Product Description
This dedicated APO teleconverter can be mounted between select lenses andthe camera body to increase the focal length by the power of 2. It is compatible with the lens autofocus function, depending on the open-aperture F value of the lens being used, and they work with the AE (Automatic Exposure) function, dispensing with complicated exposure calculations. It also offers maximum photography magnification by 2x, without any variation in the minimum focusing distance. Compact and lightweight, this teleconverter converts your lens into longer focal-length lens, so you don't have to do a lot of unnecessary footwork.Using the 2x APO Tele Converter EX decreases the effective aperture by two F-stops.
Amazon.com Product Description
The Sigma APO Teleconverter 2x EX DG for Canon 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 two. 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:
Affordable and quality.......2007-09-11
I've used Canon lenses, Tamron and Sigma. All are fine products. For my money I have found that Sigma works well, without the high cost of Canon.
Currently, I'm using my extender with a Mark III and mainly my f2.8 70-200mm Sigma lense. I'm mainly shooting High School Football games with this combo & my Turbo 2x2. It's working out beautifully! I would highly suggest the Sigma line of lense, esp if you're on a budget.
Sigma APO Teleconverter 2x EX DG for Canon Digital SLR Cameras.......2007-05-29
Not compatable with Cannon lens only select Sigma lens.
i have bad feeling :(.......2007-05-16
i stil waiting this item :(
i'm didn't receved any thing until now !!!!
Amazon.com Product Description
The Sigma APO Teleconverter 2x EX DG for Pentax 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.
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
After nearly 40 years of pioneering new and better ways to capture and portray the ordinary - and extraordinary - Sigma is still creating new avenues of expression with innovative designs and enhancements.
Product Description
The Sigma 2x EX APO Tele Converter (also known as a tele-extender) will multiply the focal length of the existing lens by 2x and will cut back the amount of light by 2 f/stops. For example using a 2x teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. Note: Sigma APO Tele Converter 1.4x and 2x are dedicated teleconverter lenses. Due to the high optical quality of this teleconverter this item will only fit and work with a select list of lenses. Please click here for a compatibility chart of all compatible lenses. 2x EX DG APO Autofocus Teleconverter for Canon EOS. Item Type: Cameras & Photo Gear > Lenses & Accessories > 35mm Teleconverters.
Product Description
Specifications:
Lens construction: 6 elements in 5 groups
Focal length: 2x that of a master lens
Aperture coupling range: F2.8 - F32
Reproduction ratio: 2x that of a master lens
Dimensions: 68.5 × 52mm (2.7in. × 2.05in.)
Weight: 234g (8.3oz.)
Amazon.com Product Description
The Sigma APO Teleconverter 2x EX DG for Minolta 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:
Not for Sony or Minotal Lenses.......2007-06-26
I do not blame Sigma (except for printing the worse instructions I've ever seen), I blame Amazon for not advertising the fact that Sigma Teleconverters are for use with Sigma lenses only. Though the Teleconverter attaches to the a100, neither Sony nor Milolta lenses will attach to it.
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