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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Thursday, Jan 1
Features
- 2.0x tele converter that maintains full G Master performance, Currently compatible with SEL70200GM, SEL100400GM, SEL400F28GM
- Impressive optical performance with aspherical lens element, Precision engineered for versatility and reliability
- Dust and moisture resistant design for maximum reliability
- Lens Groups / Elements -5/8
Description
Extend your range by 2.0x and retain full optical quality and operability, offering outstanding performance for sports of wildlife photography in a compact, lightweight kit. Multiplies focal length by 2.0x with only a 2-stops light loss. Maintain the full image quality and AF performance of the lens, and feature a dust and moisture resistant design for maximum reliability when shooting outdoors.
Brand: Sony
Focal Length Description: 2x
Lens Type: Teleconverter
Compatible Mountings: Sony FE
Camera Lens Description: 35 millimeters
Product Dimensions: 4.09 x 3.43 x 4.69 inches
Item Weight: 14.1 ounces
Item model number: SEL20TC
Is Discontinued By Manufacturer: No
Date First Available: July 11, 2016
Manufacturer: SOAB9
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jan 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This worked really well for what I was wanting. I have been able to get great closeups when I am out birding. I use this with my Sony FE 200-600mm lens and it gets good pics. Low lighting is not the best, but that could be said for that lens in general.
Reviewed in the United States on October 3, 2025 by SeñorSwampDonkey
I guess if you absolutely need super fast, super bright, super long zoom... this won't solve your problem. However, when I use this on my 2.8 70-200 GMii, the results are fantastic. Obviously, halving the aperture is a compromise and can impact the AF unless in bright conditions, but for my use cases, it is acceptable. I do notice the predictable softening and vignetting in the corners but again, I don't expect 400mm 2.8 prime results... and I didn't drop $13K. So, if you have reasonable expectations and understand the implications, I think this is an amazing solution.
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Reviewed in the United States on August 19, 2025 by Richard S Tirendi
As many others have written, paired this with my 70-210 GM2 to avoid buying another and more expensive lens. Recently resurrected a long-lost love of photography, and this allowed me to get some good shots of the April 2024 eclipse. I have also used this combination (and the R5 mirrorless) to get some good shots of the full moon.
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Reviewed in the United States on June 15, 2024 by Concerned citizen
I was excited to add this to my 200-600mm lens, and it did the job as described. But I've found myself using the lens more without it due to the loss in image quality.
Reviewed in the United States on August 5, 2025 by Nathan
I had a lot of reservations on getting this 2x teleconverter as I have seen a lot of reports of significant optical quality loss and blurry images on the 100-400gm. I ordered it anyways to test for myself, knowing that I could just return it if the quality was not up to par. The 2x TC turns the 100-400mm to a 200-800mm. In APS-C crop mode on a full-frame Sony you get a 300mm-1200mm lens! Most of these shots I've included are at the far end of that range and excellent quality. I think the reports specific to the moon being blurry with the 2x TC relates to the fact that punched in to that extreme length there are a lot more variables at play. For one you need a really stable tripod and should manually focus on the moon to ensure it is crispy sharp. The rest of the photos i've included were using autofocus on a Sony a7c or a Sony a7s iii.
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Reviewed in the United States on November 24, 2020 by Placeholder Placeholder
Using this 2x converter with the Sony a7rII and 70-200mm 2.8 lens to give me 400mm for birding and other activities. It does pretty good if you reduce the aperture to f/11 or smaller (total aperture of the lens and tele-converter). Significant detail is lost shooting wide open. At f/11, pixel peeping shows a slight loss in sharpness with a bit more chromatic aberration compared to without the tele-converter, but the tele-converter does (subjectively) provide results that are slightly better than a 2x up-scaled image at the same aperture, so it does seem to work as intended. Unfortunately, loss of photons at f/11 makes low light shooting much more impractical, and it limits wildlife shooting to bright conditions. In low light conditions, it's better to shoot closer to wide open without it and upscale 2x post-processing if you need to. I would have loved it if Sony spent more time engineering this converter to shoot better wide open, and ignore some of the smaller apertures, since that's where most people will be using these lenses. I have not tested yet with the 100-400 lens yet, and have not had a chance to compare it to the 1.4x converter. Don't have pockets deep enough to get everything at once. I'll update the review when I do. Considering the price, I question its overall value, but this seems to always be the consensus for 2x converters for all camera manufacturers. UDATE 2/23/21 - I picked up the 200-600mm f/5.6-6.3 G lens earlier this year, and the 2x teleconverter, which hadn't seen a lot of use before, works great with the 200-600 lens for up to 1200mm of resolving power! This teleconverter seems to handle that lens much better than it did the 70-200 f/2.8 GM. With the 200-600 lens, low light performance leaves a lot to be desired, but under bright birding conditions, the teleconverter shines! Final recommendations: If you need more reach for the 70-200 GM lens, get the 1.4x teleconverter. The 2x will hinder more than it helps. If you need more reach for the 200-600 G lens, get the 2.0x teleconverter, but be aware of poor low-light performance. I have not tested with the 100-400 GM lens, I do not own that lens. Update 2: I used the A7rII + 200-600 G lens + 2x teleconverter + tripod + shutterless bulb mode to capture the Jupiter Saturn conjunction back in April. After some post-processing and image stacking, I was able to achieve the attached post-processed photo. Not too shabby for not using a telescope!
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Reviewed in the United States on January 1, 2018 by VJS VJS
On some A7R3 cameras this will give you a false sense of auto focus capability until you go home and process your blurry pics. Always manually focus after 650mm on this beast. If you have the A9 camera, it will perform a little better than the r2 and r3 series. I would call this a landscaping teleconverter for the 100-400 whereas the 1.4 makes a great wildlife. Both are great in their own ways. Losing two stops is no biggie. Just make sure that you manually focus even if it indicates it has obtained focus. Overall a 5 star product for its intended purpose.
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Reviewed in the United States on August 10, 2018 by PVFocus
Paired this with A7IV and 70-200 GM MK2 the best gear out right now . It definitely felt like a slap in the mouth to throw this magnifier on the back of a $3k lens. The 70-200 is a razer sharp beast, which was sadly held back by this converter. I used this in sport’s photography which was not at all a good combo. I could see it working for some wildlife photography but definitely not fast or sharp enough for sports. The 5.6 aperature definitely also sets you back with heavy grain. This was a sad return for me considering I didn’t want to spend another 3-4k on a telephoto. But you get what you pay for. It does the job but sadly does lose a ton of quality. Gives off very soft edges and hazy effects.
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Reviewed in the United States on June 6, 2023 by Andrew Yepez