The Canon MP-E 65mm works differently than my other macro lenses. Compare:
- With a standard 35mm macro, I can frame first and then adjust focus which only changes framing very slightly with.
- With the MP-E 65mm changing focus completely changes framing.
Assuming that the angle of view corresponds to a 65mm lens at 1X magnification, it seems that by 5X, the angle of view is about that of a 325mm lens! In other words, manual focusing (this lens does not autofocus at all) looks like it has the same effect as zooming on a zoom lens with the plane of focus fixed at the closest focus-distance.
So why is this not called a MP-E 65-325mm instead of simply 65mm? More importantly, what does the 65mm focal-length represent? And how can I use that to frame by shots with less guesswork?