Olympus 40-150mm f/2.8 + 1.4x

Compact, light and flawless build quality ; Dust-, splash- & freeze-proof ; Very good image quality ; Fast and accurate AF

1 stop light loss ; Currently only usable with the Olympus 40-150 mm f/2.8 Pro

I have a weakness for good teleconverters. And this is one of them. A miniscule insertion weighing 100 grams that you keep in your photo bag and that will save your bacon when you need a big telephoto lens. No lugging, a lot of fun. When the quality is...