Image on top shows the Fujinon 1.5x Tele Converter which sells for many thousends of Dollars on BHphoto

On Reddit Viltrox announced this:

We’ll soon be launching a front teleconverter (increasing the focal length by 1.4×) and a wide-angle conversion lens (reducing the focal length to 0.8×). With these, you can instantly unlock new focal lengths without changing your camera. Stay tuned, and thank you for your question!

Here are some examples of conversions you get on Sony lenses:

• Sony FE 12–24mm f/2.8 GM
  • 1.4× → 17–34mm
  • 0.8× → 10–19mm
• Sony FE PZ 28–135mm f/4 G OSS
  • 1.4× → 39–189mm
  • 0.8× → 22–108mm
• Sony FE 100–400mm f/4.5–5.6 GM OSS
  • 1.4× → 140–560mm
  • 0.8× → 80–320mm
• Sony FE 50mm f/1.2 GM
  • 1.4× → 70mm
  • 0.8× → 40mm
• Sony FE 200–600mm f/5.6–6.3 G OSS
  • 1.4× → 280–840mm
  • 0.8× → 160–480mm
• Sony FE 16–35mm f/2.8 GM
  • 1.4× → 22–49mm
  • 0.8× → 13–28mm
• Sony FE 70–200mm f/2.8 GM OSS
  • 1.4× → 98–280mm
  • 0.8× → 56–160mm
• Sony FE 14mm f/1.8 GM
  • 1.4× → 20mm
  • 0.8× → 11mm
• Sony E 16–55mm f/2.8 G (APS-C)
  • 1.4× → 22–77mm
  • 0.8× → 13–44mm
• Sony FE 35mm f/1.4 GM
  • 1.4× → 49–50mm
  • 0.8× → 28mm
• Sony FE 24mm f/1.4 GM
  • 1.4× → 34mm
  • 0.8× → 19mm
• Sony FE 24–70mm f/2.8 GM
  • 1.4× → 34–98mm
  • 0.8× → 19–56mm
• Sony FE 70–300mm f/4.5–5.6 G OSS
  • 1.4× → 98–420mm
  • 0.8× → 56–240mm
• Sony FE 85mm f/1.4 GM
  • 1.4× → 119mm
  • 0.8× → 68mm
• Sony FE 50mm f/1.4 GM
  • 1.4× → 70mm
  • 0.8× → 40mm
• Sony FE 16–25mm f/2.8 G
  • 1.4× → 22–35mm
  • 0.8× → 13–20mm
• Sony FE 24–240mm f/3.5–6.3 OSS
  • 1.4× → 34–336mm
  • 0.8× → 19–192mm
• Sony FE PZ 16–35mm f/4 G
  • 1.4× → 22–49mm
  • 0.8× → 13–28mm
• Sony FE 24–50mm f/2.8 G
  • 1.4× → 34–70mm
  • 0.8× → 19–40mm
• Sony FE 20–70mm f/4 G
  • 1.4× → 28–98mm
  • 0.8× → 16–56mm
• Sony E 70–350mm f/4.5–6.3 G OSS (APS-C)
  • 1.4× → 98–490mm
  • 0.8× → 56–280mm
• Sony FE 24–105mm f/4 G OSS
  • 1.4× → 34–147mm
  • 0.8× → 19–84mm
• Sony Sonnar T* FE 55mm f/1.8 ZA
  • 1.4× → 77mm
  • 0.8× → 44mm
• Sony FE 20mm f/1.8 G
  • 1.4× → 28mm
  • 0.8× → 16mm