It turns out that teleconverters are very brand-specific. Nikon teleconverters are designed to only work well with Nikkor lenses, while Sigma teleconverters are designed to only work well with Sigma lenses. So if you were thinking of buying a Sigma 1.4x teleconverter to be used for a Nikon telephoto or super-telephoto lens – forget about it. Even though the Sigma 1.4x will physically mount on any Nikon telephoto lens that can take teleconverters and it will perform well optically, it will cause all kinds of lens communication and autofocus issues. When SIGMA TELE CONVERTER TC-1401 is attached to cameras that are compatible with AF at F8, it is possible to shoot with AF. In cases where contrast or brightness level of the shooting object is low, it may not focus properly. The U. S. A. warranty card comes from Nikon, Inc., the U. S. A. office; the Japanese headquarters is Nikon Corporation.

Let’s take a look at the sharpness of these two teleconverters in various situations. Teleconverters always lose some degree of sharpness – the question is how much. 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 This lens has no Optical Image Stabilization (OIS, IS or VR (Vibration Reduction)), but does work with any in-camera stabilization your camera or optical stabilization your lens may have.Both models (TC1401 1.4x & TC2001 2x) incorporate SLD (Special Low Dispersion) glass elements that offer excellent aberration correction. It is exceptional for a lens accessory to use one of the best glass materials, yet this is because Sigma is seeking for the best image quality, and it is necessary to meet the new "SGV" standards. It is suitable for professional use since its durable construction is dust and splash-proof. It is compact and light, and provides easy extension of focal range. Teleconverter NIKON Z 9 + NIKKOR Z 100-400mm f/4.5-5.6 VR S + Z TC-2x @ 800mm, ISO 3600, 1/4000, f/11.0 Crop of the image above Sharpness

Your teleconverter must include a U. S. A. warranty card like the one shown above from Nikon, Inc. The U. S. A. office is Nikon, Inc.; the Japanese headquarters is Nikon Corporation. The card should be inside your box. The serial number on the card must match the serial number on the bottom of your teleconverter: I own the Siggy 120-300 OS and both the Siggy and Nikon 1.4 TCs. If you grind the extra tab off the Nikon TC it will fit on the Siggy. I believe it is sharper, but it communicates the wrong f stop and hunts a bit for focus. So Siggy on Siggy and Nikon on Nikon is the TC rule. Why you can trust Digital Camera World Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out how we test. Diameter x length (extension from lens mount)- Approx. 72 mm/2.9 in. (maximum diameter) x 18.5 mm/0.8 in. (distance from camera lens mount flange); overall length 37 mm/1.5 in.These are all shot hand-held as BASIC ★ JPGs; no tripods, NORMAL or FINE JPGs or RAW files were used or needed. Using a teleconverter does not require any specific knowledge. If the coupling is successful, your camera should recognize the lens and behave similarly as when a regular lens is used. You will notice a decrease in maximum aperture, as well as the angle of view. Most cameras should automatically recognize the attached teleconverter and apply multiplication to the focal length automatically, so the metadata should be reflected accurately in EXIF data. Teleconverter Lens Compatibility I wouldn't use this with the Nikon Z 70-200mm f/2.8 VR, which becomes a 100-280mm f/4. Instead I use the Nikon Z 100-400mm f/4.5-5.6 VR all the time. This way I can get to 400mm simply by twisting the zoom ring, no converter needed, and if I need longer than 400mm, then and only then will I use this converter and get to 560mm. I haven't used 70-200mm f/2.8 lenses for a couple of decades now for this practical reason. Likewise, the minimum aperture is a stop smaller. If the lens stops down to f/22, it will stop down to f/32 with this converter.

If you don't have this card, if the card doesn't say "VALID IN THE CONTINENTAL UNITED STATES" or the serial number on the card doesn't match the one on the bottom of your teleconverter exactly, you got ripped off with a gray market version from another country. All legitimate cameras and lenses come with printed warranty cards, even if you prefer to register online. (The serial number on the outside of the box doesn't have to match, but if it doesn't it means you bought from a shady dealer who took cameras lenses out of boxes and then resold these used lenses cameras as new.) Distortion is not very important for most of the sports and wildlife photographers who will be shooting with teleconverters. That said, both of the teleconverters change the distortion characteristics of the lens you’re using. The score in the “features-department” is 2[-]/5[0]/6[+]. The biggest disadvantage when using teleconverters is the reduction in focal ratio by 1 stop for the TC-1.4x and 2 stops for the TC-2.0x. But that is the laws of optics at work – and not the fault of Nikon. The other [-] is the inability to use the new TCs in combination with the FTZ-adapter. Not sure how good the image quality would have been. But Nikon deliberately precluded this combination so we will never know. You may also not like the relatively high price compared to the street price of Nikon’s F-mount TCs. But if the optics are good the teleconverters are worth their money.Lenses compatible with the NikonTele converter TC-14E II, but incompatible with the Nikon AF-S Teleconverter TC-14EIII The Nikon Z 100-400mm f/4.5-5.6 VR S is an excellent lens, but the maximum aperture of f/5.6 is not nearly as forgiving as f/2.8. Also, this lens has good sharpness at 400mm, but not record-setting like the 70-200mm f/2.8 VR S. So, I wanted to see how it fared with both teleconverters. Nikon reserves the right to change the appearance, specifications, and performance of this product at any time and without prior notice.