Amazon.com Product Description
The Sigma APO Teleconverter 2x EX DG for Nikon Digital SLR Cameras is a dedicated APO teleconverter that can be mounted between select lenses and the camera body to increase the focal length by the power of 2. The multi-layer coating reduces flare and ghosting, which is a common problem with digital cameras. The lens also offers maximum magnification without any variation in the minimum focusing distance. Compact and lightweight, this teleconverter can convert your lenses into longer focal-length lenses, so you don't have to do a lot of unnecessary footwork. A case for the lens is included.
Customer Reviews:
Sigma 2X EX DG APO Teleconverter for Nikon AF Cameras.......2007-02-17
After reading the two reviews above, I was somewhat baffled. If you do any research on this product, you will find it clearly is made only for use with Sigma lenses, not Nikon lenses. The instruction manual that comes with the converter even lists which specific Sigma lenses to use. If you want a converter for Nikon lenses, buy the Nikon TC-20E (retails for more than twice the Sigma). Of course the quality of this product is poor when using a Nikon lens! I have a Sigma 70-200 zoom and it works beautifully; it is well worth the price.
Loss of Quality / Lack of Focus.......2007-02-11
I bought this converter to use with my Nikon ED AF Nikkor 80-200mm 1:2.8 D lens on my Nikon D80. It fits the lens, and seems to work, at least for metering and manual focus, but the resulting images aren't usable-- or at least aren't any more usable than without the converter. My test shoots have been with a sturdy tripod in broad daylight, around f8 and 1/640th (so, plenty of light). I varied the aperture from 11 down to 3.2 (changing the speed accordingly). In taking pictures of a still subject, where I have achieved excellent focus through the viewfinder, the resulting images are very noticeably out of focus.
I played with focusing closer or farther, compared with dead on, and none of these produced an image that was clearly enough in focus to be worthwhile. If I compare the images taken without the teleconverter at 200mm with images taken with the converter (400mm), the result is a similar amount of clarity. In other words, if I crop and the 200mm photos and compare them to ones taken with the teleconverter, I've got just about the same clarity. So, the upshot is, don't get this teleconverter if you are looking to get closer and retain clarity in your images.
only works with very select lens'.......2006-09-06
i bought this item to extend my shooting range on my nikon d100 - the longest lens i have is a 300mm. the 2X converter didn't fit my nikkor 300mm, my tamron 28-80mm or my nikon 105.
Product Description
Expand your Macro world with Sigma EX Apo Tele-Converters. By using the 2x EX Apo Tele-Converter, you can increase the magnification to up to 2:1 (twice life-size) or, retain same life-size reproduction at an even greater working distance, great for photographing difficult subjects like butterflies or small animals, which can be difficult to approach.
Amazon.com Product Description
The Sigma 2.0x APO Teleconverter lens features a high performance optical design with six elements in five groups. It is optimized for use with long telephoto and telezoom lenses, and is ideally suited for use with the 70-200mm f2.8 APO EX HSM zoom lens. Since it uses 10-pin electrical interfaces, there is no loss of autofocusing speed when these teleconverters are used with compatible HSM type lenses. This model is dedicated to Nikon AF SLR cameras.
Customer Reviews:
INCOMPATIBLE, INCOMPATIBLE, INCOMPATIBLE! Ugh!.......2003-01-16
See the excellent review below which lists the pitiful handful of Sigma lenses that this teleconverter is compatible with. I wish I'd read it before I ordered it (I had to return it after opening it, the list is only INSIDE the booklet*). I have several wonderful Sigma lenses, but none are on that list, and the ones on that list would duplicate what I have, so I have no intention of bying one of the few lenses this teleconverter could work with. *Also inside the booklet is a warning that trying to use the lens with any lens not on the list may damage both the converter and the lens. Well, yeah, a quick glance shows that they used the standard connecting bayonet at only one end (the camera end) and used some strange lens-specific screw mount at the other end. And the possible reason: My Nikon camera body has plenty of space behind the bayonet mount in case the lens needs to extand back a little, but this teleconverter extends FORWARD beyond its front so only a lens with plenty of space "in front of" the bayonet mount (ie, at the lens' camera end) would be able to mate with this. So it looks like they have to specially design lenses just to be compatible with this odd teleconverter, and that would explain why the list is so short.
Buyer Beware!.......2002-04-18
This converter not only work only on Sigma Lenses - BUT CERTAIN SIGMA LENSES!
The converter will work in MF mode only, unless noted, on the following APO lenses:
Macro 180mm f3.5 EX IF HSM
300mm F2.8
300mm F2.8 EX HSM (AF)
Tele Macro 300mm F4
Tele Macro 400 F5.6
500mm F4.5
500mm f4.5 EX HSM
800 F5.6
800 F5.6 EX HSM
1000mm F8
50-500mm F4-6.3 EX RF HSM
70-200mm F2.8 EX HSM (AF)
70-210mm F2.8
This has really turned me off from Sigma, as this IMPORTANT information is NOT listed anywhere!
Great teleconverter........2002-01-29
This 2X teleconverter is a great addition to any fast Sigma lens. I use mine with my Sigma 70-200 f/2.8 HSM. It is sharp, well made, and a relative bargain. I recently used it to shoot at Road Atlanta and was very impressed with the results.
Of course, it is not designed to use with Nikon lenses, only Sigma lenses on Nikon bodies! And that job it does very well.
Excellent teleconverter.......2002-01-25
This teleconverter is an excellent companion to Sigma's 70-200 2.8 or 100-300 2.8 lenses. It allows HSM and all electronic functions to work and, from my use on the 70-200, it has very little effect on sharpness.
Of course, it DOES NOT work with Nikon lenses, but then again it was never designed to. If you want a converter for Nikon lenses, buy a Nikon converter.
Becasue you lose two stops with this converter, I recommend trying the Sigma 1.4x converter also.
Sigma 2.0X Teleconverter.......2001-10-17
Although the teleconverter fit on my Nikon camera, my Nikon compatable lenses would not fit on the teleconverter, thereby rendering it nonfunctional.
Product Description
Built to Polycom's high standards of quality and usability, the SoundPoint IP 301 offers businesses a cost-effective choice for their IP communication needs. Being tightly integrated with IP Telephony Technology Partners' solutions, the Polycom SoundPoint IP 301 supports core enterprise functionality. The Polycom SoundPoint IP 301 provides an easy transition from traditional PBX features and functionality into the world of Voice over IP. The SoundPoint IP 301 has an intuitive user interface offering one button access to telephony features through dedicated hard keys and context sensitive soft keys, a two-port 10/100 Ethernet switch, and an information-rich LCD display that delivers content for messaging, call information, directory access, and applications. The SoundPoint IP 301 offers excellent voice quality both when used with a handset and in a headset mode, thus enhancing the productivity of your business phone calls, because you spend less time trying to understand what other people are saying, and more time communicating with them.With integrated video, voice, data, and Web capabilities, Polycom offers the only solution that gives you an easy way to connect, conference, and collaborate any way you want. It is Polycom's commitment to making distance communications as natural and interactive as being there. Work faster, smarter, and better with the SoundPoint IP 301 and Polycom's integrated communication solutions.
Product Description
Built to Polycom's high standards of quality and usability, the SoundPoint IP 301 offers businesses a cost-effective choice for their IP communication needs. Being tightly integrated with IP Telephony Technology Partners' solutions, the Polycom SoundPoint IP 301 supports core enterprise functionality. The Polycom SoundPoint IP 301 provides an easy transition from traditional PBX features and functionality into the world of Voice over IP. The SoundPoint IP 301 has an intuitive user interface offering one button access to telephony features through dedicated hard keys and context sensitive soft keys, a two-port 10/100 Ethernet switch, and an information-rich LCD display that delivers content for messaging, call information, directory access, and applications. The SoundPoint IP 301 offers excellent voice quality both when used with a handset and in a headset mode, thus enhancing the productivity of your business phone calls, because you spend less time trying to understand what other people are saying, and more time communicating with them.With integrated video, voice, data, and Web capabilities, Polycom offers the only solution that gives you an easy way to connect, conference, and collaborate any way you want. It is Polycom's commitment to making distance communications as natural and interactive as being there. Work faster, smarter, and better with the SoundPoint IP 301 and Polycom's integrated communication solutions.
Product Description
Built to Polycom's high standards of quality and usability, the SoundPoint IP 301 offers businesses a cost-effective choice for their IP communication needs. Being tightly integrated with IP Telephony Technology Partners' solutions, the Polycom SoundPoint IP 301 supports core enterprise functionality. The Polycom SoundPoint IP 301 provides an easy transition from traditional PBX features and functionality into the world of Voice over IP. The SoundPoint IP 301 has an intuitive user interface offering one button access to telephony features through dedicated hard keys and context sensitive soft keys, a two-port 10/100 Ethernet switch, and an information-rich LCD display that delivers content for messaging, call information, directory access, and applications. The SoundPoint IP 301 offers excellent voice quality both when used with a handset and in a headset mode, thus enhancing the productivity of your business phone calls, because you spend less time trying to understand what other people are saying, and more time communicating with them.With integrated video, voice, data, and Web capabilities, Polycom offers the only solution that gives you an easy way to connect, conference, and collaborate any way you want. It is Polycom's commitment to making distance communications as natural and interactive as being there. Work faster, smarter, and better with the SoundPoint IP 301 and Polycom's integrated communication solutions.
Product Description
Built to Polycom's high standards of quality and usability, the SoundPoint IP 301 offers businesses a cost-effective choice for their IP communication needs. Being tightly integrated with IP Telephony Technology Partners' solutions, the Polycom SoundPoint IP 301 supports core enterprise functionality. The Polycom SoundPoint IP 301 provides an easy transition from traditional PBX features and functionality into the world of Voice over IP. The SoundPoint IP 301 has an intuitive user interface offering one button access to telephony features through dedicated hard keys and context sensitive soft keys, a two-port 10/100 Ethernet switch, and an information-rich LCD display that delivers content for messaging, call information, directory access, and applications. The SoundPoint IP 301 offers excellent voice quality both when used with a handset and in a headset mode, thus enhancing the productivity of your business phone calls, because you spend less time trying to understand what other people are saying, and more time communicating with them.With integrated video, voice, data, and Web capabilities, Polycom offers the only solution that gives you an easy way to connect, conference, and collaborate any way you want. It is Polycom's commitment to making distance communications as natural and interactive as being there. Work faster, smarter, and better with the SoundPoint IP 301 and Polycom's integrated communication solutions.
Product Description
CO LINE CARD, 4 CIRCUIT
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Sigma
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Sigma 120-300mm f/2.8 EX DG IF HSM APO Telephoto Zoom Lens for Nikon SLR Cameras
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