The Sony FE 2x Teleconverter (SEL20TC) is a compact, weather-sealed extender designed for select Sony FE telephoto lenses. It delivers a true 2.0× magnification while maintaining native autofocus and EXIF, making it a smart way to capture distant wildlife, sports, and underwater subjects without changing your working distance.
Engineered for the Sony 2x teleconverter user who demands image quality, it pairs seamlessly with compatible full-frame E-mount lenses such as the 70-200mm GM, 100-400mm GM, and 200-600mm G—ideal when travel weight matters but reach is non-negotiable.
- 2.0× reach with native AF, metering & EXIF
- Approximately 2-stop light reduction (fast shutter options maintained in bright light)
- Weather-resistant build with precision-matched optics
- Compact: slip into any pouch; adds minimal length
- Optimized for Sony G/G Master telephotos
Compatible Lenses
- FE 70-200mm f/2.8 GM OSS
- FE 70-200mm f/2.8 GM OSS II
- FE 70-200mm f/4 Macro G OSS II
- FE 100-400mm f/4.5-5.6 GM OSS
- FE 200-600mm f/5.6-6.3 G OSS
- FE 400mm f/2.8 GM OSS
- FE 600mm f/4 GM OSS
Double the Focal Length, Keep the Handling
Go from 200mm to 400mm—or 600mm to 1200mm equivalent (on APS-C)—without changing your familiar rig balance. The compact extender preserves your lens’ ergonomics so you can track erratic subjects confidently.
- True 2.0× magnification
- Minimal added length and weight
- Unchanged minimum focus distance for higher macro-like magnification
Optics Tuned for G & G Master Performance
Precision-matched elements maintain contrast and edge definition when paired with supported Sony telephotos. Expect dependable autofocus in good light and consistent color/EXIF for streamlined editing and metadata.
- Native AF & metering passthrough
- Advanced coatings for flare control
- Weather-resistant seals at mount interfaces
Buy with Confidence
Sony’s FE system is trusted by professionals worldwide. This teleconverter is built to the same standard, with tight tolerances for fast lenses and long barrels. Your purchase from Bluewater Photo is backed by manufacturer warranty support and our expert team who shoot topside and underwater—ready to help you choose the right lens, port, and strobe pairing.
Pack light, shoot far—unlock super-tele reach with your existing Sony glass.
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- Sony a1 II underwater housing — full details of all underwater housings for the Sony a1 II
- Sony a9 III underwater housing — full details of all underwater housings for the Sony a9 III
- Sony a6700 underwater housing — full details of all underwater housings for the Sony a6700
Learn More — Guides & Articles
- Best Underwater Camera for 2025 — Our top picks for the best cameras for underwater photography for 2025.
- Best Dive Computer — Our top dive computer picks for 2025
- Underwater Photography Guide — lighting & strobe technique fundamentals
- Best Regulator Guide 2024 — ensure you have the perfect regulator for underwater photography
Specifications
- Imaging
- Magnification: 2.0×
- Light Loss: ~2 stops
- AF/AE/EXIF: Maintained with compatible lenses/bodies
- Minimum Focus Distance: Unchanged from host lens (effective magnification increases)
- Compatibility
- Mount: Sony E (full-frame & APS-C)
- Optimized for: FE 70-200mm F2.8 GM (incl. II), FE 100-400mm GM, FE 200-600mm G, and other official Sony-listed lenses
- Not compatible with every FE lens—check your specific model before purchase
- Optical Design & Build
- High-precision elements with multi-coating
- Weather-resistant construction; fluorine on exposed surfaces
- Metal mount; robust alignment for heavy telephotos
- Physical
- Approx. Dimensions: Ø ~62 mm × ~43 mm
- Approx. Weight: ~200 g
- Color: Black; includes front & rear caps
- Sony FE 2x Teleconverter
- Front Lens Cap
- Rear Lens Cap
- Case
- Limited 1-Year Manufacturer Warranty
Why Buy from Bluewater
- Authorized Garmin & dive gear dealer — full manufacturer warranty.
- Founded and staffed by active divers, underwater photographers, and explorers.
- Decades of combined hands-on experience with the gear we sell.
- We test and use most of the equipment ourselves before recommending it.
2. Risk-Free Purchase (See Terms Of Service)
- 30-day, hassle-free returns (unused condition).
- Secure payment with trusted gateways (credit card, PayPal, etc.).
- All products shipped in factory-sealed boxes (unless stated).
- Transparent policies — no hidden fees or fine-print surprises.
3. Fast & Reliable Delivery
- Free U.S. shipping over $200 for Photo Gear & $50 for Dive Gear.
- Same-day dispatch on in-stock orders placed before 12pm.
- Worldwide shipping options with reliable carriers.
- Real-time tracking updates sent straight to your inbox.
4. Extra Value at No Extra Cost
- Lifetime product support by email, phone, or in-store.
- Setup help & usage tips tailored to your needs.
- Exclusive buyer’s guides, tutorials, and dive trip invitations.
- Early access to special promotions & new releases.
5. Social Proof & Community
- Thousands of satisfied divers & underwater photographers worldwide.
- 5-star average product & service ratings.
- Active in dive events, conservation projects, and photography competitions.
6. Personal Connection
- Direct line to our in-house experts — no outsourced call centers.
- Friendly, passionate staff who speak “diver” fluently.
- We care about your whole adventure, not just the sale.
We offer lifetime support with all purchases.
Please call or email us with any questions; our knowledgeable staff would love to assist you.
