Getting PlotLegend to show the exponential of values?

I made a contour plot in Mathematica, and am currently using PlotLegends->Automatic. But, instead of having the legend labels show the values of the function, I want it to show the Exp of the function. How can I do this?

Here is my code and the label I get:

ContourPlot[
 Log[n1[2.772861961857343*10^-6, .9, 2.8, a, b, .6, .3, .5]], 
 {b, 1, 3}, {a, .5, 1.5}, PlotLegends -> Automatic, 
 FrameLabel -> {"π", "β"}, 
 PlotLabel -> 
   "!(*SubscriptBox[(n), ([Lambda]1)]), !(*SubscriptBox[(f), (1)])=0.9", 
 Contours -> 10, 
 ColorFunction -> "CandyColors"]