Sigma 1,4x Teleconverter EX DG APO Nikon Kameraobjektivadapter

This little 1.4x teleconverter offers substantial cost savings over the Canon and Nikon alternatives. For users who only plan on needing increased focal lengths sparingly, the Sigma APO TELE CONVERTER 1.4x EX DG could be a great option.

Bought this to work with a Sigma 70-200mm OS f2.8 and does exactly what it should do. Maybe a tiny loss if IQ but overall not enough for me to worry about.

Bought this to work with a Sigma 70-200mm OS f2.8 and does exactly what it should do. Maybe a tiny loss if IQ but overall not enough for me to worry about.

Attached between my A99/A77 and a Sigma 70-200mm EX DG HSM APO, AF is well maintained and only a pixel peeping loss in sharpness. Impressed.

Attached between my A99\/A77 and a Sigma 70-200mm EX DG HSM APO, AF is well maintained and only a pixel peeping loss in sharpness. Impressed.

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!!!!!

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...

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...

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....

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...