Nikon TC-14E III AF-S Teleconverter for Camera

Product Information

Falloff of illumination towards the corners of the frame is noticeably reduced with the converter in place. Without the converter, the corners of the frame are 2.31 stops darker than the image centre at 200mm and maximum aperture. With the converter this is reduced to 1.75 stops. For example, the Nikon 300mm f/4E PF ED has an impressive minimum focus distance of 1.4 meters. The 1.7x teleconverter would extend its reach significantly all the way to 510mm. At such close focusing distance, the lens will have its reproduction ratio increased by the same multiplication factor of the teleconverter lens, so it will go from 0.24x to 0.41x with the 1.7x teleconverter. A nice option for occasional macro work for sure! NIKON D800E + 500mm f/4 VR @ 1000mm (2x TC), ISO 200, 1/250, f/13.0 Teleconverters: Impact on AF speed and accuracy depends on the primary lens. Generally, slower f/4 lenses don’t couple well with 1.7x teleconverters. Thanks to its all-metal construction, the Sigma 1.4x teleconverter feels like a very solid lens. Both sides of the mount are metal and there is a red dot on the mount itself, which is what you would use to align the lens and the camera. From the usability perspective, I prefer markings on teleconverter’s barrel instead, like on all Nikkor TCs. It is easier to look at the side of a TC when mounting it, rather than looking for the red dot on the mount. Being about 20% shorter than the Nikon TC-14E II, it is hard to believe that such a small unit could accommodate 5 high-quality optical elements in 3 groups. Yet Sigma managed to do it and the teleconverter does indeed work quite well for its small size. The spring-based single lever on the side of the teleconverter allows to easily detach it from the lens and it seems to be made to last for years. Overall, the teleconverter is built very well. NIKON D3S @ 420mm, ISO 400, 1/800, f/4.0 Autofocus Speed and Accuracy

Frame beautiful shots of subjects you couldn''t quite reach before. The Z TELECONVERTER TC-1.4x extends the focal length range of your mirrorless NIKKOR Z lens by 40 %. Ideal when you need a little more to get the perfect shot. When shooting with the TC-1.4x attached, minimum focus distance remains unchanged.Nikon's Z system has always had pretty poor autofocus performance compared to Canon mirrorless and Sony. While autofocus performance isn't that great with this converter and my Z 400mm f/4.5, it isn't that great without the converter either. D700, D3S pixel pitch 8.42 µm, D850 4.34 µm, Sony Alpha 7Sii 8.32 µm, Sony Alpha 7Riv 3.76 µm, Canon EOS 90D 3.19 µm.

Some have physical limitations, such as a rear element extending too close to the camera mount, while others have optical limitations. Since most teleconverters are specifically designed for professional super-telephoto lenses, most wide-angle, standard, and telephoto lenses are not compatible with them. However, there are exceptions – some macro lenses, such as the Nikon 105mm f/2.8G VR, do work quite well with Nikon teleconverters.

Sharpness

If you look carefully at the full resolution files, you'll see all sorts of weird distortions of the subject, as if you're looking through water to the bottom of a pool. This is exactly the same effect. It's called heat shimmer. Air refracts light differently based on its density, and air's density varies with its temperature. In the real world air is always at different temperatures in different places, and as the air moves around it creates waves the same way. For a more relevant real-world test, I also wanted to look at the Nikon Z 70-200mm f/2.8 at 200mm – since you’ll usually be zoomed in as far as possible when using a TC. First, here’s the bare lens: