200 f2.8. They are a great partnership. Optical quality is surprisingly high, and for the crazy price I paid this is an absolute steal, even if I daren't use it with any other lens, because of the protruding front element.

Customer Service

N/A

Similar Products Used: Vivitar 2x and many others
OVERALL
RATING
4
VALUE
RATING
5
Available At:
Bryan Lardizabal   Expert [Apr 22, 2001]
Strength:

Optical quality & build

Weakness:

Autofocus incompatibility w/Nikon lenses

Excellent results for an inexpensive T/C works well on the Nikon 300mm f4 but does not autofocus on my lens. Called Sigma and they state it should only be used with Sigma lenses for reliable autofocus operation... other lenses may not work properly. (This is also clearly spelled out in their instruction manual - watch out for claims by retailers such as B&H who say it will autofocus --- mine does not!!)

Customer Service

Excellent

Similar Products Used: None
OVERALL
RATING
4
VALUE
RATING
4
Showing 1-6 of 6  
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