Sigma 2x EX DG APO Autofocus Teleconverter for Nikon AF

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

Was great in the dessert on our Southwest Vacation.
Attached to the sigma 70mm - 200mm 2.8f
got it up close, with the distances of your subjects in the southwest this converter is a must coupled wit a 200mm lens.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I use the teleconverter on my Sigma 70-200 f2.8 and it works great. I shoot nature and wildlife with it, to get as close as possible.
The clarity and sharpness is excellent. The only thing I find difficult is attaching it to the camera. There is no white dot like my other lens have to match it up to. Maybe I will make my own dot

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I tried it inside and briefly outside. The "Spring" conditions limited my use but the converter seems to fit well. Even in cloudy conditions outside there seems to be little appreciable decline in lens speed. The AF works fairly well too without much slow-down though only singles were experimented with.
More stars should come with more use.
Coupling lens and camera body could be aided by a more distinct white dot.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I use this with a D300/Sigma 120-300 2.8 lens. Love this lens without the TC but the images lose a bit of sharpness. Focus is so painstakingly slow I that I just switch to manual focus. Use of a tripod or monopod is a must. So if you can live with the slow focus & loss of sharpness and have adequate light to shoot in, get it. Otherwise you'll have to spend thousands on a lens that will give you this range without a TC. Considering that, it's worth the price.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I've been using the Sigma 1. 4x for several years with Sigma 150mm f/2.8 macro and the Sigma 100-300mm f/4.0 with excellent results. The image deteriorates a bit but worth it for the 1.4x magnifying.
With the 2x you lose autofocus with both lenses (which I knew beforehand.)
With both lenses the image deteriorates a little more than with the 1.4x. The corners are fatal with the 2x at 300mm on a Nikon D300.

However, the 2x for the 150mm to do macro is excellent. I focus manually anyway with or without extender.

You can stack the 1.4x + 2x with mixed results, but the camera does not recognize the focal length and there are too much deterioration of the image.

Conclusion: If you are looking for a Teleconverter buy a 1.4x. If you already have the 1.4x, get the 2x only if you do macro.

Note: I've read a good review of 2x with the new Sigma 70-200mm f/2.8

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I have taken a motorcycle tour across the U.S. for the past 2 years and used a point and shoot for my pictures. Decided to invest in a DSLR and some good lens. I purchased the Sigma 150-500mm lens and wanted to make it more useful, hence, I purchased the above product. It is great and I have been able to take some beautiful bird shots using the "Manual" focus feature. I would recommend to anyone that wants to "reach out" and take good long range pictures.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

Using the teleconverter for nature and sports photography. This small, easy to attach teleconverter is very convenient - but you must use manual focus. Also, a tri-pod is a must as it difficult to hand hold with a larger lense. It does produce sharp images in the right light. in spite of the drawbacks I'm glad to have this as an addition to my gear.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I use this to double the length of my 150-500 for shooting the stars and wildlife. Sharp focus

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I' ve been used 2x TC with sigma 120-300 in a D300. It's great for Kite Surf, Surf and Windsurf photos. Sigma 120-300 f/2.8 becomes a 240-600mm f/5.6 in a perfect combo that I can follow with full range in f/5.6 at the beach even during cloudy days. The zoom is a little bit slower but always sharp.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

It is very well made and functions better than I expected.To me ,it is quality at a reasonable price.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

good quality images, good sharpness for nature and sports fotography...

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

Wildlife
2x
Degrades image.
I was going to get the 1.4 converter but it was out of stock so I got this.
It is usefull, although you really need to stabalize the the camera and use a tripod & cable realease for best results.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

I use this with my Nikon D40x, and Sigma 50-500mm to take wildlife photos. It needs a very bright day, and manual focus, but brings the subjects much closer.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

A good alternative for those of us who don’t have big bucks to spend on a lens. My expectations were not very high given the fact that all teleconverters take away some light (and a little sharpness). But after getting some shots that otherwise would have been "too far away" I think this was a good purchase. With that said, if you can afford to buy a big expensive lens you will spend less time correcting sharpness in your editing software.

Comments about Sigma 2x EX DG APO Teleconverter for Nikon AF:

does not delay autofocus, great way to increase versatility of lens!