How to describe magnification in figure texts of a thesis? - (Feb/12/2012 )

I have been including scale bars in microscopic photographs that are presented in my thesis. Is it necessary to include the lens magnification in figure texts or would the scale bar suffice? Would it be practical to include details of final magnification even after print in the figure text or is does the scale bar do the job?

Provided the scale bar has a measurement on it, it should be enough. You could if you like also supply the magnification in the text somewhere, but it is not absolutely necessary.

Thanks Bob1, very much appreciated.