Needless to explain, you know that this is an entry level lens when you lay your eyes on its maximum aperture of f/3.5.
In 70s - 80s, it is not an easy task to look for a 135mm prime lens which got a smaller maximum aperture.
However, you miss a treasure if you judge Canon FD 135mm f/3.5 by this aspect.
It comes with a fairly good performance compare with its low price.
