Yesterday, I mounted the Nikkor 135mm DC f/2 on my Sony NEX 5N and shot a couple of frames. Both images were shot at very very low light, but the high ISO performance of the NEX combined with the f/2 aperture managed to get some decent light to the photos.
As you can see, the images are nothing special, just show how the NEX shoots with a 200mm equivalent f/2 lens. The Nikkor 135mm is a big and fat lens, and on the Sony NEX is really too difficult to handle. When trying to focus, you have to move the ring and at the same time try to hold the body from carrying all this weight. I don’t know how strong the NEX’s mount is, but I don’t want to find it the hard way (by damaging it !!)
My opinion is, that for those large and heavy lenses, you better mount them on the camera body they were created for (in this case, a Nikon DSLR). Unless you have an adaptor with a tripod mount, so that you can place your camera on the tripod without forcing the camera mount to support this weight, I don’t find it practical to shoot with such a large lens on the tiny NEX body. For a fast 135mm prime on my NEX, I will stick to the Leica Elmar 135mm f/4.
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