If you shoot birds, wildlife or motorsport, you know the frustration of a subject sitting just beyond your lens. The Sony FE 2x Teleconverter (SEL20TC) is one of the simplest ways to fix that without buying a bigger lens. This guide covers what UK buyers should check before ordering: what it does, which lenses it suits, the trade-offs, and how price, delivery and warranty work.
What Is the Sony SEL20TC?
The SEL20TC is a dedicated 2x teleconverter for Sony E-mount mirrorless cameras. It sits between your compatible telephoto lens and your camera body and doubles the magnification. A 200mm lens behaves like a 400mm lens, and a 400mm lens like an 800mm lens, with a much narrower field of view.
Because it is a dedicated Sony design, it keeps full communication between the lens and camera. That means auto-exposure metering, autofocus and Optical SteadyShot image stabilisation continue to work. It also has a dust- and moisture-resistant construction, which matters in British weather.
Key Specifications
| Spec | Detail |
|---|---|
| Mount | Sony E |
| Magnification | 2x |
| Optical design | 8 elements in 5 groups |
| Light loss | 2 stops |
| Length | 42.7 mm (1.68") |
| Diameter | 63.5 mm (2.50") |
| Weight | 207 g (7.3 oz) |
At 207 g, it adds far less weight and bulk to your bag than a second long lens would.
Who Should Buy It?
The SEL20TC suits you if you:
- Photograph birds and wildlife and often can’t get physically closer, whether at an RSPB reserve, a coastal colony or a woodland hide.
- Shoot sports or motorsport from fixed positions.
- Travel light and want extra reach without carrying another heavy lens.
- Already own a compatible Sony telephoto lens and want to get more from it.
It is less suitable if you mostly shoot in dim light, because of the light loss covered below.
Check Lens Compatibility First
The SEL20TC does not work with every Sony lens. It is designed for selected telephoto lenses, such as certain G Master and G models like the FE 70-200mm F2.8 GM OSS, FE 100-400mm GM OSS and FE 200-600mm G OSS. Before you buy, check Sony’s official compatibility list for your exact lens and camera body. It is the most reliable way to avoid an expensive mistake.
The Trade-Offs
A 2x teleconverter is a trade, and it’s better to know that before you buy:
- 2 stops of light loss. An f/2.8 lens effectively becomes f/5.6, and an f/5.6 lens becomes f/11. In dull UK autumn and winter light you’ll need a higher ISO or a slower shutter speed.
- Some reduction in sharpness. Detail holds up best in good light with a good lens and solid technique.
- Autofocus behaviour varies. Performance depends on the lens and camera body you pair it with, so check the specs of your setup.
Customers on the Cameriz product page rate it 4.88 out of 5 across 8 reviews. They mention a secure fit, dependable autofocus with compatible lenses, and strong detail in good light. They also note the reduced brightness in poor light, so the pattern is consistent.
Teleconverter vs Crop Mode vs a Longer Lens
- Crop mode costs nothing, but it reduces your resolution because you’re using only part of the sensor.
- A longer lens gives the best results, but costs far more and is heavier to carry.
- A teleconverter sits in between. It is a modest cost, light to carry, and keeps more of your sensor’s detail in good conditions.
For many photographers who already own a suitable telephoto lens, the teleconverter is the most practical way to get more reach.
Price in the UK
The Sony FE 2x Teleconverter (SEL20TC) is listed at £364 including VAT at Cameriz Limited. The price already includes VAT, so there are no surprises at checkout.
Delivery
Cameriz is a UK-based seller shipping brand-new camera gear across UK and EU.
Warranty and Returns
- Warranty: Cameriz states a 2-year warranty on cameras, camera lenses and camcorders. Check the warranty policy page for how it applies to this item before you order.
- Returns: a 14-day return window applies, but the product must be in its original sealed pack to qualify for a refund. Don’t open the box until you’re sure it’s compatible with your lens.
Quick Buying Checklist
- Confirm your lens is on Sony’s compatibility list for the SEL20TC.
- Check that your camera body supports the lens and converter combination.
- Make sure you’re comfortable with 2 stops of light loss for the light you usually shoot in.
- Keep the packaging sealed until you’ve confirmed everything fits.
- Check the price includes VAT and the delivery window suits your next shoot.
Where to Buy
You can buy the Sony FE 2x Teleconverter (SEL20TC) at Cameriz Limited.
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