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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteA teleconverter is worth considering if you need more reach from a compatible telephoto lens and can tolerate a smaller effective maximum aperture. A 1.4x converter adds 40% to focal length and costs about one stop of light; a 2x converter doubles focal length and costs about two stops. The trade-off is useful for some wildlife and sports photography, but fit and performance depend on the exact camera, lens, and converter combination.
What a teleconverter does
A teleconverter mounts between a compatible lens and camera body to increase the lens’s effective focal length. Nikon describes it as a way to increase a lens’s apparent focal length and produce a greater telephoto effect (Nikon: Using Teleconverters).
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For example, a compatible 70–200mm lens gives an approximate 98–280mm range with a 1.4x converter, or 140–400mm with a 2x converter. These are focal-length calculations, not a guarantee that a particular lens accepts either converter.
What you gain—and what you give up
More reach without another long lens
A converter can extend the reach of gear you already own, which may be appealing when photographing distant wildlife or sports and carrying a larger, longer lens is inconvenient. Sony identifies those subjects as intended uses for its FE converters (Sony FE 1.4x Teleconverter SEL14TC; Sony FE 2.0x Teleconverter SEL20TC).
#1 Best Overall
- 5X telephoto use only: Only for phones with a 5x optical telephoto lens; compatible with iPhone 18 Pro Max 18Pro 17 Samsung Galaxy S26 Ultra S25 Xiaomi 15 Ultra Vivo X200 Ultra, and more; not for main or ultra wide cameras; telephoto zoom varies by model
- Real 15x lossless optical zoom: Extends phone telephoto lens from 5x (120mm equivalent) to 15x (360mm equivalent) without digital cropping—retaining clarity and fine details for shooting distant subjects like wildlife, sports, concerts, and portraits
- Multicoated optical system: 12 elements in 6 groups HD optical glass and multilayer coatings minimize glare and distortion while enhancing image sharpness and detail—even at high zoom levels
- 17mm mount + 37mm filter thread: Equipped with a 17mm lens mount for NEEWER phone cages and phone cases; the 37mm front thread supports ND, CPL, and other content creator essential and influencer must have photography filter accessories
- Use with tripod & phone cage: Use a tripod to reduce shake and blur; secure lens with NEEWER 17mm thread cage or case; set max zoom to activate telephoto lens; compatible with iPhone, disable Macro Control and cover extra lenses to stop auto switching
Less light and a smaller effective maximum aperture
Magnification comes with an exposure cost. Sony specifies approximately one stop of light loss for its 1.4x SEL14TC and approximately two stops for its 2x SEL20TC. In practice, the reduced light may mean using a slower shutter speed or raising ISO to maintain exposure. That matters most when the scene is dim or the subject is moving quickly.
The exact autofocus and image-quality result depends on the camera, lens, converter, and shooting conditions. Sony describes performance for its supported combinations, but that does not establish a universal result across brands or lenses. The available manufacturer guidance does not support a single image-quality penalty or a universal claim that one multiplier always produces better images.
Rank #2
- The 2X Teleconverter can make the focal length of all the Canon EF lenses increased to 2 times, Built-in 4 groups, 7 pcs optics, and the exposure factor enlarge approx 4. (equals to 2 aperture).
- Compatible for Canon EF Mount Lens.[Notice:It only compatible with fixed focal length L-series lenses 100mm and over, as well as the EF 70-200mm f/2.8L, EF 70-200mm f/2.8L IS, EF 70-200mm f/4L, and EF 100-400mm f/4.5-5.6L.]
- Support lens Auto Focus function.Outstanding image quality thanks to new optical design and improved AF performance. The focus speed is really fast and can track the subject, and lock the subject flexibly and accurately.
- Lens coatings are optimized to minimize ghosting and flare. With the aperture adjustment lever on the adapter, you can adjust the aperture fast.
- With an upgraded USB firmware interface, it supports USB firmware upgrading, and through subsequent upgrades, the adapter can improve its function, and fix bugs.
Choosing between 1.4x and 2x
| Converter | Focal-length effect | Light loss | Best considered when |
|---|---|---|---|
| 1.4x | Multiplies focal length by 1.4; a 70–200mm lens would become approximately 98–280mm if compatible. | About one stop for Sony’s SEL14TC, according to Sony product information. | You want a moderate reach increase and prefer the smaller stated exposure penalty. |
| 2x | Doubles focal length; a 70–200mm lens would become approximately 140–400mm if compatible. | About two stops for Sony’s SEL20TC, according to Sony product information. | You need substantially more reach and have enough light or exposure flexibility for the larger penalty. |
The example focal lengths are arithmetic illustrations, not verified compatibility recommendations. Sony’s stop-loss figures are product specifications, not independent comparative tests (SEL14TC specifications; SEL20TC specifications).
