okaro said:
With EOS M the main idea is size. If you want a dedicated Macro Lens for specific purposes then Canon surely has one that can be used with any of their SLRs or with EOS M using an adapter. When they lenses for EOS M the size is a major issue. This means the size of the lens and also the size of the total equipment. A 28 mm is wide enough to be carried as a sole lens and it can also be used for occasional macro shots. A 60 mm would not meet these requirements. Sure the aperture is slow but the IS compensates this so it about matches the 22 mm. The standard kit lens has aperture f/4.5 at 28 mm. Sure it is close with the 22 mm but that's not an issue as it is not expected that one carries both.
You should have stopped with your first sentence. This lens is the
second prime offering for the M. While I certainly do appreciate having a macro lens for this system, it should have more differentiation from the solitary first. Nobody that has an M and wants to use primes will ever leave home without the 22. It is tiny, it is quick and it is sharp. What does this 28 bring to the table other than macro? Sure, presumably it will be sharper than the 22 and the 18-55 and it has IS, but it is still a slow lens with an odd focal length. It is hard to believe that increasing the FL to 35-40mm and/or increasing max aperture to
at least f/2.8 would dramatically increase the size. And even if it did, so what? If the sole purpose of the M was diminutive size, than there would be no zoom lenses at all. Lastly, the introduction of this lens makes it unlikely that Canon will release another macro in a FL which I (and I suspect others) consider more appropriate in my lifetime. This lens is too much of a one trick pony. While I am not in the camp that desires
really fast primes for the M, I do feel that any prime released should be between f/1/8 and f/2.4, with the possible exception of a nice macro in an appropriate FL

OK, I feel better now.