Transit depth differences for selected filter combinations (indicated by symbols) that provide S/Ns above unity, when co-adding five transits. Differences are shown for an E-ELT (left) and a JWST configuration (right) for the Earth-like planets around different types of central stars (F-star: red, G-star: black, K-star: blue) at different orbital distances (increasing from left to right, indicated by the increase in surface temperature). Error bars are only shown for filter combinations with differences larger than zero within their 1σ uncertainty. For clarity reasons the different filter combinations are shifted by 0.5 K.