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Teleconverters are not universal accessories. Mount, physical design, rear-element clearance, and manufacturer-approved combinations all matter; owning a lens and converter from the same brand does not by itself establish that they will work together.
Rank #3
- Compatible with select Nikon NIKKOR Z long telephoto lenses.
- Increases the native reach of compatible lenses by 40%—without any loss of resolution and with outstanding image quality.
- Retains all AF functionality and speed, VR capabilities and minimum focusing distance, with only 1 stop of light loss.
- Can use every focus point of your Z series camera's sensor all the way down to f/11, unprecedented for teleconverters.
- Maintains the close focusing capability of NIKKOR Z lenses while enlarging the reproduction ratio by 1.4x. Durable and dust and drip resistant.
- Identify the exact camera body, lens model, and converter model you plan to use.
- Check the current manufacturer compatibility chart for that precise combination. Nikon provides a model-specific teleconverter compatibility chart; Sony lists compatible lenses for its FE teleconverters.
- Review any body, lens, or firmware qualifications listed by the manufacturer, including notes about autofocus or other functions.
- If the combination is not explicitly supported, do not assume it will physically fit or operate correctly.
For a concrete product example, the Sony FE 1.4x Teleconverter SEL14TC is intended for select compatible lenses, not every Sony lens. Confirm the exact lens and body before ordering (Sony SEL14TC).
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to decide if one is worth it for you
- Start with compatibility: If the exact combination is not approved, the other trade-offs do not matter.
- Estimate the needed reach: Apply the multiplier to the lens’s focal-length range and ask whether the resulting framing solves a real shooting need.
- Account for light and motion: Consider whether the stop loss will force a shutter speed too slow for your subject or an ISO level you find unacceptable.
- Check system-specific performance: Look for manufacturer notes about autofocus and operation for your exact lens and body; do not infer results from a different combination.
- Compare practical alternatives: Cropping avoids adding a converter but does not optically magnify the image. A longer lens may avoid the converter’s light loss but can involve carrying and buying different equipment. The available sources do not establish a universal winner between a converter and cropping.
A teleconverter is most compelling when its reach solves a specific problem, the combination is confirmed compatible, and you can work within the exposure cost. If light is scarce, action is fast, or the supported combination’s performance does not meet your needs, the added magnification may not be worth the compromise.
Quick Recap
Best Value
- ✓【PRODUCT SUPPORT, 3-Year Waranty】— We are committed to providing our customers with an exceptional experience, if you encounter any issues during use, please feel free to let us help you.
- ✓【 Compatible List】 — Only Compatible With Sony FE SEL70-200G2/ FE SEL70-200GM2/ FE SEL70-200GM/ FE SEL100-400GM/ FE SEL200-600G/ FE SEL400-800G/ FE SEL300F28GM/ FE SEL400F28GM/ FE SEL600F40GM/Viltrox 135mm F1.8 LAB FE
- ✓【Extends focal length by 2x】 — The 2.0X teleconverter is a lens accessory that can be mounted between the camera and lens to increase the focal length by up to 2x, making it particularly suitable for users who want to use telephoto lenses for wildlife, sports, etc.
- ✓【Double the focal length】 — The 2.0X teleconverter extends the telephoto focal length without increasing the number of lenses, achieving a balance between increased focal length and high-quality images.
- ✓【Wide compatibility, comparable to original teleconverters】 — The Viltrox 2.0X teleconverter complements the original lens, providing 2.0 times the focal length. It maintains overall image quality and lens autofocus functionality and features a dust- and splash-proof design for reliability in outdoor photography.
Rank #4
- 2x telephoto lens converter: For smartphones with a built in 5x telephoto camera, this converter doubles optical zoom from 5x (120 mm equivalent) to 10x (240 mm equivalent) for distant shooting without digital cropping or image loss
- For 5X telephoto cameras only: Not for main camera; cell phone accessories compatible with Vivo X200 Ultra Xiaomi 15 Ultra Samsung Galaxy S26 S25 Ultra Android iPhone 18 Pro Max 18 Pro 17 16 Pro/Pro Max; select 5X before use if optical zoom is below 5X
- Compact and lightweight: Compared to standard external zoom lenses, this 2x converter is shorter and lighter; it features a 17mm thread for 17mm threaded phone cages, cases, and lens clips; content creator essential photography and filming accessories
- Multicoated optical glass: 7 elements in 5 groups of HD optical glass and multiple nanocoatings reduce glare and distortion, resist water, fingerprints, and scratches, and ensure excellent light transmission; a cleaning cloth is included
- Important note: Different phone brands may require different zoom levels to activate the telephoto lens; compatible with iPhone, apply the included stickers to cover the wide angle lens to prevent lens switching caused by light sensor interference
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
